2007 ISUZU KB P190 oil temperature

Engine Management – V6 – Diagnostics Page 6C1-2–41


Figure 6C1-2 – 11
Legend
1 Fuel Injector Tester – Special Tool J39021
2 Digital Multimeter
3 Fuel Injector Harness Adapter – Special Tool J44602 4 To Battery Positive Terminal
5 Battery Earth


Fuel Injector Coil Test Example – Engine Coolant Temperature 10 – 32 °
°°
°
C (Typical Values Shown)
Fuel Injector No. Voltage Reading Pass / Fail (acceptable range 5.5 - 6.6 V)
1 6.6 Pass
2 5.4 Fail
3 6.2 Pass
4 6.1 Pass
5 6.7 Fail
6 6.0 Pass
Figure 6C1-2 – 12
Fuel Injector Coil Test Example – Engine Coolant Temperature Greater / Less Than 10 – 32 °
°°
°
C (Typical Values
Shown)
Fuel Injector No. Voltage Reading Highest Voltage Reading (9.5 V or less) Subtracted Value
(acceptable voltage 0.6 V) Pass / Fail
1 9.8 – – Fail
2 6.4 7.0 0.6 Pass
3 6.9 7.0 0.1 Pass
4 5.8 7.0 1.2 Fail
5 7.0 7.0 0.0 Pass
6 6.3 7.0 0.7 Fail
Figure 6C1-2 – 13

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–42

6.3 Fuel Injector Balance Test

To avoid irregular fuel pressure readings, do
not perform this procedure if the engine
coolant temperature is greater than 94 °
°°
°
C.
Fuel Injector Balance Test – With Tech 2
1 Check the engine coolant temperature is less than 94 °C.
2 Perform the fuel injector coil test and replace any fuel injectors that are not functioning correctly before proceeding. Refer to 6.2 Fuel Injector Coil Test.
3 Perform the fuel system pressure check and ensure the fuel system is functioning correctly before proceeding with the fuel injector balance test. Refer to 6C Fuel System – V6.
4 W hile the fuel pressure gauge is still connected to the fuel pressure test point, pressurise the fuel system. Refer to 6C Fuel System – V6.
5 W hen the fuel pressure reading stabilises, record the fuel pressure reading indicated by the fuel pressure gauge.
NOTE
The fuel pressure reading taken in Step 5 is
known as the first pressure reading.
6 Connect Tech 2 to the data link connector (DLC) and turn the ignition on.
7 On Tech 2 select Engine / V6 Engine / Actuator Test / Fuel Injector Balance .
8 Follow the Tech 2 prompts, recording the fuel pressure gauge reading for each injector.
NOTE
The fuel pressure readings taken in Step 8 are
known as the second pressure reading
9 Perform the Fuel Injector Pressure Drop Calculation in this Section.
Fuel Injector Balance Test – Without Tech 2
1 Check the engine coolant temperature is less than 94 °C.
2 Perform the fuel injector coil test and replace any fuel injectors that are not functioning correctly before proceeding. Refer to 6.2 Fuel Injector Coil Test.
3 Perform the fuel system pressure check and ensure the fuel system is functioning correctly before proceeding with the fuel injector balance test. Refer to 6C Fuel System – V6.
4 W hile the fuel pressure gauge is still connected to the fuel pressure test point, pressurise the fuel system. Refer to 6C Fuel System – V6.
5 W hen the fuel pressure reading stabilises, record the fuel pressure reading indicated by the fuel pressure gauge.
NOTE
The fuel pressure reading taken in Step 5 is
known as the first pressure reading.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–47

