2004 ISUZU TF SERIES ignition

5A-44 BRAKE CONTROL SYSTEM

DTC C0221 (Flash Code 21) Front Right Wheel Speed Sensor Short Circuit or
Circuit Open

LTW35AMF000101

Step Action
Value(s) Yes No
1 Was 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 right wheel
speed sensor harness connector.
2. Check installation condition for front 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 front right
wheel speed sensor.
2. Check the circuit between EHCU and front 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

5A-46 BRAKE CONTROL SYSTEM

DTC C0222 (Flash Code 22) Front Right Wheel Speed Sensor Incorrect Signal

LTW35AMF000101

Step Action Value(s) Yes No
1 Was 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 right wheel
speed sensor harness connector.
2. Check installation condition for front 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 front right
wheel speed sensor.
2. Check the circuit between EHCU and front right
wheel speed sensor. (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
4 1. Replace front 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
Tech2.
Are any DTCs stored? - Go to Step 5 Verify repair

5A-48 BRAKE CONTROL SYSTEM

DTC C0223 (Flash Code 23) Front Right Wheel Speed Sensor Signal - Tooth
Chipping

LTW35AMF000101

Step Action
Value(s) Yes No
1 Was 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 right wheel
speed sensor harness connector.
2. Check installation condition for front 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. Check condition for sensor rotor at front hub.
2. If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 4
4 1. Ignition “OFF,” disconnect the EHCU and front right
wheel speed sensor.
2. Check the circuit between EHCU and front right
wheel speed sensor. (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 5

5A-50 BRAKE CONTROL SYSTEM

DTC C0225 (Flash Code 25) Front Left Wheel Speed Sensor Short Circuit or
Circuit Open

LTW35AMF000101

Step Action
Value(s) Yes No
1 Was 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.
Was 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.
Was a problem found?
- Verify repair Go to Step 4

5A-52 BRAKE CONTROL SYSTEM

DTC C0226 (Flash Code 26) Front Left Wheel Speed Sensor Incorrect Signal

LTW35AMF000101

Step Action Value(s) Yes No
1 Was 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.
Was 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. (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
4 1. Replace front left wheel speed sensor.
2. Select “Display DTCs” with the Tech 2.
Are any DTCs stored?
- Go to Step 5 Verify repair
5 Repair or replace the front left sensor rotor at front
hub.
Was the action complete? - Verify repair
Go to Step 6 -

5A-54 BRAKE CONTROL SYSTEM

DTC C0227 (Flash Code 27) Front Left Wheel Speed Sensor Signal - Tooth
Chipping

LTW35AMF000101

Step Action
Value(s) Yes No
1 Was 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.
Was a problem found?
- Verify repair Go to Step 3
3 1. Check condition for sensor rotor at front hub.
2. If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 4
4 1. Ignition “OFF,” disconnect the EHCU and front left
wheel speed sensor.
2. Check the circuit between EHCU and front left
wheel speed sensor. (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 5

5A-56 BRAKE CONTROL SYSTEM

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

LTW35AMF000101

Step Action
Value(s) Yes No
1 Was 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

5A-58 BRAKE CONTROL SYSTEM

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

LTW35AMF000101

Step Action
Value(s) Yes No
1 Was 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. (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
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
Tech2.
Are any DTCs stored? - Go to Step 5 Verify repair