Diagnostic Test

1) ACTIVE DTC
Start the engine and allow it to reach normal operating temperature.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

With a scan tool, select View DTCs.

Is the DTC Active at this time?

Yes
1. Go To 2).
No
1. Refer to INTERMITTENT CONDITION Diagnostic Procedure.
2) FUEL PUMP RELAY
Turn the ignition off.

Remove the Fuel Pump Relay from the PDC.

Measure the resistance of the Fuel Pump Relay Coil.

Is the resistance between 70 to 90 ohms?

Yes
1. Go To 3).
No
1. Replace the Fuel Pump Relay.
2. Perform POWERTRAIN VERIFICATION TEST .
3) FUSED B+ CIRCUIT

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

Using a 12-volt test light connected to ground, probe the Fused B+ circuit.

Does the test light illuminate brightly?

Yes
1. Go To 4).
No
1. Repair the open or short to ground in the Fused B+ circuit. Inspect the related fuse and repair as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
4) (F1) FUSED IGNITION SWITCH OUTPUT CIRCUIT

Fig 2: Checking Fused Ignition Switch Output Circuit
Courtesy of CHRYSLER LLC

Ignition on, engine not running.

Using a 12-volt test light connected to ground, probe the (F1) Fused Ignition Switch Output circuit.

Does the test light illuminate brightly?

Yes
1. Go To 5).
No
1. Repair the open or short to ground in the (F1) Fused Ignition Switch Output circuit. Inspect the related fuse and repair as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
5) (K31) FUEL PUMP CONTROL CIRCUIT OPEN

Fig 3: Checking Fuel Pump Control Circuit For Open
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the C3 PCM harness connector.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (K31) Fuel Pump Relay Control circuit from the PDC to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go To 6).
No
1. Repair the open in the (K31) Fuel Pump Relay Control circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
6) (K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO GROUND

Fig 4: Checking Fuel Pump Relay Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (K31) Fuel Pump Relay Control circuit in the PDC.

Is the resistance below 100 ohms?

Yes
1. Repair the short to ground in the (K31) Fuel Pump Relay Control circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go To 7).
7) PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

Were there any problems found?

Yes
1. Repair as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Replace and program the Powertrain Control Module per Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .