2007 ISUZU KB P190 sensor

Automatic Transmission – 4L60E – General Information Page 7C1–23
J34196-B
Bush Remover/Installer Set
Used for various applications,
described in the text.
Previously released Unique
J34627
Snap Ring Pliers
Specific purpose is to assist in the
removal/replacement of the output
shaft snap ring.
Previously released Unique
J35138
Torque Converter End Play
To be used in conjunction with
commercially available magnetic
stand and dial indicator.
Previously released Unique
J36352 Speed Sensor Installer &
Gauging Tool
Needed to correctly install the output
speed sensor ring to the main shaft.
Comprises sleeve, J36352-6 and C-
washer J36352-4.
Previously released Unique
J36418-B

Turbine Shaft Seal Installer &
Resizer
Used to install and re-size the turbine
shaft seal. Comprises J36418-1B
installer and J36418-2A resizer.
Previously released Unique
J37789-A
Oil Pump Remover
Used with J39119 to remove the oil
pump assembly.
Previously released Unique
J38735-3 Stator Shaft Sealing Ring Installer
Used with J39855-1 to install the
stator shaft seal.
Previously released Unique
J39119
Oil Pump Remover Adaptor
Used with J37789-A to remove the oil
pump assembly.
Previously released Unique

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ISUZU KB P190 2007

Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–2
4 Diagnostics ...........................................................................................................................................27
4.1 Introduction ................................................................................................................... ....................................... 27
4.2 Basic Knowledge Required ....................................................................................................... .......................... 27
4.3 Diagnostic Precautions ....................................................................................................................................... 27
4.4 Preliminary Checks.............................................................................................................................................. 28
4.5 Diagnostic Trouble Code Tables ................................................................................................. ....................... 29
Multiple DTCs Fault Condition ............................................................................................................................ 29
4.6 Diagnostic Trouble Code Definitions ............................................................................................ ..................... 29
Type A – Emission Related DTCs ....................................................................................................................... 29
Type B – Emission Related DTCs ....................................................................................................................... 30
Conditions for Clearing Type A or Type B DTCs .................................................................................. ............ 30
Type C – Non-emission Related DTCs ............................................................................................................... 30
Conditions for Clearing Type C DTCs .............................................................................................................. 30
Current DTCs........................................................................................................................................................ 30
History DTCs ........................................................................................................................................................ 30
4.7 Diagnostic System Check ........................................................................................................ ........................... 30
Description ........................................................................................................................................................... 30
Test Description ................................................................................................................................................... 31
4.8 Diagnostic Trouble Code List ................................................................................................... .......................... 31
4.9 DTC P0218 – Transmission Fluid Overtemperature................................................................................. ......... 33
DTC Description ................................................................................................................................................... 33
Circuit Description ............................................................................................................................................... 33
Conditions for Running the DTC ................................................................................................. ....................... 33
Conditions for Setting the DTC........................................................................................................................... 33
Action Taken When the DTC Sets ................................................................................................. ..................... 33
Conditions for Clearing the DTC ........................................................................................................................ 34
Diagnostic Aids .................................................................................................................................................... 34
Test Description ................................................................................................................................................... 34
DTC P0218 Diagnostic Table..................................................................................................... .......................... 34
4.10 DTC P0562 – System Voltage Low ................................................................................................. .................... 35
DTC Description ................................................................................................................................................... 35
Circuit Description ............................................................................................................................................... 35
Conditions for Running the DTC ................................................................................................. ....................... 36
Conditions for Setting the DTC........................................................................................................................... 36
Action Taken When the DTC Sets ................................................................................................. ..................... 36
Conditions for Clearing the DTC ........................................................................................................................ 36
Diagnostic Aids .................................................................................................................................................... 36
Test Description ................................................................................................................................................... 36
DTC P0562 Diagnostic Table..................................................................................................... .......................... 36
4.11 DTC P0563 – System Voltage High................................................................................................ ..................... 38
DTC Description ................................................................................................................................................... 38
Circuit Description ............................................................................................................................................... 38
Conditions for Running the DTC ................................................................................................. ....................... 38
Conditions for Setting the DTC........................................................................................................................... 39
Action Taken When the DTC Sets ................................................................................................. ..................... 39
Conditions for Clearing the DTC ........................................................................................................................ 39
Diagnostic Aids .................................................................................................................................................... 39
Test Description ................................................................................................................................................... 39
DTC P0563 Diagnostic Table..................................................................................................... .......................... 39
4.12 DTC P0601 to P0604 or P1621 – TCM Malfunction .................................................................................. .......... 41
DTC Description ................................................................................................................................................... 41
Circuit Description ............................................................................................................................................... 41
Conditions for Running the DTC ................................................................................................. ....................... 41
Conditions for Setting the DTC........................................................................................................................... 41
Action Taken When the DTC Sets ................................................................................................. ..................... 42
Conditions for Clearing the DTC ........................................................................................................................ 42
Test Description ................................................................................................................................................... 42
DTC P0601 to P0604 or P1621 Diagnostic Table ................................................................................... ............ 42
4.13 DTC P0711 to P0713 – Transmission Fluid Temperature Sensor .................................................................... 4 3
DTC Description ................................................................................................................................................... 43

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–3
Circuit Description ............................................................................................................................................... 43
Conditions for Running the DTC ........................................................................................................................ 43
DTC P0711 ...................................................................................................................................................... 43
DTC P0712 ...................................................................................................................................................... 43
DTC P0713 ...................................................................................................................................................... 44
Conditions for Setting the DTC................................................................................................. .......................... 44
DTC P0711 ...................................................................................................................................................... 44
DTC P0712 ...................................................................................................................................................... 44
DTC P0713 ...................................................................................................................................................... 44
Action Taken When the DTC Sets ................................................................................................. ..................... 44
Conditions for Clearing the DTC ........................................................................................................................ 44
Diagnostic Aids .................................................................................................................................................... 45
Test Description ................................................................................................................................................... 45
DTC P0711 to P0713 Diagnostic Table ............................................................................................ ................... 45
4.14 DTC P0719 – Brake Switch Circuit High Input (Stuck On) ......................................................................... ....... 47
DTC Description ................................................................................................................................................... 47
Circuit Description ............................................................................................................................................... 47
Conditions for Running the DTC ................................................................................................. ....................... 47
Conditions for Setting the DTC........................................................................................................................... 47
Action Taken When the DTC Sets ................................................................................................. ..................... 47
Conditions for Clearing the DTC ........................................................................................................................ 47
Diagnostic Aids .................................................................................................................................................... 48
Test Description ................................................................................................................................................... 48
DTC P0719 Diagnostic Table..................................................................................................... .......................... 48
4.15 DTC P0722 – Vehicle Speed Sensor Circuit Low Voltage........................................................................... ...... 49
DTC Description ................................................................................................................................................... 49
Circuit Description ............................................................................................................................................... 49
Conditions for Running the DTC ................................................................................................. ....................... 49
Conditions for Setting the DTC........................................................................................................................... 49
Action Taken When the DTC Sets ................................................................................................. ..................... 50
Conditions for Clearing the DTC ........................................................................................................................ 50
Diagnostic Aids .................................................................................................................................................... 50
Test Description ................................................................................................................................................... 50
DTC P0722 Diagnostic Table..................................................................................................... .......................... 50
4.16 DTC P0723 – Vehicle Speed Sensor Circuit Intermittent .......................................................................... ........ 52
DTC Description ................................................................................................................................................... 52
Circuit Description ............................................................................................................................................... 52
Conditions for Running the DTC ................................................................................................. ....................... 52
Conditions for Setting the DTC........................................................................................................................... 53
Action Taken When the DTC Sets ................................................................................................. ..................... 53
Conditions for Clearing the DTC ........................................................................................................................ 53
Diagnostic Aids .................................................................................................................................................... 53
Test Description ................................................................................................................................................... 53
DTC P0723 Diagnostic Table..................................................................................................... .......................... 54
4.17 DTC P0724 – Brake Switch Circuit Low Input (Stuck Off) ................................................................................ 55
DTC Description ................................................................................................................................................... 55
Circuit Description ............................................................................................................................................... 55
Conditions for Running the DTC ................................................................................................. ....................... 56
Conditions for Setting the DTC........................................................................................................................... 56
Action Taken When the DTC Sets ................................................................................................. ..................... 56
Conditions for Clearing the DTC ........................................................................................................................ 56
Diagnostic Aids .................................................................................................................................................... 56
Test Description ................................................................................................................................................... 56
DTC P0724 Diagnostic Table..................................................................................................... .......................... 56
4.18 DTC P0741 – Torque Converter Clutch System – Stuck Off......................................................................... .... 57
DTC Description ................................................................................................................................................... 57
Circuit Description ............................................................................................................................................... 57
Conditions for Running the DTC ................................................................................................. ....................... 58
Conditions for Setting the DTC........................................................................................................................... 58
Action Taken When the DTC Sets ................................................................................................. ..................... 58

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–7
DTC P2770 Diagnostic Table............................................................................................................................. 120
4.37 DTC U0073 and U0100 – CAN-Bus No Communication With ECM (Engine Control Module)...................... 121
DTC Description ................................................................................................................................................. 121
Circuit Description ............................................................................................................................................. 121
Conditions for Running the DTC ................................................................................................. ..................... 121
Conditions for Setting the DTC......................................................................................................................... 121
DTC U0073 .................................................................................................................................................... 121
DTC U0100 .................................................................................................................................................... 121
Action Taken When the DTC Sets ................................................................................................. ................... 122
Conditions for Clearing the DTC ...................................................................................................................... 122
Test Description ................................................................................................................................................. 122
DTC P0864 and U0101 Diagnostic Table........................................................................................... ............... 122
5 Electrical Specifications ....................................................................................................................124
5.1 Transmission Fluid Temperature (TFT) Sensor Specifications ..................................................................... 124
5.2 Range Reference................................................................................................................................................ 124
5.3 Transmission Fluid Pressure Manual Valve Position Switch Logic .............................................................. 125
5.4 Transmission Range Switch Logic................................................................................................................... 125
5.5 Component Resistance ..................................................................................................................................... 126
5.6 Shift Solenoid Valve State and Gear Ratio ...................................................................................................... 126
5.7 Line Pressure ..................................................................................................................................................... 126
6 Special Tools ......................................................................................................................................127



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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–8
1 General Information
1.1 Introduction
This Section covers the electrical diagnostic for the 4L60E automatic transmission when mated to a V6 engine.
1.2 General Description
The 4L60E automatic transmission incorporates electronic controls that utilise a transmission control module (TCM) to
control shift points through:
• the 1-2 and 2-3 shift solenoid valves,
• the 3-2 downshift solenoid valve,
• a torque converter clutch (TCC) solenoid valve,
• apply and release through the TCC pulse width modulated (PW M) solenoid valve, and
• line pressure through the pressure control (PC) solenoid valve.
Electrical signals from various sensors provide information to the TCM about the following:
• vehicle speed,
• throttle position,
• engine coolant temperature,
• transmission fluid temperature,
• gear range selector position,
• engine speed,
• converter turbine speed, and
• engine load braking and operating mode.
The TCM uses this information to determine the precise moment to upshift or downshift, apply or release the TCC and
what fluid pressure is needed to apply the clutches. This type of control provides consistent and precise shift points and
shift quality based on the operating conditions of the vehicle.
Figure 7C2 – 1 shows the location of the internal electronic components in the transmission.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–9

Figure 7C2 – 1
Legend
1 Vehicle Speed Sensor 5 Torque Converter Clutch Pulse Width Modulation (TCC
PWM) Solenoid Valve
2 1-2 Shift Solenoid (Solenoid A) and 2-3 Shift Solenoid (Solenoid B) 6 Torque Converter Clutch (TCC) Solenoid Valve
3
Automatic Transmission Fluid Pressure (TFP) Manual Valve
Position 7 Pressure Control (PC) Solenoid Valve
4 3-2 Downshift Solenoid
Transmission Adaptive Functions
The 4L60E automatic transmission uses a line pressure control system, which has the ability to adapt the system line
pressure to compensate for normal wear within the transmission, such as the clutch pack fibre plates, seals, springs, etc.
The adapt feature is similar in function to the long term/short term fuel trim feature of the engine management system.
The 4L60E automatic transmission uses the adapt function for garage shifts, upshifts and torque converter clutch (TCC)
application. The TCM monitors the engine torque to determine if the shift is occurring too fast or too slow and adjusts the
pressure control solenoid to maintain the correct shift feel.

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ISUZU KB P190 2007

Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–11

Figure 7C2 – 2
The TCM is an electronic control module receiving input or providing output to control the operation of the 4L60E
automatic transmission.
The TCM receives the following inputs from the engine control module (ECM):
• engine speed and torque values,
• engine intake air temperature (IAT), accelerator pedal position (APP) information,
• engine coolant temperature (ECT),
• driver selected shift mode, and
• air-conditioning (A/C) status.
The ECM provides this data to the TCM through the databus.
Other TCM inputs are:
• battery and ignition voltage,
• brake switch status,
• transmission fluid temperature (TFT), and
vehicle speed sensor (VSS).
The TCM provides the following outputs to control the automatic transmission:
• shift solenoids to control transmission shifting,
• torque converter clutch (TCC) pulse width modulated (PW M) solenoid operation to control the apply and release of
the torque converter clutch assembly, and
• pressure control (PC) solenoid to regulate the transmission line pressure.
Other TCM outputs provided to the ECM / PIM are:
• MIL illumination request,
• vehicle speed,

