Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs.
3. Turn the ignition off to the lock position.
4. Ignition on, engine not running.
5. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2.
  No
  - The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
  - Perform the ABS INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
WHEEL SPEED SENSOR INSPECTION
1. Turn the ignition off to the lock position.
2. Inspect the Wheel Speed Sensor for proper mounting.
3. Inspect the Wheel Speed Sensor harness and connector.
4. 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 the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 3.
CHECK (B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT VOLTAGE

Fig 1: Checking Rear Wheel Speed Sensor Supply Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the Left Rear Wheel Speed Sensor harness connector.
2. Turn the ignition on.
3. Measure the voltage between the (B4) Left Rear Wheel Speed Sensor Supply circuit and ground.
  Is the voltage above 10 volts?
  
  Yes
  - Go To 4.
  No
  - Go To 6.
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking Rear Wheel Speed Sensor Supply Circuit For Short
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the ABS Module harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (B4) Left Rear Wheel Speed Sensor Supply circuit.
  Is there any voltage present?
  
  Yes
  - Repair (B4) Left Rear Wheel Speed Sensor Supply circuit for a short to voltage.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 5.
(B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

Fig 3: Checking Rear Wheel Speed Sensor Signal Circuit For Short
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between the (B3) Left Rear Wheel Speed Sensor Signal circuit and ground.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Replace the Left Rear Wheel Speed Sensor in accordance with the Service Information.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Repair the (B3) Left Rear Wheel Speed Sensor Signal circuit for a short to ground.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND

Fig 4: Checking Rear Wheel Speed Sensor Supply Circuit For Short
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the ABS Module harness connector.
3. Measure the resistance between the (B4) Left Rear Wheel Speed Sensor Supply circuit and ground.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Go To 7.
  No
  - Repair the (B4) Left Rear Wheel Speed Sensor Supply circuit for a short to ground.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN

Fig 5: Checking Rear Wheel Speed Sensor Supply Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (B4) Left Rear Wheel Speed Sensor Supply circuit between the ABS harness connector and the Left Rear Wheel Speed Sensor harness connector.
  Is the resistance below 5 Ohms?
  
  Yes
  - Go To 8.
  No
  - Repair the open (B4) Left Rear Wheel Speed Sensor Supply circuit.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
(B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN

Fig 6: Checking Rear Wheel Speed Sensor Signal Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (B3) Left Rear Wheel Speed Sensor Signal circuit between the ABS harness connector and the Left Rear Wheel Speed Sensor harness connector.
  Is the resistance below 5 Ohms?
  
  Yes
  - Go To 9.
  No
  - Repair the open (B3) Left Rear Wheel Speed Sensor Signal circuit.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
(B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 7: Checking Rear Wheel Speed Sensor Supply Circuit For Short
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage of the (B3) Left Rear Wheel Speed Sensor Signal circuit at the Left Rear Wheel Speed Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (B3) Left Rear Wheel Speed Sensor Signal circuit for a short to voltage.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 10.
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT

Fig 8: Checking Rear Wheel Speed Sensor Signal & Supply Circuit For Short
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Measure the resistance between the (B4) Left Rear Wheel Speed Sensor Supply circuit and the (B3) Left Rear Wheel Speed Sensor Signal circuit at the ABS Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair (B4) Left Rear Wheel Speed Sensor Supply circuit for a short to the (B3) Left Rear Wheel Speed Sensor Signal circuit.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Anti-Lock Brakes Module in accordance with the Service Information.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .