Dodge Ram Truck 1500-2500-3500. Manual — part 149
INTERMITTENT SIGNAL FROM LEFT 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.
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BRAKES - ABS - ELECTRICAL DIAGNOSTICS
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INTERMITTENT SIGNAL FROM REAR SENSOR — 37
DR/DH
BRAKES - ABS - ELECTRICAL DIAGNOSTICS
5 - 25
INTERMITTENT SIGNAL FROM REAR SENSOR — 37 (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition turned on for at least 3.5 seconds. Average filtered speed for the wheels above 19 km/h (12 MPH)
(brake released of ABS inactive) or 32 km/h (20 MPH) (brake applied or ABS active).
•
Set Condition:
When the is a sudden change of output signal from the sensor.
Possible Causes
INTERMITTENT REAR WHEEL SPEED SENSOR DTC
REAR WHEEL SPEED SENSOR (+) CIRCUIT SHORT TO GROUND
REAR WHEEL SPEED SENSOR (-) CIRCUIT SHORT TO GROUND
REAR WHEEL SPEED SENSOR (+) CIRCUIT OPEN
REAR WHEEL SPEED SENSOR (-) CIRCUIT OPEN
REAR WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO VOLTAGE
REAR WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO VOLTAGE
REAR WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO THE REAR WHEEL SPEED SENSOR (-) CIRCUIT
TONE WHEEL
EXCESSIVE REAR WHEEL SPEED SENSOR AIR GAP
WHEEL BEARING/REAR DIFFERENTIAL
REAR WHEEL SPEED SENSOR
CONTROLLER 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
, read DTCs.
Does the DRBIII
T
display the DTC?
Yes
>> Go To 2
No
>> Go To 16
2.
CONTROLLER ANTI-LOCK BRAKE HARNESS CONNECTOR INSPECTION
Turn the ignition off.
Inspect the CAB wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Inspect the CAB wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Were any problems found?
Yes
>> Clean or 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
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BRAKES - ABS - ELECTRICAL DIAGNOSTICS
DR/DH
INTERMITTENT SIGNAL FROM REAR SENSOR — 37 (CONTINUED)
3.
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 4
4.
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 5
5.
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 6
6.
WHEEL BEARING/REAR DIFFERENTIAL
Inspect the wheel bearings for excessive run out or improper clearance in accordance with the Service Information.
Inspect the rear differential for proper operating. Refer to 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 7
DR/DH
BRAKES - ABS - ELECTRICAL DIAGNOSTICS
5 - 27
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