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–22
negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted to
increase shift time.
A/C Clutch: This parameter displays the condition of the sirconditioning compressor as either On or Off .
AT Output Speed: This parameter displays the rotational speed of the transmission output shaft. Tech 2 displays output
shaft speed as revolutions per minute (RPM).
Commanded Gear: This parameter displays the current commanded state of the shift solenoid valves. Tech 2 displays 1,
2 , 3 or 4.
Current TAP Cell: This parameter displays the current transmission adaptive pressure (TAP) cell in use for transmission
line pressure adaptation. The cells are based on 17 Nm of engine torque. The higher the engine torque, the higher the
current TAP cell. The last cell used will remain displayed until the next adaptable upshift occurs.
Engine Coolant Temperature: This parameter displays the input signal from the engine coolant temperate (ECT)
sensor. ECT is high at 151°C when the signal voltage is low, 0 V. ECT is low at -40°C when the signal voltage is high,
5 V.
Engine Speed: This parameter displays the rotational speed of the engine expressed as revolutions per minute.
Engine Torque: This parameter displays the calculated value based on engine load, throttle position, mass air flow, and
other engine inputs. This parameter is accurate to within 20 Nm of actual measured engine torque.
Estimated Gear Ratio: This parameter displays the estimated turbine speed divided by the transmission output speed.
Estimated turbine speed is calculated from engine speed and engine torque.
Ignition Voltage: This parameter displays the
system voltage measured at the ignition feed.
Latest Shift: This parameter displays the actual time of the last upshift. This value is only accurate if the shift was
adaptable.
PCS Actual Current: This parameter displays the current flow through the pressure control solenoid circuit, which is
measured by the control module. High current flow results in low line pressure. Low current flow results in high line
pressure.
PCS Duty Cycle: This parameter displays the commanded state of the pressure control solenoid, expressed as a
percentage of energised on time. A reading of low percent indicates zero on time, non-energised, or no current flow. A
high percent at idle indicates maximum on time, energised, or high current flow.
PCS Desired Current: This parameter displays the commanded current of the pressure control solenoid circuit. High
current results in low line pressure. Low current results in high line pressure.
Shift Pattern: This parameter displays Normal, Power or Cruise depending on what mode the transmission is in.
Shift Solenoid A: This parameter displays the commanded state of the 1-2 shift solenoid valve. W hen the transmission
is in 1
st and 4th gear, the display should indicate On; current is flowing through the solenoid. When the transmission is in
2nd and 3rd gear, the display should indicate Off; current is not flowing through the solenoid.
Shift Solenoid A Circuit: This parameter displays whether an open or a short to ground, short to battery or the circuit is
okay in the 1-2 shift solenoid valve feedback signal. The 1-2 shift solenoid valve must be commanded off and on.
Shift Solenoid B: This parameter displays the commanded state of the 2-3 shift solenoid valve. W hen the transmission
is in 1
st and 4th gear, the display should indicate On; current is flowing through the solenoid. When the transmission is in
2nd and 3rd gear, the display should indicate Off; current is not flowing through the solenoid.
Shift Solenoid B Circuit: This parameter displays whether an open or a short to ground, short to battery or the circuit is
okay in the 2-3 shift solenoid valve feedback signal. The 2-3 shift solenoid valve must be commanded off and on.
Speed Ratio: This parameter displays the calculated speed ratio of the transmission.
TCC Duty Cycle Circuit: This parameter displays whether an open or a short to ground, short to battery or the circuit is
okay in the TCC PW M solenoid valve feedback signal. The TCC PW M solenoid valve must be commanded off and on.
TCC Solenoid: This parameter displays the commanded sate of the TCC solenoid. On indicates a commanded
energised state; current is flowing through the solenoid. Off indicates a commanded non-energised state; current is not
flowing through the solenoid. This commanded state occurs at various vehicle speeds between applications.
TCC Slip Speed: This parameter displays the difference between transmission output speed and engine speed. A
negative value indicates the engine speed is less than the output speed, deceleration. A positive value indicates the
engine speed is greater than the output speed, acceleration. A value of zero indicates the engine speed is equal to the
output speed, TCC applied.
TCC PWM Solenoid: This parameter displays the commanded percentage of on time for the TCC PWM solenoid. A high
percentage represents an on, energised, commanded state.0 percent represents an off, non-energised, commanded
state.

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