RAM 3500 Chassis Cab Truck 2WD L6-6.7L DSL Turbo (2010)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Transmission Control Systems/Testing and Inspection
1. TOW/HAUL OVERDRIVE OFF SWITCH SENSE CIRCUIT SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the ECM C2 harness connector.
3. Disconnect the Tow/Haul Overdrive Off switch harness connector.
4. Measure the resistance between ground and the Tow/Haul Overdrive Off switch sense circuit in the ECM C2 harness connector.
Is the resistance below 5.0 ohms?
Yes
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Repair the Tow/Haul Overdrive Off switch sense circuit for a short to ground.
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Perform the TRANSMISSION VERIFICATION TEST (DIESEL). See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests
No
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Go To 2
2. CHECK THE TOW/HAUL OVERDRIVE OFF SWITCH
