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P0974-TRANSMISSION OVERDRIVE CIRCUIT VOLTAGE TOO HIGH (DIESEL) (CONTINUED) 6. CHECK THE 3-4 SOLENOID Turn the ignition off to the lock position. Disconnect the Transmission Solenoid Assembly harness connector. NOTE: Check connectors - Clean/repair as necessary With the scan tool, actuate the 3-4 (Overdrive) Solenoid. Using a 12-volt test light connected to 12-volts, check the 3-4 Solenoid NOTE: The test light must illuminate brightly. Compare the bright- Does the test light cycle on and off and illuminate brightly? Yes >> Go To 7 No >> Using the schematics as a guide, check the Engine Control Module (ECM) pins, terminals, and connec- tors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground cir- Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/ 7. INTERMITTENT WIRING AND CONNECTORS The conditions necessary set this DTC are not present at this time. Use the Freeze Frame Data to help duplicate the conditions that set the DTC. Pay particular attention to the DTC Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Refer to any technical service bulletins that may apply. Were there any problems found? Yes >> Repair as necessary. Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/ No >> Test Complete. 21 - 880 AUTOMATIC TRANSMISSION - 48RE - DIESEL - ELECTRICAL DIAGNOSTICS DR/DH |