Dodge Ram Truck 1500-2500-3500. Manual — part 160

NO SIGNAL FROM RIGHT FRONT SENSOR — 22 (CONTINUED)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Ignition on.

•

Set Condition:
One sensor is unable to reach 4 MPH while the remaining sensors are indicating above 8 MPH.

Possible Causes

INTERMITTENT LEFT FRONT WHEEL SPEED SENSOR DTC

RIGHT FRONT WHEEL SPEED SENSOR (+) CIRCUIT SHORT TO GROUND

RIGHT FRONT WHEEL SPEED SENSOR (-) CIRCUIT SHORT TO GROUND

RIGHT FRONT WHEEL SPEED SENSOR (+) CIRCUIT OPEN

RIGHT FRONT WHEEL SPEED SENSOR (-) CIRCUIT OPEN

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

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

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

TONE WHEEL

EXCESSIVE LEFT FRONT WHEEL SPEED SENSOR AIR GAP

WHEEL BEARING

RIGHT FRONT 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 15

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 - 68

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

DR/DH

NO SIGNAL FROM RIGHT FRONT SENSOR — 22 (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.

RIGHT FRONT WHEEL SPEED SENSOR (+) CIRCUIT
SHORTED TO GROUND

Turn the ignition off.

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

Is the resistance above 5.0 ohms?

Yes

>> Go To 7

No

>> Repair the Right 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 - 69

NO SIGNAL FROM RIGHT FRONT SENSOR — 22 (CONTINUED)

7.

RIGHT FRONT WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO GROUND

Measure the resistance between the Right Front Wheel Speed Sensor
(-) circuit and ground.

Is the resistance above 5.0 ohms?

Yes

>> Go To 8

No

>> Repair the Right Front Wheel Speed Sensor (-) circuit for

a short to ground.

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

8.

RIGHT FRONT WHEEL SPEED SENSOR (+) CIRCUIT OPEN

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

Is the resistance below 5.0 ohms?

Yes

>> Go To 9

No

>> Repair the open Right Front Wheel Speed Sensor (+) cir-

cuit.

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

5 - 70

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

DR/DH

NO SIGNAL FROM RIGHT FRONT SENSOR — 22 (CONTINUED)

9.

RIGHT FRONT WHEEL SPEED SENSOR (-) CIRCUIT OPEN

Measure the resistance of the Right Front Wheel Speed Sensor (-) cir-
cuit.

Is the resistance below 5.0 ohms?

Yes

>> Go To 10

No

>> Repair the open Right Front Wheel Speed Sensor (-) cir-

cuit.

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

10.

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

Turn the ignition on.

Measure the voltage of the Right Front Wheel Speed Sensor (+) cir-
cuit.

Is there any voltage present?

Yes

>> Repair Right Front 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 11

DR/DH

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

5 - 71