2007 ISUZU KB P190 Workshop Repair Manual

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Page 657 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 5A-64 BRAKE CONTROL SYSTEM
DTC C0238 (Flash Code 38) Front Speed Sensor Correlation

Step Action Value(s) Yes No
1 W ere the steps of the “Basic Diagnostic Flow Chart”
performed?
- Go

5A-64 BRAKE CONTROL SYSTEM
DTC C0238 (Flash Code 38) Front Speed Sensor Correlation

Step Action Value(s) Yes No
1 W ere the steps of the “Basic Diagnostic Flow Chart”
performed?
- Go to Step 2 Go to Basic
Diagnostic
Flow Chart
2 1. Check for the tire size of each wheels.
2. If the tire size is different, replace the tire.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 1. Check for the gear ratio of a front axle differential gear and a rear axle differential gear.
2. If the gear ratio is different, repair the gear ratio.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 4
4 Select “Display DTCs” with the Tech 2.
Note: Perform the various tests (actuator test, test
run, brake test, etc.) then observe the DTC with a
Tech 2.
Are any DTCs stored? - Go to Step 5 Verify repair
5 1. Check for a poor connection at the wheel speed sensor harness connector.
2. Check installation condition for wheel speed sensor.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 6
6 1. Check condition for sensor rotor.
2. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 7
7 1. Ignition “OFF” disconnect the EHCU and wheel
speed sensor.
2. Check the circuit between EHCU and wheel speed sensor. (short ground, or short to voltage)
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 8
8 1. Ignition “OFF”.
2. Check the EHCU circuit for an open, short to ground, or short to voltage. Also, check the EHCU
ignition feed circuit for an open or short to ground
and the EHCU ground circuit for an open or short to
voltage.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 9
9 1. Ignition “ON”, engine “OFF”.
2. Select “Display DTCs” with the Tech 2. Note: Perform the various tests (actuator test, test
run, brake test, etc.) then observe the DTC with a
Tech 2.
Are any DTCs stored? - Go to Step 10 Verify repair

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Page 658 of 6020

ISUZU KB P190 2007 Workshop Repair Manual BRAKE CONTROL SYSTEM 5A-65
Step Action
Value(s) Yes No
10 Replace EHCU.
Note: Check the EHCU type for specification, when
the EHCU is replaced.
(Specification; 2W D model or 4W D model)
W

Page 659 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 5A-66 BRAKE CONTROL SYSTEM
DTC C0241 (Flash Code 41) Front Right Hold Solenoid Valve Circuit
DTC C0242 (Flash Code 42) Front Right Release Solenoid Valve Circuit

RTW 75ALF000301
Ste

Page 660 of 6020

ISUZU KB P190 2007 Workshop Repair Manual BRAKE CONTROL SYSTEM 5A-67
Step Action
Value(s) Yes No
3 1. Ignition “ON”, engine “OFF”.
2. Select “Display DTCs” with the Tech 2. Note: Perform the various tests (actuator tes

Page 661 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 5A-68 BRAKE CONTROL SYSTEM
DTC C0245 (Flash Code 45) Front Left Hold Solenoid Valve Circuit
DTC C0246 (Flash Code 46) Front Left Release Solenoid Valve Circuit

RTW 75ALF000301
Step

Page 662 of 6020

ISUZU KB P190 2007 Workshop Repair Manual BRAKE CONTROL SYSTEM 5A-69
Step Action
Value(s) Yes No
3 1. Ignition “ON”, engine “OFF”.
2. Select “Display DTCs” with the Tech 2. Note: Perform the various tests (actuator tes

Page 663 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 5A-70 BRAKE CONTROL SYSTEM
DTC C0251 (Flash Code 51) Rear Hold Solenoid Valve Circuit
DTC C0252 (Flash Code 52) Rear Release Solenoid Valve Circuit

RTW 75ALF000301
Step Action Valu

Page 664 of 6020

ISUZU KB P190 2007 Workshop Repair Manual BRAKE CONTROL SYSTEM 5A-71
Step Action
Value(s) Yes No
3 1. Ignition “ON”, engine “OFF”.
2. Select “Display DTCs” with the Tech 2. Note: Perform the various tests (actuator tes

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