Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
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.
  
  Does the scan tool display a red X next to the module?
  
  Yes
  - Go to step 2
  No
  - The no response condition is not present at this time. Using the SYSTEM WIRING DIAGRAMS 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.
FUSED IGNITION SWITCH CIRCUIT OPEN OR SHORTED

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1. Disconnect the Steering Control Module C1 harness connector.
2. Using a 12-volt test light connected to ground, check the Fused Ignition Switch circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 3
  No
  - Repair the Fused Ignition Switch circuit for an open or short.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
GROUND CIRCUIT OPEN

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1. Turn the ignition off.
2. Disconnect the Steering Control Module C2 harness connector.
3. Using a 12-volt test light connected to 12-volts, check the ground circuits.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Go to step 4
  No
  - Repair the ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
CAN C BUS (+) CIRCUIT OPEN

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1. Disconnect the Ignition Switch C4 harness connector.
2. Measure the resistance of the CAN C Bus (+) circuit between the Ignition Switch connector and the SCM connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the CAN C Bus (+) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
CAN C BUS (-) CIRCUIT OPEN

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1. Measure the resistance of the CAN C Bus (-) circuit between the Ignition Switch connector and the SCM connector.
  Is resistance below 5.0 ohms?
  
  Yes
  - Replace the Steering Control Module in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
  No
  - Repair the CAN C Bus (-) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .