Overdrive Cancel Signal (CELICA)
WARNING: This page is about a different car, the 2002 Toyota ECHO, 2002 Toyota Celica, 2001 Toyota ECHO, and 2001 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
- Access the ECM, located in engine compartment, near battery. See Figure. Turn ignition switch to ON position. Using a DVOM, measure voltage (backprobe) between terminal OD1 of appropriate ECM harness connector and ground. See Figure. If 10-14 volts is present, substitute known-good ECM and retest. If voltage is not as specified, go to next step.
- Turn ignition off. Disconnect cruise control ECU harness connector located behind instrument panel, on driver's side of vehicle. Turn ignition on. Measure voltage between terminal O/D and ground. See Fig 1. If 10-14 volts is present, replace cruise control ECU and retest. If 10-14 volts is not present, check and repair circuit between cruise control ECU and ECM. If circuit is okay, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE.