Isuzu KB P190. Manual - part 162

BRAKE CONTROL SYSTEM   5A-55 

Step Action  Value(s) 

Yes 

No 

7 

Check the front left wheel speed sensor. Refer to 
"Wheel Speed Sensor Inspection procedure" 

Was 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 ; 2WD model or 4WD model) 

Is the action complete? 

- 

Verify repair 

- 

 

5A-56   BRAKE CONTROL SYSTEM 

DTC C0231 (Flash Code 31) Rear Right Wheel Speed Sensor Short Circuit or 

Circuit Open 

 

 

 

 

RTW75AMF001301 

 

Step Action  Value(s) Yes 

No 

1 

Were 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. 

Was 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. 

Was a problem found? 

- 

Verify repair 

Go to Step 4 

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 ; 2WD model or 4WD model) 

Is the action complete? 

- 

Verify repair 

- 

 

5A-58   BRAKE CONTROL SYSTEM 

DTC C0232 (Flash Code 32) Rear Right Wheel Speed Sensor Signal 

Malfunction 

 

 

 

 

RTW75AMF001301 

 

Step Action  Value(s) 

Yes 

No 

1 

Were 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 
• Wear of the outer surface 

  2. If a problem is found, repair as necessary. 

Was 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