2007 ISUZU KB P190 engine oil

Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–57
Step Action Yes No
3 Test the stop lamp switch assembly, refer to 8B Cruise Control.
Is the stop lamp switch assembly serviceable? Go to Step 4 Replace the stop
lamp switch assembly
4 1 Disconnect connector C-96 from the TCM.
2 Using a multimeter set to measure voltage, probe between harness connector C-96 pin 42 and a known ground.
3 Press the brake pedal.
Does the multimeter display battery voltage? Go to Step 5 Repair or replace
affected circuit
Go to Step 6
5 Replace the TCM, refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing.
Did you complete the replacement? Go to Step 6 —
6 Perform the following procedure to verify the repair:
1 On Tech 2 select: Diagnostic Trouble Codes / Clear Engine & Transmission
DTCs.
2 Follow the instructions on Tech 2 and clear any DTCs.
3 Operate the vehicle under the following conditions:
• Turn on the ignition, with the engine off for at least
2 seconds.
• Start the vehicle and idle for 5 seconds.
• Drive in D4 from 0 – 60 km/h then brake, eight times in one
ignition cycle.
4 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has DTC P0724 set? Go to Step 2 Go to Step 7
7 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Does Tech 2 display any DTCs you have not diagnosed? Refer to
4.8 Diagnostic Trouble Code List System OK
When all diagnosis and repairs are completed, check the
system for correct operation.
4.18 DTC P0741 – Torque Converter Clutch
System – Stuck Off
DTC Description
This diagnostic procedure supports DTC P0741 Torque Converter Clutch (TCC) System - Stuck Off.
Circuit Description
The torque converter clutch (TCC) solenoid valve is a normally-open exhaust valve that is used with the torque converter
clutch pulse width modulation (TCC PWM) solenoid valve to control fluid acting on the converter clutch apply valve. The
TCC solenoid valve attaches to the transmission case assembly extending into the pump cover. W hen grounded by the
transmission control module (TCM), the TCC solenoid valve stops converter signal oil from exhausting. This causes
converter signal oil pressure to increase and move the converter clutch apply valve against spring force and into the
apply position. In this position, release fluid is open to an exhaust port and converter feed fluid fills the apply fluid circu it.
The converter feed fluid applies the TCC. When the TCM no longer provides a ground path, the TCC solenoid valve de-
energizes and apply fluid exhausts, releasing the TCC.
When the TCM detects high torque converter slip when the TCC is commanded off, then DTC P0741 sets. DTC P0741 is
a type B DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–60
Step Action Yes No
4 Perform the following procedure to verify the repair:
1 On Tech 2 select: Diagnostic Trouble Codes / Clear Engine & Transmission
DTCs.
2 Follow the instructions on Tech 2 and clear any DTCs.
3 On Tech 2 select: Automatic Transmission / Data Display / Transmission Data.
4 Drive the vehicle in D4 with the TCC on and the throttle above 10%. Ensure Tech 2 displays TCC Slip Speed between -25 to
+25 RPM for 3 seconds.
5 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has DTC P0741 set? Go to Step 2 Go to Step 5
5 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Does Tech 2 display any DTCs you have not diagnosed? Refer to
4.8 Diagnostic Trouble Code List System OK
When all diagnosis and repairs are completed, check the system for correct operation.
4.19 DTC P0742 – Torque Converter Clutch
System – Stuck On
DTC Description
This diagnostic procedure supports DTC P0742 Torque Converter Clutch (TCC) System – Stuck On.
Circuit Description
The torque converter clutch (TCC) solenoid valve is a normally-open exhaust valve that is used with the torque converter
clutch pulse width modulation (TCC PWM) solenoid valve to control fluid acting on the converter clutch apply valve. The
TCC solenoid valve attaches to the transmission case assembly extending into the pump cover. W hen grounded by the
transmission control module (TCM), the TCC solenoid valve stops converter signal oil from exhausting. This causes
converter signal oil pressure to increase and move the converter clutch apply valve against spring force and into the
apply position. In this position, release fluid is open to an exhaust port and converter feed fluid fills the apply fluid circu it.
The converter feed fluid applies the TCC. When the TCM no longer provides a ground path, the TCC solenoid valve de-
energizes and apply fluid exhausts, releasing the TCC.
W hen the TCM detects low torque converter slip when the TCC is commanded off, then DTC P0742 sets. DTC P0742 is
a type B DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
• No DTCs P0722, P0723, P0741 P02763, P02764, P02769 or P02770.
• Ignition voltage is 8 – 18 V.
• The engine run time is greater than 5 seconds.
• The IMS range is D4.
• The transmission fluid temperature is 10 – 130°C.
• The engine speed is 500 – 6,500 r.p.m. for 5 seconds, then 800 – 4,400 r.p.m.
