2007 ISUZU KB P190 fuses

Engine Management – V6 – Diagnostics Page 6C1-2–148

Conditions for Clearing the DTC
The ECM system voltage 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
• For an intermittent fault condition, refer to 5.2 Intermittent Fault Conditions in this Section.
• Refer to 6C1-1 Engine Management – V6 – General Information for details of the ECM operation.
• 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.
DTC P0560, P0562 or P0563 Diagnostic Table
Step Action Yes No
1 Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
4.4 Diagnostic
System Check in this Section
2 1 Switch off the ignition for 30 seconds.
2 Increase the engine speed to 1500 rpm or operate the vehicle within the conditions for running the DTC.
3 Using Tech 2, select the DTC display function.
Does DTC P0560, P0562, or P0563 fail this ignition cycle? Go to Step 3 Refer to Additional
Information in this DTC
3 Test the battery condition. Refer to 6D1-3 Battery – V6.
W as any fault found and rectified? Go to Step 9 Go to Step 4
4 Test the charging system operation. Refer to 6D1-1 Charging System
– V6.
W as any fault found and rectified? Go to Step 9 Go to Step 5
5 Test all the ECM fuses. Refer to 8A Electrical - Body and Chassis.
W as any fault found and rectified? Go to Step 9 Go to Step 6
6 Check the ECM ground connections for corrosion, loose terminal or
incorrect position. Refer to 8A Electrical - Body and Chassis for
information on electrical fault diagnosis.
W as any fault found and rectified? Go to Step 9 Go to Step 7
7 Test the following circuits for a high resistance or open circuit fault
condition.
• Continuous battery supply circuit,
• switched battery supply circuit,
• ignition 1 circuit, and
• ignition 2 circuit.
Refer to 8A Electrical - Body and Chassis for information on electrical
fault diagnosis.
W as any fault found and rectified? Go to Step 9 Go to Step 8
8 Replace the ECM. Refer to 6C1-3 Engine Management – V6 –
Service Operations.
W as the repair completed? Go to Step 9 —

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ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–150

DTC P0606
There is an internal ECM circuit fault condition for 6 seconds.
Conditions for Clearing the DTC
The ECM Internal Circuit, Programming or Memory Fault DTCs are Type A DTCs. Refer to 1.4 Diagnostic Trouble
Codes in this Section, for action taken when a Type A DTC sets and conditions for clearing Type A DTCs.
Additional Information
• Refer to 6C1-1 Engine Management – V6 – General Information for details of the ECM operation.
• 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.
• 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.
DTC P0601, P0602, P0604 and P0606 Diagnostic Table
Step Action Yes No
1 Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
4.4 Diagnostic System Check in this Section
2 1 Switch off the ignition for 30 seconds.
2 Operate the vehicle within the conditions for running the DTC.
3 Using Tech 2, select the DTC display function.
Does DTC P0601, P0602, P0604 or P0606 fail this ignition cycle? Go to Step 3 Refer to Additional
Information in this DTC
3 Test all ECM fuses and ground connections. Refer to 8A Electrical -
Body and Chassis.
W as any fault found and rectified? Go to Step 6 Go to Step 4
4 Attempt to program the ECM.
W as the programming successful? Go to Step 6 Go to Step 5
5 Replace the ECM. Refer to 6C1-3 Engine Management – V6 –
Service Operations.
W as the repair completed? Go to Step 6 —
6 1 Using Tech 2, clear the DTCs.
2 Switch off the ignition for 30 seconds.
3 Start the engine.
4 Operate the vehicle within the conditions for running the DTC.
Does any of the ECM internal circuit, programming or memory fault
DTCs fail this ignition cycle? Go to Step 2 Go to Step 7
7 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, check the system for correct operation.

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ISUZU KB P190 2007

Starting System – V6 Page 6D1-2–16

Engine Compartment Relay And Fuse Panel


Figure 6D1-2 – 4

1 Remove fuses SBF5 and SBF9 from the engine compartment fuse panel to disable the ignition and prevent the engine from starting, refer to 8A Electrical Body and Chassis.
2 Chock the wheels.
3 For vehicles fitted with automatic transmission ensure the transmission is in P (park) or N (neutral) and the hand brake is applied.
4 Ensure the engine is at room temperature or normal operating temperature and in good working order.
Bad Connection Test
A bad connection appears as a voltage reading when the multimeter leads are connected to two different positive (or
negative) connections.
1 Using a multimeter set to measure voltage, connect the multimeter’s positive lead to the positive battery post.
2 Connect the multimeter’s negative lead to the starter motor M terminal.
3 Record the voltage that displayed during cranking.
4 Repeat this with the multimeter’s negative lead connected to the solenoid switch connector P – 4 pin B (circuit 1).
5 Also repeat this connecting the multimeter’s negative lead to the battery cable strands.
6 Restore all connections that show a significant resistance (voltage reading).