6.7 Throttle Body Relearn
A throttle body relearn procedure is performed in one of two ways:
• Engine Control Module initiated throttle body relearn, or
• Tech 2 initiated throttle body relearn.
Engine Control Module Throttle Body Relearn
The engine control module (ECM) will automatically perform a throttle body relearn procedure if either of the following
conditions exist:
• The battery has been disconnected, or
• The ignition switch is in the ON position for greater than 29 seconds, and the following conditions are met:
− Engine speed is less than 40 rpm,
− Vehicle speed is 0 km/h,
− Engine coolant temperature is 5 – 60°C,
− Intake air temperature is 5 – 60°C,
− Accelerator pedal position sensor angle is less than 14.9%, and
− Ignition voltage is greater than 10 V.
Tech 2 Throttle Body Relearn
To perform a throttle body relearn using Tech 2, complete the following procedure:
NOTE
Tech 2 will not initiate a throttle body relearn if
the engine is running.
1 Connect Tech 2 to the data link connector (DLC) and turn the ignition on.
2 On Tech 2 select Engine / Programming / Throttle Body Relearn.
3 W hen Tech 2 displays ‘Do you really want to Reset?’, press the ‘Yes’ soft key.
4 W hen Tech 2 displays ‘Programming Completed’, and the electronic throttle control value displayed by Tech 2 is ‘11’, press the ‘Confirm’ soft key to return to the Tech 2 Programming screen.
5 The throttle body relearn is now complete.
6.8 Electronic Ignition (EI) System Diagnosis
Circuit Description
The engine control module (ECM) controls the ignition coils by pulsing the ignition control (IC) circuits, which triggers an
ignition coil and fires the spark plug. The ECM controls the sequencing and the timing of each ignition coil. The ignition
system consist of the following components:
• The six ignition coils
• The crankshaft position (CKP) sensor
• The four camshaft position (CMP) sensors
• The ECM
The ignition coils use the following circuits:
• An IC circuit
• An ignition 1 voltage circuit
• Two ground circuits

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–48

Additional Information
• Use the J 35616-B Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a
component harness connector.
• Inspect the ignition coils for aftermarket devices. An aftermarket device connected to the ignition coil circuits, may
cause a condition with the ignition coils.
• For an intermittent fault condition, refer to 5.2 Intermittent Fault Conditions in this Section.
• To assist diagnosis, refer to 3 W iring Diagrams and Connector Charts in this Section, for the system wiring
diagram and connector charts.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
4 The ignition coils for each bank are fused separately. If a fuse opens or the ignition 1 voltage circuit opens between the fuse and the splice, all the ignition coils for one bank of the engine would be inoperative. If the ground
circuit opens at the engine block, the ignition coils would be inoperative for one bank of the engine.
5 This step tests for an open or a high resistance in the ignition 1 voltage circuit of the ignition coil. If the DMM does not display near battery voltage there is an open or a high resistance in the circuit.
6 This step determines if the ground circuit is open. If the circuit is open, the ignition coils would be inoperative for one bank of the engine.
7 This step determines if the ignition 1 voltage circuit is shorted to ground. If the fuse is open, the ignition coils would be inoperative for one bank of the engine.
Diagnostic Table
Step Action Value(s) Yes No
1
Has the Diagnostic System Check been performed? —
Go to Step 2 Refer to
4.4 Diagnostic System Check
2 W ere you sent here from DTC P0300 or P0301-P0306? —
Go to Step 3 Go to DTC P0300 or
DTC P0301 – P0306
3 1 Start the engine.
2 Allow the engine to reach operating temperature.
3 Operate the engine at 2,000 rpm.
4 Monitor all of the Misfire Current Counters with a scan tool. There are a total of 6 counters,
1 counter per cylinder.
Are any of the Misfire Current Counters incrementing? —
Go to Step 4 Go to
5.2 Intermittent Fault Conditions
4 Are all the misfire counters incrementing for one bank
of the engine? —
Go to Step 7 Go to Step 5
5 1 Ignition OFF.
2 Disconnect the appropriate ignition coil.
3 Ignition ON, engine OFF.
4 Connect a test lamp between the battery voltage circuit of the ignition coil and a good ground.
5 Measure the voltage between the probe of the test lamp and a good ground with a DMM. Refer
to 8A Electrical - Body and Chassis for the
procedure to measure voltage drop.
Is the voltage at the specified value? B+
Go to Step 6 Go to Step 9

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–53

DTC Description Diagnostic Table
P0196 Engine Oil Temperature Sensor Range / Performance 7.13 DTC P0196, P0197 or P0198
P0197 Engine Oil Temperature Voltage Low 7.13 DTC P0196, P0197 or P0198
P0198 Engine Oil Temperature Voltage High 7.13 DTC P0196, P0197 or P0198
P0201 Injector 1 Control Circuit Malfunction 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0202 Injector 2 Control Circuit Malfunction 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0203 Injector 3 Control Circuit Malfunction 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0204 Injector 4 Control Circuit Malfunction 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0205 Injector 5 Control Circuit Malfunction 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0206 Injector 6 Control Circuit Malfunction 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0219 Engine Overspeed Condition 7.15 DTC P0219
P0221 Throttle Position Sensor 2 Circuit Range / Performance 7.9 DTC P0121, P0122, P0123, P0221,
P0222,or P0223
P0222 Throttle Position Sensor 2 Circuit Low Voltage 7.9 DTC P0121, P0122, P0123, P0221,
P0222,or P0223
P0223 Throttle Position Sensor 2 Circuit High Voltage 7.9 DTC P0121, P0122, P0123, P0221,
P0222,or P0223
P0261 Injector 1 Control Circuit Low Voltage 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0262 Injector 1 Control Circuit High Voltage 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0264 Injector 2 Control Circuit Low Voltage 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0265 Injector 2 Control Circuit High Voltage 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277
P0267 Injector 3 Control Circuit Low Voltage 7.14 DTC P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264,
P0265, P0267, P0268, P0270, P0271,
P0273, P0274, P0276 or P0277

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–56

DTC Description Diagnostic Table
P0522 Oil Pressure Sensor Voltage Low 7.31 DTC P0521, P0522 or P0523
P0523 Oil Pressure Sensor Voltage High 7.31 DTC P0521, P0522 or P0523
P0532 A/C Pressure Sensor Voltage Low 7.32 DTC P0532 or P0533
P0533 A/C Pressure Sensor Voltage High 7.32 DTC P0532 or P0533
P0560 System Voltage Malfunction 7.33 DTC P0560, P0562 or P0563
P0562 System Voltage Low Voltage 7.33 DTC P0560, P0562 or P0563
P0563 System Voltage High Voltage 7.33 DTC P0560, P0562 or P0563
P0571 Cruise Control Brake Switch Circuit 7.28 DTC P0504 or P0571
P0601 Replace Electronic Control Unit (ECU) 7.34 DTC P0601, P0602, P0604 or P0606
P0602 Program Electronic Control Unit (ECU) 7.34 DTC P0601, P0602, P0604 or P0606
P0604 Replace Electronic Control Unit (ECU) 7.34 DTC P0601, P0602, P0604 or P0606
P0606 Replace Electronic Control Unit (ECU) 7.34 DTC P0601, P0602, P0604 or P0606
P0615 Starter Relay Circuit Malfunction 7.35 DTC P0615, P0616 or P0617
P0616 Starter Relay Circuit Low Voltage 7.35 DTC P0615, P0616 or P0617
P0617 Starter Relay Circuit High Voltage 7.35 DTC P0615, P0616 or P0617
P0625 Alternator F Terminal Low Voltage 7.36 DTC P0625 or P0626
P0626 Alternator F Terminal High Voltage 7.36 DTC P0625 or P0626
P0627 Fuel Pump Relay Circuit Malfunction 7.37 DTC P0627, P0628 or P0629
P0628 Fuel Pump Relay Voltage Low 7.37 DTC P0627, P0628 or P0629
P0629 Fuel Pump Relay Voltage High 7.37 DTC P0627, P0628 or P0629
P0633 Immobiliser Function Not Programmed 7.30 DTC P0513, P0633, P1629, P1632,
P1677, P1678 or P1679
P0638 Commanded Versus Actual Throttle Position Correlation 7.29 DTC P0506, P0507, P0638, P1551, P2100, P2101, P2119 or P2176
P0645 A/C Relay Circuit Malfunction 7.38 DTC P0645, P0646 or P0647
P0646 A/C Relay Voltage Low 7.38 DTC P0645, P0646 or P0647
P0647 A/C Relay Voltage High 7.38 DTC P0645, P0646 or P0647
P0685 Engine Control Ignition Relay Circuit Malfunction 7.39 DTC P0685, P0686 or P0687
P0686 Engine Control Ignition Relay Circuit Low Voltage 7.39 DTC P0685, P0686 or P0687
P0687 Engine Control Ignition Relay Circuit High Voltage 7.39 DTC P0685, P0686 or P0687
P0691 Cooling Fan Relay 1 Circuit Low Voltage 7.26 DTC P0480, P0691 or P0692
P0692 Cooling Fan Relay 1 Circuit High Voltage 7.26 DTC P0480, P0691 or P0692
P0700 Malfunction Indicator (MI) Request from Transmission
Control Module (TCM) 7.40 DTC P0700
P0704 Clutch Switch Input Circuit Malfunction
7.41 DTC P0704
P0850 Park / Neutral Signal Circuit Incorrect Signal 7.42 DTC P0850
P1258 Engine Coolant Over Temperature – Protection Mode
Active 7.8 DTC P0116, P0117, P0118, P0125 or
P1258
P1551 Throttle Control Lower Position Not Reached during Learning Mode 7.29 DTC P0506, P0507, P0638, P1551,
P2100, P2101, P2119 or P2176

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–61

• DTCs P0341, P0342, P0343, ran and passed:
• The engine is running.
• The ECM has learned the camshafts position.
DTC P0016
Run continuously once the following conditions are met.
• DTCs P0335, P0336, P0338, P0341, P0342 and P0343 ran and passed:
• The calculated engine oil temperature is less than 95 °C.
• The engine coolant temperature is 20 – 90 °C.
• The engine is running for greater than 5 seconds.
Conditions for Setting the DTC
DTC P0008
The ECM detects that both camshafts on bank 1 of the engine are misaligned with the crankshaft.
DTC P0009
The ECM detects that both camshafts on bank 2 of the engine are misaligned with the crankshaft.
DTC P0016
The ECM detects the following deviation in the correlation between the camshaft position and the crankshaft position for
greater than 10 minutes:
• a camshaft position is too advanced in relationship to the crankshaft, or
• a camshaft position is too retarded in relationship to the crankshaft.
Conditions for Clearing DTC
The CKP / CMP sensor correlation DTCs are Type B DTCs. Refer to 1.4 Diagnostic Trouble Codes in this Section, for
action taken when Type B DTCs set and conditions for clearing Type B DTCs.
Additional Information
• Refer to 6C1-1 Engine Management – V6 – General Information for details of the CMP system operation.
• Inspect the engine for recent engine mechanical repairs. Incorrect camshaft, camshaft actuator or timing chain
installation will trigger these DTCs.
• The engine oil condition has a major impact on the operation of the camshaft actuator.
• A low oil level may set these DTCs.
• For an intermittent fault condition, refer to 5.2 Intermittent Fault Conditions in this Section.
• Since fault condition in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic
procedure for shorted terminals or poor wiring connection before replacing any component. Refer to 8A Electrical -
Body and Chassis for information on electrical fault diagnosis.
• To assist diagnosis, refer to 3 W iring Diagrams and Connector Charts in this Section, for the system wiring
diagram and connector charts.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
3 A fault condition in any of the listed sensors will trigger these DTCs.
5 Incorrect camshaft, camshaft actuator or timing chain installation will trigger these DTCs.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–95

16 1 Using Tech 2, select the DTC display function.
Does Tech 2 display any DTCs? —
Go to the
appropriate DTC Table in this Section System OK
When all diagnosis and repairs are completed, clear all DTCs and verify correct operation
7.13 DTC P0196, P0197 or P0198
DTC Descriptors
This diagnostic procedure supports the following DTCs:
• DTC P0196 – Engine Oil Temperature Sensor Range / Performance
• DTC P0197 – Engine Oil Temperature Voltage Low
• DTC P0198 – Engine Oil Temperature Voltage High
Circuit Description
The ECM applies a positive 5 V reference voltage to the engine oil temperature (EOT) sensor through the 5 V reference
circuit and the ground through the low reference circuit.
The EOT sensor is a variable resistor that measures the temperature of the engine oil. This sensor provides signal
voltage to the ECM that is proportional to the oil temperature off the engine.
The ECM monitors and compares the EOT sensor signal voltage against a specified range. An EOT sensor circuit DTC
sets if the ECM detects the EOT sensor signal voltage is outside the specified range.
Conditions for Running the DTC
DTC P0196, P0197 and P0198 run continuously when the engine is running.
Conditions for Setting the DTC
DTC P0196
The ECM detects the engine oil temperature sensor is not within 100 °C of the modelled temperature
NOTE
The modelled temperature is the temperature
that the ECM expects to see given current engine
operating conditions.
DTC P0197
The ECM detects the engine oil temperature is less than -35 °C for longer than 3 seconds.
DTC P0198
The ECM detects the engine oil temperature is greater than 170 °C for longer than 3 seconds.
Conditions for Clearing DTC
The EOT sensor circuit DTCs are Type C DTCs. Refer to 1.4 Diagnostic Trouble Codes in this Section, for action
taken when a Type C DTC sets and conditions for clearing Type C DTCs.
Additional Information
• Refer to 6C1-1 Engine Management – V6 – General Information for details of the EOT sensor operation.
• For an intermittent fault condition, refer to 5.2 Intermittent Fault Conditions in this Section.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007