Dodge Ram Truck 1500-2500-3500. Manual — part 153
INTERMITTENT SIGNAL FROM RIGHT FRONT SENSOR — 27 (CONTINUED)
16.
WIRING HARNESS INSPECTION
Turn the ignition off.
NOTE: Towing the vehicle with ignition ON may set this DTC.
Inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
>> Repair as necessary in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES/ELECTRICAL - DIAGNOSIS AND
TESTING)
No
>> Test Complete.
5 - 40
BRAKES - ABS - ELECTRICAL DIAGNOSTICS
DR/DH
LEFT FRONT SENSOR OPEN — 25
DR/DH
BRAKES - ABS - ELECTRICAL DIAGNOSTICS
5 - 41
LEFT FRONT SENSOR OPEN — 25 (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
The CAB detects an open in the wheel speed sensor circuit
Possible Causes
INTERMITTENT LEFT FRONT WHEEL SPEED SENSOR DTC
LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORT TO GROUND
LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
TONE WHEEL
EXCESSIVE LEFT FRONT WHEEL SPEED SENSOR AIR GAP
WHEEL BEARING
LEFT FRONT WHEEL SPEED SENSOR
CONTROL ANTI-LOCK BRAKE
Diagnostic Test
1.
DTC IS ACTIVE
Turn the ignition on.
With the DRBIII
T
, clear DTCs.
Turn the ignition off.
Turn the ignition on.
With the DRBIII
T
, select View DTCs.
Does the DRBIII
T
display the DTC?
Yes
>> Go To 2
No
>> Go To 12
2.
WHEEL SPEED SENSOR INSPECTION
Turn the ignition off.
Inspect the Wheel Speed Sensor for proper mounting.
Inspect the Wheel Speed Sensor harness and connector.
Inspect the Wheel Speed Sensor for excessive debris on the sensor.
Were any problems found?
Yes
>> Repair as necessary in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES/ELECTRICAL - DIAGNOSIS AND
TESTING)
No
>> Go To 3
5 - 42
BRAKES - ABS - ELECTRICAL DIAGNOSTICS
DR/DH
LEFT FRONT SENSOR OPEN — 25 (CONTINUED)
3.
TONE WHEEL DAMAGED/MISSING
Inspect the Tone Wheel in accordance with the Service Information.
NOTE: The Tone Wheel Teeth should be perfectly square, not bent or nicked.
Were any problems found?
Yes
>> Replace the Tone Wheel in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES/ELECTRICAL - DIAGNOSIS AND
TESTING)
No
>> Go To 4
4.
EXCESSIVE WHEEL SPEED SENSOR AIR GAP
Measure the Wheel Speed Sensor Air Gap in accordance with the Service Information.
Were any problems found?
Yes
>> Repair as necessary in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES/ELECTRICAL - DIAGNOSIS AND
TESTING)
No
>> Go To 5
5.
WHEEL BEARING LOOSE/BINDING
Inspect the wheel bearings for excessive run out or improper clearance in accordance with the Service Information.
Were any problems found?
Yes
>> Repair as necessary in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES/ELECTRICAL - DIAGNOSIS AND
TESTING)
No
>> Go To 6
6.
LEFT FRONT WHEEL SPEED SENSOR (+) CIRCUIT SHORTED
TO GROUND
Turn the ignition off.
Disconnect the Left Front Wheel Speed Sensor harness connector.
Disconnect the Controller Anti-lock Brake harness connector.
NOTE: Check connector - Clean/repair as necessary.
Measure the resistance between the Left Front Wheel Speed Sensor
(+) circuit and ground.
Is the resistance above 5.0 ohms?
Yes
>> Go To 7
No
>> Repair the Left Front Wheel Speed Sensor (+) circuit for a
short to ground.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES/ELECTRICAL - DIAGNOSIS AND TESTING)
DR/DH
BRAKES - ABS - ELECTRICAL DIAGNOSTICS
5 - 43
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