• The engine torque is 156 – 881 Nm.
• The throttle position is greater than 10 percent.
• The transmission is not in 1st gear and the gear ratio is 0.95:1 – 1.56:1.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–70
Step Action Yes No
3 1 Inspect the shift solenoid/hydraulic circuit for the following
conditions:
• Debris or chips in the AFL oil passage.
• Debris or chips restricting oil flow in passage #29 of the
case or through the spacer plate gasket into the valve
body.
• A cracked 2-3 shift solenoid.
• A 2-3 shift valve which is stuck or hung up in the valve
body bore.
• A 2-3 shuttle valve which is stuck or hung up in its bore.
• Damaged seals on the shift solenoid valves. Perform the
shift solenoid leak test, refer to 7C3 Automatic
Transmission – 4L60E – Hydraulic and Mechanical
Diagnosis.
2 Clean and inspect the related valves, bores and the valve body for debris or contamination.
Did you find and correct the condition? Go to Step 4 —
4 Perform the following procedure to verify the repair:
1 On Tech 2 select: Diagnostic Trouble Codes / Clear Engine & Transmission
DTCs
2 Follow the instructions on Tech 2 and clear any DTCs.
3 Drive the vehicle in D4 range under the following conditions, only if traffic and road conditions permit:
• Hold the throttle at 40%, and
• Accelerate to 64 km/h.
4 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has DTC P0756 set? Go to Step 2 Go to Step 5
5 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Does Tech 2 display any DTCs you have not diagnosed? Refer to
4.8 Diagnostic Trouble Code List System OK
When all diagnosis and repairs are completed, check the system for correct operation.
4.23 DTC P0757 – 2-3 Shift Solenoid Valve
Performance – No Third or Fourth Gear
DTC Description
This diagnostic procedure supports DTC P0757 2-3 Shift Solenoid (SS) Valve Performance – No Third or Fourth Gear.
Circuit Description
The 2-3 shift solenoid (SS) valve controls the fluid flow acting on the 2-3 shift valves. The 2-3 SS valve is a normally-
open exhaust valve that is used with the 1-2 SS valve to allow four different shifting combinations.
When the transmission control module (TCM) detects a 1-2-2-1 shift pattern, then DTC P0757 sets. DTC P0757 is a
type A DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–86
Step Action Yes No
14 Perform the following procedure to verify the repair:
1 On Tech 2 select: Diagnostic Trouble Codes / Clear Engine & Transmission
DTCs.
2 Follow the instructions on Tech 2 and clear any DTCs.
3 On Tech 2 select: Automatic Transmission / Data Display / Transmission Data.
4 Operate the vehicle under the following conditions:
• Drive the vehicle in D4, with the TCC on, and a throttle
position at 20%.
• On Tech 2 ensure the TCC Slip Speed is -20 to +50 RPM
for at least 7 seconds.
5 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has DTC P0894 set? Go to Step 2 Go to Step 15
15 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Does Tech 2 display any DTCs you have not diagnosed? Refer to
4.8 Diagnostic Trouble Code List System OK
When all diagnosis and repairs are completed, check the system for correct operation.
4.27 DTC P0961 – Line Pressure Control
Solenoid System Performance
DTC Description
This diagnostic procedure supports DTC P0961 Line Pressure Control (PC) Solenoid System Performance.
Circuit Description
The pressure control (PC) solenoid valve is an electronic device that regulates transmission line pressure based on the
current flow through its coil winding. The magnetic field produced by the coil moves the solenoid's internal valve, which
varies pressure to the pressure regulator valve. The transmission control module (TCM) controls the PC solenoid valve
by applying a varying amount of current to the solenoid. The applied current can vary from 0.1 – 1.1 A. Low current,
0.1 A, indicates high line pressure. High current, 1.1 A, indicates low line pressure. The duty cycle of the PC solenoid
valve is expressed as a percentage of energised on time. Zero percent indicates zero on time, non-energised, or no
current flow. Approximately 60 percent at idle indicates maximum on time, energised, or high current flow. The TCM
determines the appropriate line pressure for a given load by comparing the throttle position, the engine speed and other
inputs.
W hen the TCM detects a continuous open or short to ground in the PC solenoid valve circuit, then DTC P0961 sets.
DTC P0961 is a type C DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
• The system voltage is 8 – 18 V.
• The engine is running.
Conditions for Setting the DTC
The PC solenoid valve duty cycle reaches its high limit, approximately 95 percent, or low limit, approximately 2 percent.
Action Taken When the DTC Sets
• The TCM does not request the engine control module (ECM) to illuminate the MIL.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–108
Step Action Yes No
13 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Does Tech 2 display any DTCs you have not diagnosed? Refer to
4.8 Diagnostic Trouble Code List System OK
When all diagnosis and repairs are completed, check the system for correct operation.
4.33 DTC P2763 – Torque Converter Clutch
Pressure Control Solenoid Control
Circuit High Voltage
DTC Description
This diagnostic procedure supports DTC P2763 Torque Converter Clutch (TCC) Pressure Control (PC) Solenoid Control
Circuit High Voltage.
Circuit Description
The torque converter clutch pulse width modulation (TCC PW M) solenoid valve controls the fluid acting on the converter
clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control
valve body within the transmission. The solenoid receives voltage through ignition voltage circuit. The transmission
control module (TCM) controls the solenoid by providing a ground path on the TCC PW M solenoid valve control circuit.
Current flows through the solenoid coil according to the duty cycle, percentage of on and off time. The TCC PWM
solenoid valve provides a smooth engagement of the TCC by operating during a duty cycle percent of on time.
When the TCM detects a continuous short to voltage in the TCC PW M solenoid valve control circuit, then DTC P2763
sets. DTC P2763 is a type A DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
• The system voltage is 8 – 18 V.
• The engine speed is 500 r.p.m. for 5 seconds.
Conditions for Setting the DTC
DTC P2763 sets if the TCM commands the solenoid on and the voltage feedback remains high, battery voltage.
Action Taken When the DTC Sets
• The TCM requests the ECM to illuminate the MIL during the second consecutive trip in which the conditions for
setting the DTC are met.
• The TCM commands maximum line pressure.
• The TCM freezes transmission adaptive functions.
• The TCM inhibits TCC engagement.
• The TCM inhibits 4th gear if in hot mode.
• At the time of the first failure, the TCM records the operating conditions when the conditions for setting the DTC are
met. The TCM stores this information as a Failure Record.
• At the time of the second failure, the ECM records the operating conditions when the conditions for setting the DTC
are met. The ECM stores this information as a Freeze Frame.
• The TCM stores DTC P2763 in TCM history during the second consecutive trip in which the conditions for setting
the DTC are met.
Conditions for Clearing the DTC
• The ECM turns off the MIL after the fourth consecutive drive trip in which the TCM does not send a MIL illumination
request.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–111
4.34 DTC P2764 – Torque Converter Clutch
Pressure Control Solenoid Control
Circuit Low Voltage
DTC Description
This diagnostic procedure supports DTC P2764 Torque Converter Clutch (TCC) Pressure Control (PC) Solenoid Control
Circuit Low Voltage.
Circuit Description
The torque converter clutch pulse width modulation (TCC PW M) solenoid valve controls the fluid acting on the converter
clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control
valve body within the transmission. The solenoid receives voltage through ignition voltage circuit. The transmission
control module (TCM) controls the solenoid by providing a ground path on the TCC PW M solenoid valve control circuit.
Current flows through the solenoid coil according to the duty cycle, percentage of on and off time. The TCC PWM
solenoid valve provides a smooth engagement of the TCC by operating during a duty cycle percent of on time.
W hen the TCM detects a continuous open or short to ground in the TCC PW M solenoid valve control circuit, then
DTC P2764 sets. DTC P2764 is a type A DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
• The system voltage is 8 – 18 V.
• The engine speed is 500 r.p.m. for 5 seconds.
Conditions for Setting the DTC
DTC P2764 sets when either of the following conditions occurs for 5 seconds:
• The TCM detects an open in the TCC PWM shift solenoid valve circuit when the TCC PW M is commanded on.
• The TCM detects a short to ground in the TCC PWM shift solenoid valve circuit when the TCC PWM is
commanded on.
Action Taken When the DTC Sets
• The TCM requests the ECM to illuminate the MIL during the second consecutive trip in which the Conditions for
Setting the DTC are met.
• The TCM commands maximum line pressure.
• The TCM freezes transmission adaptive functions.
• The TCM inhibits TCC engagement.
• The TCM inhibits 4th gear if in hot mode.
• At the time of the first failure, the TCM records the operating conditions when the conditions for setting the DTC are
met. The TCM stores this information as a Failure Record.
• At the time of the second failure, the ECM records the operating conditions when the conditions for setting the DTC
are met. The ECM stores this information as a Freeze Frame.
• The TCM stores DTC P2764 in TCM history during the second consecutive trip in which the conditions for setting
the DTC are met.
Conditions for Clearing the DTC
• The ECM turns off the MIL after the fourth consecutive drive trip in which the TCM does not send a MIL illumination
request.
• Tech 2 can clear the DTC.
• The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission
related diagnostic fault occurring.

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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–5
2 Maintenance Operations
2.1 Transmission Fluid
When adding or changing the transmission fluid, use only the recommended automatic transmission fluid, refer to
0B Maintenance and Lubrication.
For the automatic transmission fluid diagnosis, refer to 7C3 Automatic Transmission – 4L60E – Hydraulic and
Mechanical Diagnosis.
Transmission Fluid Colour
New transmission fluid is red in colour due to a dye that is added to the fluid so it can be distinguished from other oils and
lubricants. The red dye is not permanent and as such, is not an indicator of the quality of the fluid.
As the vehicle is driven the transmission fluid will quickly look darker in colour and appear to be a light brown. A dark
brown colour with a distinctively burnt odour may indicate fluid deterioration and the need for fluid replacement.
NOTE
A dark brown fluid colour observed, coupled with
a reported delayed shift pattern may only indicate
that fluid replacement is required. This is not a
definite indication of a potential transmission
failure.
Transmission Fluid Level
NOTE
Carry out this operation with the transmission at
normal operating temperature (82 – 94°C), as the
temperature greatly affects the fluid level.
1 Drive the vehicle for a distance of at least 25 km to bring the transmission up to normal operating temperature.

If the transmission is not at normal operating
temperature and the correct procedure is not
followed, the result could be a false reading of
the fluid level on the transmission fluid
indicator.
2 If the vehicle has been operated under any of the following conditions, switch the engine off and allow the transmission to cool for approximately thirty minutes:
• in high ambient temperatures above 32° C,
• at sustained high speeds,
• in heavy stop / start city traffic during hot weather, or
• towing.
3 Park the vehicle on level ground.
4 Move the gear selector to the Park position and apply the park brake.
5 Allow the engine to idle for 3 minutes with the accessories turned off.

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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–45

Support the transmission when removing the
attaching bolts to avoid damage to the torque
converter and flexplate. Do not have the
transmission hanging.
NOTE
The bolts attaching the torque converter housing
are facing forward except for the bolt in position ℑ

which is facing rearward.
16 W ith the transmission supported, using a long socket extension, universal joint and suitable size socket, remove the bolt (1), nine places, attaching the torque converter housing to the engine, in the reverse order of the torque
sequence shown in
within Figure 7C4 – 62.

The transmission assembly must not be
allowed to rest on its oil pan.
17 Support the transmission assembly on a suitable cradle and secure it. Place a suitable support under the engine oil pan rail to support the engine after the transmission has been removed.
18 Remove the transmission assembly, disengaging the filler tube attached to the engine.
19 Remove the bolt (3) and torque converter cover (4) on the transmission right-hand side, remove the bolt (5) and torque converter cover (6) on the transmission left-hand side.
20 Install a suitable holding tool to prevent the torque converter from becoming dislodged.
21 If required on 4W D vehicle, remove the transfer case, refer to 7D Transfer Case and Adaptor Housing.

Figure 7C4 – 62

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