Diagnostic Test

WARNING: This page is about a different car, the 2007 Jeep Patriot and 2007 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

1) 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: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU View.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red X next to the module?

Yes
1. Go To step 2).
No
1. 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.
2) (A411) FUSED B(+) CIRCUIT OPEN OR SHORTED

Fig 1: Checking The (A411) Fused B(+) Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Sentry Key Remote Entry Module harness connector.

Using a 12-volt test light connected to ground, check the (A411) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes
1. Go To step 3).
No
1. Repair the (A411) Fused B(+) circuit for an open or short.
2. Perform SKREEM/SKIM VERIFICATION TEST .
3) (Z937) GROUND CIRCUIT OPEN

Fig 2: Checking The (Z937) Ground Circuit
Courtesy of CHRYSLER LLC

Using a 12-volt test light connected to 12-volts, check the (Z937) ground circuit.

Does the test light illuminate brightly?

Yes
1. Go To step 4).
No
1. Repair the (Z937) ground circuit for an open.
2. Perform SKREEM/SKIM VERIFICATION TEST .
4) (F20) IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED

Fig 3: Checking The (F20) Ignition Switch Output Circuit
Courtesy of CHRYSLER LLC

Turn the ignition on.

Using a 12-volt test light connected to ground, check the (F20) Ignition Switch Output circuit.

Does the test light illuminate brightly?

Yes
1. Go To step 5).
No
1. Repair the (F20) Ignition Switch Output circuit for an open or short.
2. Perform SKREEM/SKIM VERIFICATION TEST .
5) (D55) AND (D54) CAN B BUS CIRCUITS OPEN

Fig 4: Measuring Voltage Between CAN B Bus (-) & (+) Circuits And Ground
Courtesy of CHRYSLER LLC

NOTE: One open circuit will not cause this condition.

Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.

Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.

Is there any voltage present on either circuit?

Yes
1. Replace the Sentry Key Remote Entry Module in accordance with the service information.
2. Perform SKREEM/SKIM VERIFICATION TEST .
No
1. Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage.
2. Perform SKREEM/SKIM VERIFICATION TEST .