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.

CHECK THE (A917) AND (A919) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT CIRCUIT
1. Turn the ignition off.
2. Disconnect the EPB Module harness connector.
3. Using a 12-volt test light connected to ground, check each (A917) and (A919) Fused B(+) circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 2
  No
  - Repair the Fused B(+) circuits for an open or short.
  - Perform the EPB VERIFICATION TEST. Refer to EPB VERIFICATION TEST .
CHECK THE (F941) FUSED RUN/START CONTROL OUTPUT CIRCUIT FOR AN OPEN OR SHORT CIRCUIT
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F941) Fused Run/Start Control Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the (F941) Fused Run/Start Control Output circuit for an open or short.
  - Perform the EPB VERIFICATION TEST. Refer to EPB VERIFICATION TEST .
CHECK THE (Z923) GROUND CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
1. Using a 12-volt test light connected to 12-volts, check the (Z923) Ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 4
  No
  - Repair the (Z923) Ground circuits for an open or high resistance.
  - Perform the EPB VERIFICATION TEST. Refer to EPB VERIFICATION TEST .
(D61) CAN C BUS (+) CIRCUIT OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the CAN C Body C13 Star harness connector.
3. Measure the resistance of the (D61) CAN C Bus (+) circuit between the CAN C Body C13 Star harness connector and the ABS Module harness connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (D61) CAN C Bus (+) circuit for an open or high resistance.
  - Perform the EPB VERIFICATION TEST. Refer to EPB VERIFICATION TEST .
(D60) CAN C BUS (-) CIRCUIT OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (D60) CAN C Bus (-) circuit between the CAN C Body C13 Star harness connector and the ABS Module harness connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Replace the Electric Parking Brake (EPB) Module in accordance with service information. Refer to MODULE, ELECTRIC PARK BRAKE (EPBM), REMOVAL .
  - Perform the EPB VERIFICATION TEST. Refer to EPB VERIFICATION TEST .
  No
  - Repair the (D60) CAN C Bus (-) circuit for an open or high resistance.
  - Perform the EPB VERIFICATION TEST. Refer to EPB VERIFICATION TEST .