Dodge Dakota (ND). Manual — part 76
C102B-REAR WHEEL SPEED SENSOR CIRCUIT (EBC125) (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on and no system under voltage or over voltage condition present.
•
Set Condition:
If the measured wheel speed sensor feedback voltage is less than .277 volts, the sensor is considered open.
If the measured wheel speed sensor feedback voltage is greater than 1.277 volts, or if a sensor over current
condition is detected, the sensor is considered shorted.
If a shorted or open condition is present for more than 100 msec, the DTC will set.
Possible Causes
INTERMITTENT REAR WHEEL SPEED SENSOR DTC
(B222) REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORT TO GROUND
(B22) REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
(B222) REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
(B22) REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
(B222) REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(B22) REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(B222) REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B22) REAR WHEEL SPEED
SENSOR SIGNAL CIRCUIT
TONE WHEEL
EXCESSIVE REAR WHEEL SPEED SENSOR AIR GAP
WHEEL BEARING
REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE MODULE
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, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go To 2
No
>> Go To 15
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
ND
C102B-REAR WHEEL SPEED SENSOR CIRCUIT (EBC125) (CONTINUED)
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
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
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C102B-REAR WHEEL SPEED SENSOR CIRCUIT (EBC125) (CONTINUED)
6.
(B222) REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Rear Wheel Speed Sensor harness connector.
Disconnect the Anti-lock Brake Module harness connector.
NOTE: Check connector - Clean/repair as necessary.
Measure the resistance between the (B222) Rear Wheel Speed Sen-
sor Supply circuit and ground.
Is the resistance above 5.0 ohms?
Yes
>> Go To 7
No
>> Repair the (B222) Rear Wheel Speed Sensor Supply cir-
cuit for a short to ground.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES/ELECTRICAL - DIAGNOSIS AND TESTING)
7.
(B22) REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between the (B22) Rear Wheel Speed Sensor
Signal circuit and ground.
Is the resistance above 5.0 ohms?
Yes
>> Go To 8
No
>> Repair the (B22) Rear Wheel Speed Sensor Signal 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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C102B-REAR WHEEL SPEED SENSOR CIRCUIT (EBC125) (CONTINUED)
8.
(B222) REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
Measure the resistance of the (B222) Rear Wheel Speed Sensor Sup-
ply circuit.
Is the resistance below 5 ohms?
Yes
>> Go To 9
No
>> Repair the open (B222) Rear Wheel Speed Sensor Supply
circuit.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES/ELECTRICAL - DIAGNOSIS AND TESTING)
ND
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 77
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