Diagnostic Test

WARNING: This page is about a different car, the 2012 Jeep Liberty. 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.
1. Turn the ignition on.
  NOTE:
  Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. 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.
  
  NOTE:
  Check the TIPM for any active CAN C hardware DTCs, perform DTC before proceeding.
  
  Does the scan tool display a red "X" next to the module?
  
  Yes
  - Go To 2.
  No
  - 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.
(A209) FUSED B(+) CIRCUITS OPEN OR SHORTED

Fig 1: Checking Fused B (+) Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the PCM C1 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 the PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position) to perform diagnosis.
3. Using a 12-volt test light connected to ground, check the (A209) Fused B(+) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3.
  No
  - Repair the (A209) Fused B(+) circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
(Z933) GROUND CIRCUITS OPEN

Fig 2: Checking Each Ground Circuits Using 12-Volt Test Light Connected To 12 Volts
Courtesy of CHRYSLER GROUP, LLC
1. Using a 12-volt test light connected to 12-volts, check each (Z933) ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 4.
  No
  - Repair the ground circuit for an open.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
(F202) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN OR SHORTED

Fig 3: Checking Fused Run/Start Relay Output Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F202) Fused Run/Start Relay Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5.
  No
  - Repair the (F202) Fused Run/Start Relay Output circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
(F1) IGNITION SWITCH OUTPUT (UNLOCK/RUN/START) CIRCUIT OPEN OR SHORTED

Fig 4: Checking Fused Ignition Switch Output (Unlock/Run/Start) Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F1) Ignition Switch Output (Unlock/Run/Start) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 6.
  No
  - Repair the (F1) Ignition Switch Output (Unlock/Run/Start) circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
(F342) FUSED ASD RELAY OUTPUT CIRCUIT OPEN OR SHORTED

Fig 5: Checking Fused ASD Relay Output Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F342) Fused ASD Relay Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 7.
  No
  - Repair the (F342) Fused ASD Relay Output circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
(D65) CAN C BUS (+) CIRCUIT OPEN

Fig 6: Measuring Resistance Of CAN C Bus (+) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM connector and the appropriate terminal of the special tool (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go To 8.
  No
  - Repair the (D65) CAN C Bus (+) circuit for an open.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
(D64) CAN C BUS (-) CIRCUIT OPEN

Fig 7: Measuring Resistance Of CAN C Bus (-) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM connector and the appropriate terminal of the special tool (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace and program the Powertrain Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
  No
  - Repair the (D64) CAN C Bus (-) circuit for an open.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .