Diagnostic Test
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- VERIFY THE DTC IS ACTIVE
- Turn the ignition on.
- With the scan tool, read and record the DTCs.
- With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set.
- With the scan tool, erase the DTCs.
- Start the engine.
- With the scan tool, read and record the DTCs.
Is the DTC active at this time?
Yes
- Go To 2
No
- Perform the ABS-INTERMITTENT CONDITION TEST. Refer to STANDARD PROCEDURE .
- INSPECT THE BRAKE PEDAL POSITION (BPP) SENSOR FOR INCORRECT INSTALLATION, DAMAGE OR MECHANICAL FAILURE
- Turn the ignition off.
- Visually inspect the BPP Sensor for Improper installation, damage or mechanical failure. Refer to SWITCH, STOP LAMP, INSTALLATION
.
Were any problems found?
Yes
- Repair as necessary.
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Go To 3
- (B237) BPP SENSOR SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
- Disconnect the Brake Pedal Travel Sensor harness connector.
- Disconnect the ABS Module harness connector.
- Measure the resistance of the (B237) BPP Sensor Supply circuit between the BPP Sensor harness connector and the ABS Module harness connector.
Is the resistance below 5.0 Ohms?
Yes
- Go To 4
No
- Repair the (B137) BPP Sensor Signal circuit for an open circuit or high resistance.
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- (B137) BPP SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
- Measure the resistance of the (B137) BPP Sensor Signal circuit between the BPP Sensor harness connector and the ABS Module harness connector.
Is the resistance below 5.0 Ohms?
Yes
- Go To 5
No
- Repair the (B137) BPP Sensor Signal circuit for an open circuit or high resistance.
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- Measure the resistance of the (B137) BPP Sensor Signal circuit between the BPP Sensor harness connector and the ABS Module harness connector.
- (B137) BPP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
- Measure the resistance between ground and the (B137) BPP Sensor Signal circuit in the BPP Sensor harness connector.
Is the resistance above 5 Ohms?
Yes
- Go To 6
No
- Repair the (137) BPP Signal circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- Measure the resistance between ground and the (B137) BPP Sensor Signal circuit in the BPP Sensor harness connector.
- (B137) BPP SENSOR SIGNAL CIRCUIT SHORTED TO THE (B937) BPP SENSOR RETURN CIRCUIT
- Measure the resistance between ground and the (B937) BPP Sensor Return circuit and the (B137) BPP Sensor Signal circuit in the BPP Sensor harness connector.
Is the resistance above 5 Ohms?
Yes
- Go To 7
No
- Repair the (B137) BPP Sensor Signal circuit and the (B937) BPP Sensor Return circuit for a short.
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- Measure the resistance between ground and the (B937) BPP Sensor Return circuit and the (B137) BPP Sensor Signal circuit in the BPP Sensor harness connector.
- BRAKE PEDAL POSITION (BPP) SENSOR
- Replace the Brake Pedal Position (BPP) Sensor in accordance with the Service Information.
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .WARNING:
To avoid possible serious or fatal injury, check brake capability is available before road testing.
- Test drive the vehicle on mainly straight road conditions at a velocity between 15 and 35 km/h (9 and 22 mph).
- With the scan tool, read the DTCs.
Does the DTC remain active?
Yes
- Replace the Anti-lock Brake System (ABS) Module in accordance with the service information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL .
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Test complete.