Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE WIRING AND CONNECTORS

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 GPEC Diagnostic Adaptor to perform the diagnosis.

Important: The GPEC Diagnostic Adaptor can add up to 1.5 Ohms of resistance to the circuit.
Connect the (special tool #10436, Adapter, GPEC Diagnostic) to the appropriate PCM harness connector.
Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage or terminal push out. Pay particular attention to all power and ground circuits.
Wiggle the wires while checking for shorted and open circuits.
Check Service Bulletins that may apply.
Were there any problems found?

Yes
- Repair the power and/or ground circuits as necessary.
- Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .
No
- Replace the PCM in accordance with the Service Information. With the scan tool, perform Quick Learn.
- Perform the TRANSMISSION VERIFICATION TEST. Refer to 66RFE TRANSMISSION VERIFICATION TEST .