Diagnostic Test
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- With the scan tool, read DTCs.
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- Test complete, the condition or conditions that originally set this DTC are 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.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CHECK THE (F982) FUSED IGNITION SWITCH OUTPUT (RUN/ACC) CIRCUIT FOR AN OPEN
- Turn the ignition off.
- Disconnect the Inside Rearview Mirror harness connector.
- Turn the ignition on.
- Using a 12-volt test light connected to ground, check the (F982) Fused Ignition Switch Output (Run/Acc) circuit.
Does the test light illuminate brightly?
Yes
- Go To 3
No
- Repair the open or short to ground in the (F982) Fused Ignition Switch Output (Run/Acc) circuit.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CHECK THE (Z911) GROUND CIRCUIT FOR AN OPEN
- Turn the ignition off.
- Using a 12-volt test light connected to 12-volts, check the (Z911) Ground circuit.
Does the test light illuminate brightly?
Yes
- Go To 4
No
- Repair the open in the (Z911) Ground circuit.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CHECK THE (D402) LIN 2 BUS CIRCUIT FOR AN OPEN
- Turn the ignition on.
- Measure the voltage between ground and the (D402) LIN 2 BUS circuit.
Is the voltage above 5.0 volts?
Yes
- Replace the Inside Rearview Mirror in accordance with the Service Information. Refer to MIRROR, REARVIEW, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Repair the open in the (D402) LIN 2 Bus circuit.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .