Dodge Ram Truck 1500-2500-3500. Manual — part 157

NO SIGNAL FROM LEFT FRONT SENSOR - 26 (CONTINUED)

8.

LEFT FRONT WHEEL SPEED SENSOR (+) CIRCUIT OPEN

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

Is the resistance below 5.0 ohms?

Yes

>> Go To 9

No

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

cuit.

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

9.

LEFT FRONT WHEEL SPEED SENSOR (-) CIRCUIT OPEN

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

Is the resistance below 5.0 ohms?

Yes

>> Go To 10

No

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

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

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NO SIGNAL FROM LEFT FRONT SENSOR - 26 (CONTINUED)

10.

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

Turn the ignition on.

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

Is there any voltage present?

Yes

>> Repair Left 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

11.

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

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

Is there any voltage present?

Yes

>> Repair the Left 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 12

DR/DH

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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NO SIGNAL FROM LEFT FRONT SENSOR - 26 (CONTINUED)

12.

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

Turn the ignition off.

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

Is the resistance below 5.0 ohms?

Yes

>> Repair Left Front Wheel Speed Sensor (+) circuit for a

short to the Left Front Wheel Speed Sensor (-) circuit.

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

No

>> Go To 13

13.

LEFT FRONT WHEEL SPEED SENSOR

Turn the ignition off.

Connect the Left Front Wheel Speed Sensor harness connector.

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

NOTE: The resistance should be approximately 1800–2200 ohms at 76 degrees F.

Is the resistance within the noted range?

Yes

>> Go to 14

No

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

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

14.

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)

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NO SIGNAL FROM LEFT FRONT SENSOR - 26 (CONTINUED)

15.

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.

DR/DH

BRAKES - ABS - ELECTRICAL DIAGNOSTICS

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