Dodge Ram Truck 1500-2500-3500. Manual — part 163

REAR SENSOR SHORTED — 93

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BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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REAR SENSOR SHORTED — 93 (CONTINUED)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Ignition on.

•

Set Condition:
The CAB detect high voltage on the wheel speed sensor circuit.

Possible Causes

INTERMITTENT REAR FRONT WHEEL SPEED SENSOR DTC

REAR FRONT WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO VOLTAGE

REAR FRONT WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO VOLTAGE

REAR FRONT WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO THE REAR FRONT WHEEL SPEED
SENSOR (-) CIRCUIT

TONE WHEEL

EXCESSIVE REAR FRONT WHEEL SPEED SENSOR AIR GAP

WHEEL BEARING

REAR FRONT WHEEL SPEED SENSOR

CONTROLLER ANTI-LOCK BRAKE

Diagnostic Test

1.

DTC IS ACTIVE

Turn the ignition on.

With the scan tool, clear DTCs.

Turn the ignition off.

Turn the ignition on.

With the scan tool, read DTCs.

Does the DRBIII

T

display the DTC?

Yes

>> Go To 2

No

>> Go To 11

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

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BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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REAR SENSOR SHORTED — 93 (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.

REAR WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO
VOLTAGE

Turn the ignition on.

Measure the voltage of the Rear Wheel Speed Sensor (+) circuit.

Is there any voltage present?

Yes

>> Repair Rear Wheel Speed Sensor (+) circuit for a short to

voltage.

Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES/ELECTRICAL - DIAGNOSIS AND TESTING)

No

>> Go To 7

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BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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REAR SENSOR SHORTED — 93 (CONTINUED)

7.

REAR WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO VOLTAGE

Measure the voltage of the Rear Wheel Speed Sensor (-) circuit.

Is there any voltage present?

Yes

>> Repair the Rear Wheel Speed Sensor (-) circuit for a short

to voltage.

Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES/ELECTRICAL - DIAGNOSIS AND TESTING)

No

>> Go To 8

8.

REAR WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO THE Rear WHEEL SPEED SENSOR (-)
CIRCUIT

Turn the ignition off.

Measure the resistance between the Rear Wheel Speed Sensor (+)
circuit and the Rear Wheel Speed Sensor (-) circuit at the Controller
Anti-lock Brake harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Repair Rear Wheel Speed Sensor (+) circuit for a short to

the Rear Wheel Speed Sensor (-) circuit.

Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES/ELECTRICAL - DIAGNOSIS AND TESTING)

No

>> Go To 9

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