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Battery Page 6D1-3–11

b W ait 15 seconds for the battery to recover.
8 If possible, set the selector to 50% of rapid discharge current (or three times the 20 hour discharge rate).
9 Apply the load test for 10 seconds and record the battery voltage. If one cell is faulty it will gas excessively or overheat. This indicates a faulty battery.
10 Recharge the battery if the voltage is at or below the minimum voltage specified by the HRD manufacturer (or 9.6 V).
11 Replace the battery if the voltage is below the minimum voltage specified by the HRD manufacturer (or below 9.6 V after the battery is charged and the test is repeated). Refer to 4.1 Battery.
12 Connect the battery positive terminal.
13 Connect the battery negative terminal.
Alternate Load Test
If HRD test equipment is not available, test the battery as follows:
1 Read and obey the safety precautions for working with batteries, refer to 2 Safety Precautions.
2 Ensure the state of the battery is at least 65% charged. Refer to 3.3 Hydrometer Test.
3 Connect a voltmeter (1) between the battery terminals.
4 Turn the headlights on to high-beam for 10 seconds to remove any surface charge from the battery.
5 Remove fuses EB11 and EB12 from the engine compartment fuse and relay housing. This prevents
vehicle ignition and fuel injection while cranking the
engine.
6 Crank the engine and read the voltmeter. At temperatures above 5°C, the voltage of a fully charged
battery should not fall below 9.6 V.
NOTE
• If the battery and engine temperatures are
below 5 °C, the voltage may fall to 9 V.
• Try to avoid activating the starter motor
continuously for more than 30 seconds. If
activating the starter motor for 30 seconds,
allow the starter motor to cool for 3 minutes.
7 Replace the battery if a cell gasses excessively or overheats or if the voltage falls away quickly.
Figure 6D1-3 – 6
3.5 Battery Current Draw Test
The following test determines if excess current is being drawn from the battery whilst the vehicle has all accessories
turned off. Excess current draw will cause the battery to go flat if the vehicle is not started for an extended period.
Test Preparation
1 Read and obey the safety precautions for working with batteries, refer to 2 Safety Precautions.
2 If the battery is flat, temporarily install a good battery for the duration of the test.
3 Ensure the vehicle starts and the accessories operate normally.
4 Ensure the theft deterrent system operates normally. Refer to 11A Immobiliser.
5 Open all the side windows for access purposes.
6 Switch the ignition off.
7 Check that all interior illumination is off, including any compartment lighting.
8 Close all doors.

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Battery Page 6D1-3–12

9 Lock the doors and activate the theft deterrent system to arm the vehicle.
10 If the multimeter contains fuses, check they are serviceable.
Test Procedure
1 Switch the multimeter to the mA current range (1).
2 Connect the positive test lead (2) to the fused mA terminal of the multimeter.
3 Connect the negative test (3) lead to the common terminal of the multimeter.
4 Connect large alligator clips to the ends of both test leads.
Figure 6D1-3 – 7
5 Connect the negative test lead clip to the threads of the battery negative terminal clamp (1).
6 Connect the positive lead’s clip to the threads of a convenient engine bolt (2).

Do not turn on the ignition switch while this
test is in progress. It will blow the
multimeter’s low current fuse.
7 Check the multimeter connections are secure.
8 Disconnect the vehicle’s main electrical earth by removing the battery negative terminal cable retaining
nut (3) and separating the cable from the battery
clamp.
Figure 6D1-3 – 8
9 Read the vehicle’s battery saver current on the multimeter. The multimeter reading should be within 16 – 30 mA (fluctuating).
10 If the multimeter reading is higher than specified, refer to Fault Diagnosis in this Section, otherwise restore the vehicle to its prior condition, refer to Restore in this Section.
Fault Diagnosis

Do not open any doors during this inspection.
If the doors must be opened, reinstall the
battery terminal to the battery clamp to
protect the multimeter's fuse from blowing.
Alternatively, use the higher (10 A) fuse rated
terminal on the multimeter until the source of
the higher current draw has been found.
1 Visually inspect the vehicle for illuminated lamps and components activated by energised relays.
2 If the cause of the excessive current draw is not apparent, remove one fuse (or circuit breaker) at a time to determine the circuit group that is drawing excess current. Refer to 8A Electrical Body & Chassis for fuse grouping
location.

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Battery Page 6D1-3–13

3 W hen the circuit group is determined, install the fuse / circuit breaker and identify the specific circuit within this
group that is drawing the excess current. Disconnect the wiring harness connectors in this circuit group one at a
time. Refer to 8A Electrical Body & Chassis.
4 W hen the cause is disconnected, the multimeter reading should drop to the correct reading as outlined in Step 9 of the Test Procedure in this Section.
5 If required, remove the components in this circuit one at a time to determine the cause of the excessive standing current. Refer to 8A Electrical Body & Chassis.
6 Repair the fault, refer to 8A Electrical Body & Chassis.
7 Ensure any fuses, circuit breakers and connectors that have been removed are secure.
Restore
1 Reconnect the electrical earth cable to the battery terminal and tighten the nut to the correct torque specification.
Battery terminal nut
torque specification .....................................2.0 – 5.0 Nm
2 Disconnect the multimeter connections.

