2007 ISUZU KB P190 sensor

5A-52 BRAKE CONTROL SYSTEM
DTC C0225 (Flash Code 25) Front Left Wheel Speed Sensor Short Circuit or
Circuit Open



RTW 75AMF001301

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 a poor connection at the front left wheel speed sensor harness connector.
2. Check installation condition for front left wheel speed sensor.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 1. Ignition “OFF”, disconnect the EHCU and front left
wheel speed sensor.
2. Check the circuit between EHCU and front left wheel speed sensor. (Circuit for an open, short to
ground, or short to voltage.)
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 4

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TO MODEL INDEX
ISUZU KB P190 2007

BRAKE CONTROL SYSTEM 5A-53
Step Action
Value(s) Yes No
4 1. Replace front left wheel speed sensor.
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 5 Verify repair
5 Replace EHCU.
Note: Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2W D model or 4W D model)
Is the action complete? - Verify repair -


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TO MODEL INDEX
ISUZU KB P190 2007

5A-54 BRAKE CONTROL SYSTEM
DTC C0226 (Flash Code 26) Front Left Wheel Speed Sensor Signal
Malfunction



RTW 75AMF001301

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 the tire for the following conditions.
• Tire specification
• W ear of the outer surface
2. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 Note:
This DTC is set when certain tire is rotated alone.

Has certain tire been rotated alone by performing for
lift-up or roller tester? - Verify repair Go to Step 4
4 Is the front right wheel bearing rattling?
- Go to Step 11 Go to Step 5
5 Is the front right wheel speed sensor or the sensor
rotor rattling? - Go to Step 12 Go to Step 6
6 Is iron powder attached to the front left wheel speed
sensor or the sensor rotor? - Go to Step 13 Go to Step 7

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TO MODEL INDEX
ISUZU KB P190 2007

BRAKE CONTROL SYSTEM 5A-55
Step Action Value(s) Yes No
7 Check the front left wheel speed sensor. Refer to
"W heel Speed Sensor Inspection procedure"
W as a problem found? - Go to Step 10 Go to Step 8
8 Does the sensor rotor have missing tooth or saw- toothed? - Go to Step 14 Go to Step 9
9 1. Clear the DTC.
2. Test run the vehicle, and check the DTC. Is the DTC displayed repeatedly? - Go to Step 18 Go to Step 17
10 Is the wheel speed sensor damaged or saw-toothed?
- Go to Step 15 Go to Step 16
11 Adjust the preload of the wheel bearing.
Is the action complete? - Verify repair -
12 Repair or replace the front left speed sensor or the
sensor rotor.
Is the action complete? - Verify repair -
13 Repair the front left speed sensor or the sensor rotor. Is the action complete? - Verify repair -
14 Replace the sensor rotor.
Is the action complete? - Verify repair -
15 Replace the front left wheel speed sensor.
Is the action complete? - Verify repair -
16 Repair or replace the front left speed sensor circuits.
Is the action complete? - Verify repair -
17 Check the connection btween the EHCU and the
front left wheel speed sensor and repair as
necessary Refer to "Note on Intermittents".
Is the action complete? - Verify repair -
18 Replace EHCU.
Note: Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2W D model or 4W D model)
Is the action complete? - Verify repair -


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

5A-56 BRAKE CONTROL SYSTEM
DTC C0231 (Flash Code 31) Rear Right Wheel Speed Sensor Short Circuit or
Circuit Open



RTW 75AMF001301

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 a poor connection at the rear right wheel speed sensor harness connector.
2. Check installation condition for rear right wheel speed sensor.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 1. Ignition “OFF”, disconnect the EHCU and rear right
wheel speed sensor.
2. Check the circuit between EHCU and rear right wheel speed sensor. (Circuit for an open, short to
ground, or short to voltage.)
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 4

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

BRAKE CONTROL SYSTEM 5A-57
Step Action
Value(s) Yes No
4 1. Replace rear right wheel speed sensor.
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 5 Verify repair
5 Replace EHCU.
Note: Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2W D model or 4W D model)
Is the action complete? - Verify repair -


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

5A-58 BRAKE CONTROL SYSTEM
DTC C0232 (Flash Code 32) Rear Right Wheel Speed Sensor Signal
Malfunction



RTW 75AMF001301

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 the tire for the following conditions.
• Tire specification
• W ear of the outer surface
2. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 Note:
This DTC is set when certain tire is rotated alone.

Has certain tire been rotated alone by performing for
lift-up or roller tester? - Verify repair Go to Step 4
4 Is the rear right wheel bearing rattling?
- Go to Step 11 Go to Step 5
5 Is the rear right wheel speed sensor or the sensor
rotor rattling? - Go to Step 12 Go to Step 6
6 Is iron powder attached to the rear right wheel speed
sensor or the sensor rotor? - Go to Step 13 Go to Step 7

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

BRAKE CONTROL SYSTEM 5A-59
Step Action Value(s) Yes No
7 Check the rear right wheel speed sensor. Refer to
"W heel Speed Sensor Inspection procedure"
W as a problem found? - Go to Step 10 Go to Step 8
8 Does the sensor rotor have missing tooth or saw- toothed? - Go to Step 14 Go to Step 9
9 1. Clear the DTC.
2. Test run the vehicle, and check the DTC. Is the DTC displayed repeatedly? - Go to Step 18 Go to Step 17
10 Is the wheel speed sensor damaged or saw-toothed?
- Go to Step 15 Go to Step 16
11 Repair or replace the wheel bearing.
Is the action complete? - Verify repair -
12 Repair or replace the rear right speed sensor or the
sensor rotor.
Is the action complete? - Verify repair -
13 Repair the rear right speed sensor or the sensor rotor.
Is the action complete? - Verify repair -
14 Replace the sensor rotor. Is the action complete? - Verify repair -
15 Replace the rear right wheel speed sensor.
Is the action complete? - Verify repair -
16 Repair or replace the rear right speed sensor circuits.
Is the action complete? - Verify repair -
17 Check the connection btween the EHCU and the rear
right wheel speed sensor and repair as necessary
Refer to "Note on Intermittents".
Is the action complete? - Verify repair -
18 Replace EHCU.
Note: Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2W D model or 4W D model)
Is the action complete? - Verify repair -


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007