2007 ISUZU KB P190 ignition

9A1-70 RESTRAINT CONTROL SYSTEM

Step Action Yes No
8 1. Ignition switch is at “LOCK”.
2. Measure the resistance from the instrument meter cluster harness connector "SRS" warning lamp circuit terminal to the
SRS control unit harness connector terminal “4”.
Is the resistance 5.0 ohms or less? Go to Step 9 Replace the SRS
harness.
Go to Step 10
9 1. Disconnect the instrument meter cluster harness connector.
2. Measure the resistance from the "METER" fuse to the instrument meter cluster harness connector "SRS" warning
lamp power supply circuit terminal.
Is the resistance 5.0 ohms or less? Service instrument
meter cluster.
Install instrument meter cluster.
Go to Step 10 Replace the "SRS"
warning lamp power supply
circuit harness.
Go to Step 10
10 1. Reconnect all components and ensure all components are
properly mounted.
2. Clear the diagnostic trouble codes.
Is this step finished? Go to the “SRS
Diagnostic System Check” ―



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ISUZU KB P190 2007

RESTRAINT CONTROL SYSTEM 9A1-71

DTC B0062 (Flash Code 62) Battery Voltage Too High



RTW 79ALF000301

Circuit Description
W hen the ignition switch is turned “ON", the SRS
control unit judge to "Ignition 1" voltage is normal or not.

DTC Will Set When
The "Ignition 1" voltage is above 21.4V.

Action Taken
The SRS control unit turns “ON” the “SRS” warning
lamp and sets a diagnostic trouble code.

DTC Will Clear When
The “Ignition 1" voltage comes to below 16.5V.

DTC Chart Test Description
Number(s) below refer to circled number(s) on the
diagnostic chart.
2. This test determines whether the SRS control unit is malfunctioning.



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ISUZU KB P190 2007

9A1-72 RESTRAINT CONTROL SYSTEM

DTC B0062 (Flash Code 62) Battery Voltage Too High

Step Action Yes No
1 W as the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System Check”
2 1. Ignition switch is at “LOCK”.
2. Disconnect the SRS control unit.
3. Ignition switch “ON”.
4. Measure voltage on SRS control unit harness connector from terminal “1” to terminal “3” (ground).
Is voltage on terminal “1” below 16.5V? Ignition switch is at
“LOCK”.
Replace the SRS control unit.
Go to Step 3 Inspect the
Charging System. Refer to the
"Engine Electrical" section.
Go to Step 3
3 1. Reconnect all the components and ensure all components
are properly mounted.
2. Clear diagnostic trouble codes.
Is this step finished? Go to the “SRS
Diagnostic system Check” ―



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ISUZU KB P190 2007

RESTRAINT CONTROL SYSTEM 9A1-73

DTC B0063 (Flash Code 63) Battery Voltage Too Low



RTW 79ALF000301

Circuit Description
W hen the ignition switch is turned “ON", the SRS
control unit judge to "Ignition 1" voltage is normal or not.

DTC Will Set When
The "Ignition 1" voltage is below 7.2V.

Action Taken
The SRS control unit turns “ON” the “SRS” warning
lamp and sets a diagnostic trouble code.

DTC Will Clear When
The “Ignition 1" voltage comes to above 10.6V.

DTC Chart Test Description
Number(s) below refer to circled number(s) on the
diagnostic chart.
4. This test determines whether the malfunction is in the “Ignition 1” circuit.
5. This test determines whether the malfunction is in the “Ignition 1” circuit.



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ISUZU KB P190 2007

9A1-74 RESTRAINT CONTROL SYSTEM

DTC B0063 (Flash Code 63) Battery Voltage Too Low

Step Action Yes No
1 W as the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System Check”
2 1. Ignition switch is at “LOCK”.
2. Disconnect the SRS control unit.
3. Ignition switch “ON”.
4. Measure voltage on SRS control unit harness connector from terminal “1” to terminal “3” (ground).
Is voltage on terminal “1” above 10.6V? Go to Step 5 Go to Step 3
3

1. Ignition switch is at “LOCK”.
2. Remove and inspect “SRS” fuse to the “Ignition 1”.
Is fuse good? Go to Step 4 Replace the "SRS"
fuse.
Go to Step 6
4
1. Ignition switch is at “LOCK”.
2. Measure resistance from "SRS" fusel to SRS control unit
harness connector terminal “1”.
Is resistance 5.0 ohms or less? Inspect the
Charging System. Refer to the
"Engine Electrical" section.
Go to Step 6 Replace the SRS
harness.
Go to Step 6
5
1. Remove the "SRS" fuse.
2. Measure the resistance on the SRS control unit harness connector as follow.
z From terminals "1" to "3" and "23" (ground) (without the
pretensioner)
z From terminals "1" to "3" and "15" (ground) (with the
pretensioner and the passenger air bag)
z From terminals "1" to "3", "12" and "15" (ground) (with
the pretensioner and without the passenger air bag)
Does 5-8840-0366-0 display “OL” (Infinite)? Ignition switch is at
“LOCK”.
Replace the SRS control unit.
Go to Step 6 Replace SRS
Harness.
Go to Step 6
6 1. Reconnect all the components and ensure all components
are properly mounted.
2. Clear diagnostic trouble codes.
Is this step finished? Go to the “SRS
Diagnostic system Check” ―



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ISUZU KB P190 2007

RESTRAINT CONTROL SYSTEM 9A1-75

DTC B0071 (Flash Code 71) SRS Control Unit Internal Fault



RTW 79ALF000301
Circuit Description
DTC B0071 is an indication of a potential internal SRS
control unit malfunction and will set if any of the
following conditions are detected:
1) Microprocessor energy reverse time failure.
2) EEPROM read / write failure.
3) ROM check sum.
4) Calibration check sum fault.
5) Inflators reserve voltage low.
6) Inflators electronic sensor active signal not detected during commanded deployment.
7) QSDD (High-side/Low-side) FET failure.
8) Frontal accelerometer failure.
9) Phase lock loop lost lock.
10) QSDD communication fault.
DTC Will Set When
Any of the above indicated malfunctions are detected by
the SRS control unit. The malfunctions described
above are tested mainly during “Continuous Monitoring”
and some are run each ignition cycle.

Action Taken
SRS control unit turns “ON” the “SRS” warning lamp
and sets a diagnostic trouble code.

DTC Will Clear When
The SRS control unit is replaced.


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9A1-76 RESTRAINT CONTROL SYSTEM

DTC B0071 (Flash Code 71) SRS Control Unit Internal Fault
WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SRS CONTROL UNIT.
NEVER STRIKE OR JAR THE SRS CONTROL UNIT. NEVER POWER UP THE SRS WHEN THE SRS CONTROL
UNIT IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SRS CONTROL UNIT AND MOUNTING BRACKET
FASTENERS MUST BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTING TOWARD THE FRONT
OF THE VEHICLE TO ENSURE PROPER OPERATION OF THE SRS. THE SRS CONTROL UNIT COULD BE
ACTIVATED WHEN POWERED WHILE NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE
DEPLOYMENT AND RESULT IN PERSONAL INJURY.
CAUTION: If DTC B0071 can not be cleared by Tech2, it is necessary to replace the SRS control unit.

Step Action Yes No
1 W as the “SRS Diagnostic System Check” performed?
Ignition switch
“LOCK”.
Replace SRS control unit.
Repeat the “SRS
Diagnostic System Check” Go to the “SRS
Diagnostic System Check”



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IMMOBILIZER CONTROL SYSTEM (4JK1/4JJ1/HFV6) 11A-7
Powertrain Interface Module (PIM)
Legend1. Powertrain interface module (PIM)
Immobilizer Control Unit (ICU) Connector
End View
Connector No. B-109
Connector Color White
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 RED/YEL Battery voltage
2-N ot u se d
3 BLK Ground
4-N ot u se d
5 BLU CAN high
6 YEL CAN low
7-N ot u se d
8 VIO Alarm cancel (disarm) signal output (with anti-theft system)
9 YEL Ignition voltage
10 - Not used 11 - Not used
12 - Not used
RTW7BASH000501
123456
789101112

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ISUZU KB P190 2007