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–32

DTC C0550 Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
7.2 Diagnostic System Check
2 1 Switch off the ignition for 30 seconds.
2 Operate the vehicle within the conditions for setting DTC C0550.
3 Using Tech 2, select the DTC display function.
Does C0550 fail this ignition cycle? Go to Step 3 Refer to
Additional
Information in this Section
3 1 Test all ground circuits of the PIM for a high resistance or an
open circuit fault condition. Refer to 8A Electrical - Body and
Chassis for information on electrical fault diagnosis.
2 Test the PIM fuses and replace as required. Refer to 8A Electrical-Body and Chassis.
3 Test the PIM battery supply voltage circuit for a high resistance, open circuit or short to ground fault condition. Refer to 8A
Electrical - Body and Chassis for information on electrical fault
diagnosis.
Has any fault been found and rectified? Go to Step 5 Go to Step 4
4 Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 5 —
5 1 Using Tech 2, clear the DTCs.
2 Switch off the ignition for 30 seconds.
3 Start the engine.
4 Operate the vehicle within the conditions for running the DTC.
Does DTC C0550 fail this ignition cycle? Go to Step 2 Go to Step 6
6 Using Tech 2, select the DTC display function.
Does Tech 2 display any DTCs? Go to the
appropriate DTC
Table System OK
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.
9.2 DTC U2100 – No Communication With CAN Bus (High Speed)
DTC Description
This diagnostic procedure supports DTC U2100 – CAN Bus-off.
Circuit Description
The transmission control module (TCM) and engine control module (ECM) transmit and receive data using the GM LAN
serial data protocol, while the immobiliser control unit (ICU) uses Keyword 2000 serial data protocol.
As the GM LAN and keyword 2000 protocols are not compatible, a powertrain interface module (PIM) is integrated into
the serial data system to enable communication between the two different protocols. The PIM also integrates with the
instrument cluster assembly.
The PIM will detect if a short to ground or a short to voltage condition occurs on GM LAN circuits. If either of these
conditions occur, DTC U2100 sets.
Additional Information
• Refer to 6 W iring Diagram and Connector for the following information:

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ISUZU KB P190 2007

Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–28
7 Ensure that all wiring harness connectors are fitted correctly and secure.
8 W hen steam or pressure cleaning vehicle components, such as engines, transmissions, etc., do not direct the cleaning nozzle at any system electrical wiring harness connectors or components.
9 Do not clear any DTCs unless instructed.
10 The fault must be present when using the Diagnostic Trouble Code (DTC) Diagnostic Tables. Otherwise, misdiagnosis or replacement of good parts may occur.
11 Do not touch any electronic control module connector pins or soldered components on the circuit board. This is required to avoid the possibility of electrostatic discharge damage.
12 Use only the test equipment specified in the diagnostic tables, as other test equipment may give incorrect results or damage good components.
13 Electronic control modules are designed to withstand normal current draws associated with vehicle operation. However, the following fault conditions or incorrect test procedure may overload internal control module circuits and
irreparably damage the control module:
• A short to voltage fault condition in any of the control module low reference circuits may cause internal and/or
sensor damage. Therefore, any short to voltage fault condition in the control module low reference circuits
must be rectified before replacing a faulty component.
• A short to ground fault condition in any of the control module 5 volts reference circuits may cause internal
control module and/or sensor damage. Therefore, any short to ground fault condition in the control module 5
volt reference circuits must be rectified before replacing a faulty component.
• W hen using a test light to test an electrical circuit, do not use any of the control module low reference circuits
or 5 volts reference circuits as a reference point. Otherwise, excessive current draw from the test light may
damage the control module.
14 Disregard DTCs that set while performing the following diagnostic Steps:
• Using the Tech 2 output control function, or
• Disconnecting a control module system sensor connector then switching the ignition ON.
15 After completing the required diagnostics and service operations, road test the vehicle to ensure correct system operation.
4.4 Preliminary Checks
The Preliminary Checks is a set of visual and physical checks or inspections that may quickly identify a control module
system fault condition:
1 Refer to relevant Service Techlines for information regarding the fault condition.
2 Ensure that the battery is fully charged.
3 Inspect the battery connections for corrosion or a loose terminal.
4 Ensure that all relevant control module system related fuses are serviceable.
5 Inspect for incorrect aftermarket theft deterrent devices, lights or mobile phone installation.
6 Ensure that there is no speaker magnet positioned too close to any electronic module that contains relays.
7 Inspect the system wiring harness for proper connections, pinches or cuts.
8 Ensure that all control module related electrical wiring connectors are fitted correctly.
9 Inspect the control module ground connections for corrosion, loose terminal or incorrect position.
10 Ensure that the resistance between the control module housing and the battery ground cable is less than 0.5 ohms.
11 Check that the control module and its mounting bracket is secure.
12 Check all control module related components for correct installation.
13 Check the control module and related wiring harness routing to ensure that no rubbing or cutting of the wiring harness by sharp body components can occur.

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