Diagnostic Test

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

Possible Causes
(A909) (A412) FUSED B(+) CIRCUITS OPEN OR SHORTED
(Z911) GROUND CIRCUITS OPEN
(F943) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN OR SHORTED
(D264) AND (D265) CAN INTERIOR (IHS) BUS (125K) CIRCUITS OPEN
CLUSTER (CCN)

TEST FOR INTERMITTENT CONDITION
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. Using 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
  - 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.
(A909) (A412) FUSED B(+) CIRCUIT OPEN OR SHORTED

Fig 1: Using 12-volt Test Light Connected To Ground To Check Each Fused B(+) Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C1 and C3 harness connectors.
3. Using a 12-volt test light connected to ground, check each (A909) and (A412) Fused B(+) circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 3.
  No
  - Repair the open or short to ground in the (A909) or (A412) Fused B(+) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Z911) GROUND CIRCUIT OPEN

Fig 2: Using 12-volt Test Light Connected To 12-volts To Check Each Ground Circuit
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to 12-volts, check each (Z911) Ground circuit.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (Z911) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(F943) FUSED IGNITION RUN/START CONTROL OUTPUT CIRCUIT OPEN OR SHORTED

Fig 3: Using 12-volt Test Light Connected To Ground To Check Fused Ignition Run/Start Control Output Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F943) Fused Ignition Run/Start Control Output circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5.
  No
  - Repair the open or short to ground in the (F943) Fused Ignition Run/Start Control Output circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(D265) OR (D264) CAN IHS BUS (125K) CIRCUIT OPEN

Fig 4: Measuring Resistance Of CAN IHS Bus (-)/(+) Circuit Between TIPM Harness Connector And Cluster Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (D264) CAN IHS Bus (-) (125K) circuit between the TIPM C7 harness connector and the Cluster C3 harness connector.
2. Measure the resistance of the (D265) CAN IHS Bus (+) (125K) circuit between the TIPM C7 harness connector and the Cluster C3 harness connector.
  Is resistance below 5.0 Ohms on both circuits?
  
  Yes
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open in the (D265) or (D264) CAN IHS Bus (125K) circuit. Inspect the connector for damage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .