Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes
A-604 FUSED B(+) CIRCUITS OPEN OR SHORTED
(Z908) GROUND CIRCUITS OPEN
(F202) IGNITION RUN/START CONTROL OUTPUT CIRCUIT OPEN OR SHORTED
(F1) FUSED IGNITION OFF/RUN/START CONTROL OUTPUT CIRCUIT OPEN OR SHORTED
(F342) FUSED ASD RELAY OUTPUT CIRCUIT OPEN OR SHORTED
(D65) CAN C BUS (+) CIRCUIT OPEN
(D64) CAN C BUS (-) CIRCUIT OPEN
POWERTRAIN CONTROL MODULE (PCM)

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:
  Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the TIPM 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 diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  No
  - Go To 2.
CHECK FOR LOSS OF COMMUNICATION WITH PCM
1. With the scan tool, read the active DTCs.
  Does the scan tool display U0100-LOST COMMUNICATION WITH ECM/PCM?
  
  Yes
  - Refer to NO RESPONSE FROM TCM (POWERTRAIN CONTROL MODULE) - GAS and perform the diagnostic procedure.
  No
  - Go To 3.
CHECK THE (Z908) GROUND CIRCUITS FOR AN OPEN

Fig 1: Using 12-Volt Test Light To Check Each Ground Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM C4 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 12-volts, check the (Z908) Ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, Powertrain Control , Removal r .
  - Perform the appropriate TRANSMISSION VERIFICATION TEST.
  No
  - Repair the open in the (Z908) Ground circuit.
  - Perform the appropriate TRANSMISSION VERIFICATION TEST.