2007 ISUZU KB P190 Alternator
[x] Cancel search: AlternatorPage 3513 of 6020
Engine Management – V6 – Diagnostics Page 6C1-2–235
Vehicle Speed km/h 0 0
Brake Lamp Switch Inactive / Active Inactive Inactive
Brake Switch Signal Status Valid / Invalid Valid Valid
Initial Brake Apply Signal Inactive / Active Inactive Inactive
Calculated Pedal Position % 0 0
Desired Throttle Position % 4 1
Calculated Throttle Position % 5 1
Engine Speed RPM 0 599
(1) Actual Gear -1- / -2- / -3- / -4- / -
5- / -P/N- / -R- / -Invalid- -P/N- -P/N-
Cruise Control Disengagement Reason Units
Brake / Cancel / Clutch Diseng / Coasting / Throttle Control / Max. Acceleration / High Decel / High Speed / Illegal
Mode / Low Speed / Not Present / Off / OverSpeed / PCM / Command Error / Ignition Off / Data Error / System Error /
Engine Runtime / Engine Speed / DTCs Set / Injection Stop / First Gear / Accel Pedal Pos / Voltage Low / Manual
Neutral / Over Limit
(1) Automatic Transmission Only (2) Manual Transmission Only
Electrical/Theft Data
Tech 2 Display Units Displayed Ignition On Engine Running
Ignition On Signal Off / On On On
Ignition Accessory Signal Off / On On On
Engine Control Ignition Relay Off / On On On
Engine Control Ignition Relay Feedback V 11.6 14.2
Crank Request Inactive / Active Inactive Inactive
Starter Relay Off / On Off Off
(1) Transmission Gear P/N / In Gear P-N P-N
(1) Actual Gear -1- / -2- / -3- / -4- / -
5- / -P/N- / -R- / -Invalid- -P/N- -P/N-
1) Actual Gear
Valid / Invalid Valid
Valid
Alternator L Terminal Duty Cycle % 0 99
Engine Speed RPM 0 599
ECM Immobilized No / Yes No No
(1) Automatic Transmission Only (2) Manual Transmission Only
Instrument Data
Tech 2 Display Units Displayed Ignition On Engine Running
Ignition On Signal Off / On On On
Ignition Accessory Signal Off / On On On
Vehicle Speed km/h 0 0
Engine Speed RPM 0 593
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3516 of 6020
Engine Management – V6 – Diagnostics Page 6C1-2–238
B2 Average Injection Time (Bank 2) ms 0.0 1.9
Mass Air Flow Sensor V 1.0 1.1
Mass Air Flow g/s 0.00 2.92
Power Enrichment No / Yes No No
Spark Advance °CA 0 13
Calculated Throttle Position % 5 1
Vehicle Speed km/h 0 0
Volumetric Efficiency % 99 13
(1) Automatic Transmission Only (2) Manual Transmission Only
8.4 Tech 2 Data Definitions
NOTE
This listing is arranged in alphabetical order and
defines each parameter shown in the Data Lists.
A/C Cutoff Mode (Air Conditioning): This parameter displays whether the control module is commanding the A/C
compressor clutch relay OFF for a number of reasons, among which is; operating pressure outside given parameters or
throttle position at wide open throttle (W OT).
A/C Disengagement 1 – 8 History: The parameter displays the last 8 air conditioning (A/C) compressor disengages in
order from 1 to 8 with 8 being the most recent. There are 8 possible causes listed for the A/C compressor to disengage;
High Pressure, Engine Speed, Battery Voltage, Stall Prevention, Full Load, Performance, Engine Temperature or Signal
not Present. Any of these causes need to be outside calibrated values, to cause the A/C to disengage.
A/C Pressure Sensor (Air Conditioning): This parameter displays the voltage from the A/C high side pressure sensor
signal circuit to the control module.
A/C Pressure Sensor (Air Conditioning): This parameter displays the pressure in kPa from the A/C high side pressure
sensor signal circuit to the control module.
A/C Relay (Air Conditioning): This parameter displays the state of the A/C clutch relay control circuit, either as ‘ON’ or
‘OFF’.
A/C Relay Status: This parameter displays the state of the A/C request input to the control module from the heating,
ventilation, and air conditioning (HVAC) controls.
A/C Request: Represents the commanded state of the A/C clutch control relay. Clutch should be engaged when ON is
displayed.
Actual Gear: This parameter displays the transmission range input to the control module, determined directly from the
decoding of the PRNDL – A, B, C, and P inputs from the transmission internal mode switch (IMS).
Actual Gear: Based on the evaluation of the PRNDL – A, B, C, and P inputs, the ECM determines whether the
parameter is valid or invalid.
Actual Intake Camshaft Position (Bank 1 or Bank 2): This parameter displays the actual intake camshaft position in
degrees of crankshaft angle.
Alternator L Terminal Duty Cycle: This parameter displays the ECM commanded state of the voltage regulator on the
alternator, expressed as a percentage from 0 to 100.
APP Sensor 1 (Accelerator Pedal Position): This parameter displays the actual voltage on the APP sensor 1 signal
circuit as measured by the ECM, that can range from 0.9 – 4.5 volts.
APP Sensor 2 (Accelerator Pedal Position): This parameter displays the actual voltage on the APP sensor 1 signal
circuit as measured by the ECM, that can range from 0.45 – 2.25 volts.
APP Sensor 1 and 2 Correlation (Accelerator Pedal Position): This parameter displays ‘Okay’ under normal
operating conditions or ‘Fault’ if the control module detects the signal voltage from APP sensor 1 that is not in the
correct relationship to APP sensor 2.
Average Injection Time (Bank 1 or Bank 2): This parameter displays the average pulse width of the fuel injectors for
each bank of the engine as determined by the ECM.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3522 of 6020
Engine Management – V6 – Diagnostics Page 6C1-2–244
Precondition: Ignition ‘On’.
Cooling Fan (PWM)
Take care that no-one can access the engine
compartment during these tests!
This test allows the Technician to turn the cooling fan on in increments to its maximum speed.
Precondition: Ignition ‘On’ Air conditioning is ‘Off’..
Alternator L Terminal
This test allows the Technician to turn ‘On’ and ‘Off’, the commanded state of the voltage regulator in the alternator. ‘On’
displays a commanded state of 99%, while ‘Off’ displays a commanded state of 0%.
Precondition: Engine running.
EVAP Purge Solenoid
This test allows the Technician to control the EVAP purge solenoid valve. The normal commanded state is ‘0%’. The
system will increase or decrease the amount of purge by changing the duty cycle of the purge valve in 10% increments
within a range of 0 – 100%. The system will remain in the commanded state until cancelled by Tech 2.
NOTE
The EVAP Purge Solenoid Command parameter
may not change states when using this output
control.
Precondition: Ignition ‘On’, engine ‘Off’.
Engine Speed Control
Other DTCs may set when the Engine Speed
Control function is used. Disregard those
DTCs that set under this condition.
Allows the increase / decrease of the engine speed in 20 – 30 rpm increments from the base idle speed, up to 1,600
rpm.
NOTE
If the engine coolant temperature is below the
prescribed minimum, a message to that effect is
displayed and access to engine speed control is
blocked.
Preconditions: Engine running, engine temperature above 80 °C, transmission in Park or Neutral.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3588 of 6020
Charging System – V6 Page 6D1-1-1
6D1-1
Charging System – V6
ATTENTION
Before performing any service operations or other procedure described in this Section, refer to
1.2 WARNING, CAUTION and NOTES for correct workshop practices with regard to safety and / or
property damage.
1 General Information ............................................................................................................ ...................3
1.1 Components ........................................................................................................................................................... 3
Generator................................................................................................................................................................ 3
Generator Types ................................................................................................................................................ 3
Voltage Regulator .................................................................................................................................................. 4
1.2 WARNING, CAUTION and NOTES..................................................................................................... .................... 4
Definition of WARNING, CAUTION and NOTE Statements............................................................................. .... 4
W ARNING defined ............................................................................................................................................. 4
CAUTION defined .............................................................................................................................................. 5
NOTE defined .................................................................................................................................................... 5
1.3 System Operation .................................................................................................................................................. 5
Operation ........................................................................................................................................................... 5
Alternator W arning ............................................................................................................. ................................ 6
2 Diagnosis ................................................................................................................................................7
2.1 Diagnostic General Information ........................................................................................................................... 7
Basic Diagnostic Tools Required ................................................................................................ ......................... 7
2.2 Tech 2 Data List ..................................................................................................................................................... 7
2.3 Diagnostic Systems Check ....................................................................................................... ............................ 7
2.4 Wiring Diagram ...................................................................................................................................................... 8
2.5 Charging System Inoperative / Malfunctioning ................................................................................................... 9
Diagnostic Table Notes ......................................................................................................... ............................. 9
Diagnostic Table 120A Generator ................................................................................................ ...................... 9
3 Minor Service Operations ....................................................................................................................10
3.1 Safety Precautions............................................................................................................................................... 10
3.2 Maintenance ......................................................................................................................................................... 10
Regular Checks................................................................................................................. ................................... 10
Lubrication ....................................................................................................................................................... 10
3.3 On-vehicle Testing ............................................................................................................. .................................. 11
Generator On-vehicle Checks.................................................................................................... ......................... 11
Prerequisites .................................................................................................................................................... 11
Generator Test ................................................................................................................................................. 11
Charging Circuit Voltage Drop Test ............................................................................................. ...................... 13
Prerequisites .................................................................................................................................................... 13
Voltage Drop Test ............................................................................................................................................ 13
4 Major Service Operations ....................................................................................................................15
4.1 Generator.............................................................................................................................................................. 15
Remove ................................................................................................................................................................. 15
Reinstall ................................................................................................................................................................ 16
4.2 Generator Mounting Bracket ..................................................................................................... ......................... 17
Remove ................................................................................................................................................................. 17
Reinstall ................................................................................................................................................................ 17
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3593 of 6020
Charging System – V6 Page 6D1-1-6
Alternator Warning
NOTE
All generator faults are displayed as
Check Alternator W arning on the instrument
cluster MFD, refer to 8A Electrical Body and
Chassis.
The ECM monitors the voltage on connector E-60 pin 21 and pin 43.
The voltage at the generator connector E-4 pin 2 will remain low when a fault condition is detected in the generator or
associated external circuits. The voltage remains low (while the ignition switch is on) until the fault is repaired.
NOTE
For more information on the alternator warning
refer to 8A Electrical Body and Chassis.
Fault conditions include the following:
• open circuit or excessive voltage drop in circuit 1,
• open circuit in the generator phase connection,
• overcharging conditions,
• short circuit in the regulator output stage,
• open circuit in the rotor winding,
• poor contact between the rectifier and the regulator, and / or
• high resistance in the fusible link assembly.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3594 of 6020
Charging System – V6 Page 6D1-1-7
2 Diagnosis
2.1 Diagnostic General Information
Basic Diagnostic Tools Required
Use of incorrect electrical circuit diagnostic
tools when performing the generator
diagnostic procedures could result in
incorrect diagnostic results or damage to
components.
The following electrical circuit testing tools are required to perform the diagnostic procedures detailed in this Section:
• digital multimeter with 10 mega ohms impedance, and
• connector test adapter kit Tool No. KM609.
For further information on the use of these tools, refer to 8A Electrical Body and Chassis.
2.2 Tech 2 Data List
The Tech 2 displays the status of certain charging system parameters.
To view the data list:
1 Connect Tech 2 to the DLC.
2 On Tech 2 select: Engine / V6 Engine / Data Display / Data List / Electrical/Theft Data .
Tech 2 Parameter Units Displayed Typical Display Values
Alternator L Terminal D Percentage Various
2.3 Diagnostic Systems Check
Step Action Yes No
1 1 Connect Tech 2 to the DLC.
2 Ignition ON, engine OFF.
3 On Tech 2 select: Engine / V6 Engine / Diagnostic Trouble codes / Read
DTC’s.
Are there any set DTC’s? Go to the
appropriate DTC table in 6C1-2 Engine
Management – V6 – Diagnostics. Refer to 2.5
Charging
System Inoperative / Malfunctioning
Reference to following information will assist when diagnosing charging circuit faults:
• for battery testing, refer to 6D1-3 Battery – V6,
• for wiring diagram details, refer to Figure 6D1-1 2, and
• for electrical component locations, refer to 8A Electrical Body and Chassis.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3742 of 6020
Powertrain Interface Module – V6 Page 6E1–81
13.3 Powertrain Interface Module Data List
Diagnostic Data Display
Tech 2 Display Units Displayed Switch On Switch Off
AC Switch On/Off On Off
Cruise Cancel Switch Active/Inactive Active Inactive
Cruise Resume Switch Active/Inactive Active Inactive
Cruise Set Switch Active/Inactive Active Inactive
Cruise Main Switch Active/Inactive Active Inactive
Cruise Control Set Lamp On/Off On Off
Cruise Control On Lamp On/Off On Off
Power Drive Switch On/Off On Off
Power Drive Lamp On/Off On Off
3rd Start Switch On/Off On Off
3rd Start Lamp On/Off On Off
4W D Low Gear Active/Inactive Active Inactive
G-Sensor V 2.43 2.43
G-Sensor Pa 0.027 0.027
Engine Speed RPM 152 1093
Coolant temperature Input °C 35 25
Coolant Temperature % 70 70
Fuel Level Input % 26 26
Fuel Level % 43 43
Alternator Lamp On/Off On Off
Oil Pressure Lamp On/Off On Off
SVS Lamp (Service Vehicle soon) On/Off On Off
Check transmission MIL On/Off On Off
Transmission Oil Temperature Lamp On/Off On Off
LED [ - P - ] On/Off On Off
LED [ - R - ] On/Off On Off
LED [ - N - ] On/Off On Off
LED [ - D - ] On/Off On Off
LED [ - 3 - ] On/Off On Off
LED [ - 2 - ] On/Off On Off
LED [ - 1 - ] On/Off On Off
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007
Page 3743 of 6020
Powertrain Interface Module – V6 Page 6E1–82
13.4 Miscellaneous Tests
F0: Warnings
F0: Alternator
This test checks the alternator warning lamp turns On and Off when selected on Tech 2.
F1: Oil Pressure Telltale Test
This test checks the Oil Pressure warning lamp turns On and Off when selected on Tech 2.
F2: Service Vehicle Soon Lamp Test
This test checks the Service Vehicle Soon warning lamp turns On and Off when selected on Tech 2.
F3: AT Oil Temperature Lamp
This test checks the Oil Temperature warning lamp turns On and Off when selected on Tech 2.
F4: AT Telltale Test
This test checks the Automatic Transmission warning lamp turns On and Off when selected on Tech 2.
F1: Status Indicators
F0: Cruise Control On Lamp
This test checks the Cruise Control On status lamp turns On and Off when selected on Tech 2.
F1: Cruise Control Set Lamp
This test checks the Cruise Control Set status lamp turns On and Off when selected on Tech 2.
F2: PRNDL Lamps
This test checks the all the Automatic Transmission status lamps turn On and Off when selected on Tech 2.
F3: Power Drive Lamp
This test checks the Power Drive status lamp turns On and Off when selected on Tech 2.
F2: Gauge Control Tests
F0: Tachometer
This test checks the operation of the Tachometer by driving the pointer in 1000 rpm steps to 6000 rpm when
selected on Tech 2.
F1: Temperature Gauge
This test checks the operation of the Temperature gauge by driving the pointer to the Cold, Mid and High
positions when selected on Tech 2.
F2: Fuel Gauge
This test checks the operation of the Fuel gauge by driving the pointer from zero in 20% increments to full when selected on Tech 2.
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007