RAM 3500 Chassis Cab Truck 2WD L6-6.7L DSL Turbo (2010)
1. Reconnect the Tow/Haul Overdrive Off switch harness connector.
2. Measure the resistance between ground and the O/D Tow/Haul Switch Sense circuit in the ECM C2 harness connector.
3. Press the Tow/Haul Overdrive Off switch button.
Does the resistance change from above 5.0 ohms to below 5.0 ohms while pressing the Tow/Haul Overdrive Off switch button?
Yes
-
Using the schematics as a guide, check the Engine Control Module (ECM) pins, terminals, and connectors for corrosion, damage, or terminal push
out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the ECM.
-
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
-
Replace the Tow/Haul Overdrive Off switch.
-
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
