Diagnostic Test
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
- TEST FOR INTERMITTENT CONDITION NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
- Turn the ignition on.NOTE:
Make sure the battery voltage is between 10.0 and 16.0 volts.
- With the scan tool, read the module status.NOTE:
Check the BCM for any active CAN hardware DTCs, perform DTC before proceeding.
Does the scan tool indicate that the module is active on the bus?
Yes
- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 2
- Turn the ignition on.
- CHECK THE (A107) AND (A200) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT CIRCUIT
- Turn the ignition off.
- Disconnect the ABS Module harness connector.
- Using a 12-volt test light connected to ground, check each (A107) and (A200) Fused B(+) circuit.
Does the test light illuminate brightly for each circuit?
Yes
- Go To 3
No
- Repair the Fused B(+) circuits for an open or short.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- CHECK THE (F941) FUSED RUN/START RELAY OUTPUT CIRCUIT FOR AN OPEN OR SHORT CIRCUIT
- Turn the ignition on.
- Using a 12-volt test light connected to ground, check the (F941) Fused Run/Start Relay Output circuit.
Does the test light illuminate brightly?
Yes
- Go To 4
No
- Repair the (F941) Fused Run/Start Relay Output circuit for an open or short.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- CHECK THE (Z905) GROUND CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
- Using a 12-volt test light connected to 12-volts, check the (Z905) Ground circuits.
Does the test light illuminate brightly for each circuit?
Yes
- Go To 5
No
- Repair the (Z905) Ground circuits for an open or high resistance.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- Using a 12-volt test light connected to 12-volts, check the (Z905) Ground circuits.
- (D79) CAN C BUS (+) CIRCUIT OPEN OR HIGH RESISTANCE
- Turn the ignition off.
- Disconnect the CAN C Dash C4 Star harness connector.
- Measure the resistance of the (D79) CAN C Bus (+) circuit between the CAN C Body C4 Star Connector and the ABS Module harness connector.
Is resistance below 5.0 Ohms?
Yes
- Go To 6
No
- Repair the (D79) CAN C Bus (+) circuit for an open or high resistance.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- (D80) CAN C BUS (-) CIRCUIT OPEN OR HIGH RESISTANCE
- Measure the resistance of the (D80) CAN C Bus (-) circuit between the CAN C Dash C4 Star Connector and the ABS Module harness connector.
Is resistance below 5.0 Ohms?
Yes
- Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL .
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
No
- Repair the (D80) CAN C Bus (-) circuit for an open or high resistance.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- Measure the resistance of the (D80) CAN C Bus (-) circuit between the CAN C Dash C4 Star Connector and the ABS Module harness connector.