Isuzu KB P190. Manual — part 160
BRAKE CONTROL SYSTEM 5A-47
ABS Warning Lamp ON Steady
Step Action Value(s)
Yes
No
1
1. Check the ABS warning lamp lighting circuit for a
short.
2. If a problem found, repair as necessary.
Was a problem found?
-
Go to Step 3
Go to Step 2
2
1. Check the ABS warning lamp lighting circuit at the
meter for a short. Refer to METER, WARNING
LIGHT AND INDICATOR LIGHT in 8 section.
2. If a problem is found, repair or replace the meter.
Was a problem found?
-
Go to Step 3
Go to Step 4
3
1. Connect all connectors.
2. Ignition “ON”, engine “OFF”.
3. Wait for about 10 seconds.
4. Observe the ABS warning lamp.
Is the ABS warning lamp turned “OFF”?
-
Verify repair
Go to Step 4
4 Replace
EHCU.
Note: Check the EHCU type for specification, the
EHCU is replaced.
(Specification; 2WD or 4WD Model)
Is the action complete?
- Verify
repair -
5A-48 BRAKE CONTROL SYSTEM
DTC C0221 (Flash Code 21) Front 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 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
BRAKE CONTROL SYSTEM 5A-49
Step Action Value(s) Yes
No
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
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-50 BRAKE CONTROL SYSTEM
DTC C0222 (Flash Code 22) Front 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 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 right wheel speed
sensor or the sensor rotor?
-
Go to Step 13
Go to Step 7
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