Dodge Ram Truck 1500-2500-3500. Manual — part 150

INTERMITTENT SIGNAL FROM REAR SENSOR — 37 (CONTINUED)

7.

REAR WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO GROUND

Turn the ignition off.

Disconnect the Rear 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 Rear Wheel Speed Sensor (+)
circuit and ground.

Is the resistance above 5.0 ohms?

Yes

>> Go To 8

No

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

short to ground.

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

8.

REAR WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO GROUND

Measure the resistance between the Rear Wheel Speed Sensor (-) cir-
cuit and ground.

Is the resistance above 5.0 ohms?

Yes

>> Go To 9

No

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

to ground.

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

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BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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INTERMITTENT SIGNAL FROM REAR SENSOR — 37 (CONTINUED)

9.

REAR WHEEL SPEED SENSOR (+) CIRCUIT OPEN

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

Is the resistance below 5.0 ohms?

Yes

>> Go To 10

No

>> Repair the open Rear Wheel Speed Sensor (+) circuit.

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

10.

REAR WHEEL SPEED SENSOR (-) CIRCUIT OPEN

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

Is the resistance below 5 ohms?

Yes

>> Go To 11

No

>> Repair the open Rear Wheel Speed Sensor (-) circuit.

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

DR/DH

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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INTERMITTENT SIGNAL FROM REAR SENSOR — 37 (CONTINUED)

11.

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 12

12.

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 13

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BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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INTERMITTENT SIGNAL FROM REAR SENSOR — 37 (CONTINUED)

13.

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 14

14.

REAR WHEEL SPEED SENSOR

Turn the ignition off.

Connect the Rear Wheel Speed Sensor harness connector.

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

NOTE: The resistance should be approximately 1600–2300 ohms at 76 degrees F.

Is the resistance within the noted range?

Yes

>> Go to 15

No

>> Replace the Rear Wheel Speed Sensor in accordance with the Service Information.

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

15.

CONTROLLER ANTI-LOCK BRAKE

Turn the ignition off.

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

>> Replace the Controller Anti-lock Brake in accordance with the Service Information.

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

DR/DH

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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