brake sensor ISUZU TF SERIES 2004 Repair Manual

BRAKE CONTROL SYSTEM 5A-59

Step Action
Value(s) Yes No
5 Repair or replace the rear right sensor rotor at rear
axle.
Was the action complete? - Verify repair
Go to Step 6 -
6 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 7 Verify repair
7 Replace EHCU.
Note : Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2WD model or 4WD model)
Was the action complete? - Verify repair -

5A-60 BRAKE CONTROL SYSTEM

DTC C0233 (Flash Code 33) Rear 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 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. Check condition for sensor rotor at rear axle.
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 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 5

BRAKE CONTROL SYSTEM 5A-61

Step Action
Value(s) Yes No
5 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 6 Verify repair
6 Replace EHCU.
Note : Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2WD model or 4WD model)
Was the action complete? - Verify repair -

5A-62 BRAKE CONTROL SYSTEM

DTC C0235 (Flash Code 35) Rear 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 rear left wheel
speed sensor harness connector.
2. Check installation condition for rear 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 rear left
wheel speed sensor.
2. Check the circuit between EHCU and rear 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

BRAKE CONTROL SYSTEM 5A-63

Step Action
Value(s) Yes No
4 1. Replace rear 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
Tech2.
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)
Was the action complete? - Verify repair -

5A-64 BRAKE CONTROL SYSTEM

DTC C0236 (Flash Code 36) Rear 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 rear left wheel
speed sensor harness connector.
2. Check installation condition for rear 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 rear left
wheel speed sensor.
2. Check the circuit between EHCU and rear 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 rear 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
Tech2.
Are any DTCs stored? - Go to Step 5 Verify repair

BRAKE CONTROL SYSTEM 5A-65

Step Action
Value(s) Yes No
5 Repair or replace the rear left sensor rotor at rear
axle.
Was the action complete? - Verify repair
Go to Step 6 -
6 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 7 Verify repair
7 Replace EHCU.
Note : Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2WD model or 4WD model)
Was the action complete? - Verify repair -

5A-66 BRAKE CONTROL SYSTEM

DTC C0237 (Flash Code 37) Rear 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 rear left wheel
speed sensor harness connector.
2. Check installation condition for rear 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 rear axle.
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 rear left
wheel speed sensor.
2. Check the circuit between EHCU and rear 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

BRAKE CONTROL SYSTEM 5A-67

Step Action
Value(s) Yes No
5 1. Replace rear 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
Tech2.
Are any DTCs stored? - Go to Step 6 Verify repair
6 Replace EHCU.
Note : Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2WD model or 4WD model)
Was the action complete? - Verify repair -

5A-80 BRAKE CONTROL SYSTEM

DTC C0274 (Flash Code 74) ABS Operation Long Time


RTW45AMF000201

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 Was the “Basic Inspection Procedure” performed?
- Go to Step 3 Go to Basic
Inspection
Procedure
3 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.
Was a problem found? - Verify repair Go to Step 4
4 1. Check condition for sensor rotor.
2. If a problem is found, repair as necessary.
Was a problem found? - Verify repair Go to Step 5
5 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.
Was a problem found? - Verify repair Go to Step 6