Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Toyota RAV4, 2002 Toyota RAV4, 2002 Toyota Highlander, 2001 Toyota RAV4, and 2001 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- Access ECM. See Figure or Figure . Turn ignition switch to the ON position. Using a DVOM, measure voltage by backprobing between ECM harness connector E6 terminal No. 24 (White wire) and ground. If 10-14 volts is present, substitute known good ECM and retest. If voltage is not as specified, go to next step.
- Turn ignition switch to the OFF position. Disconnect cruise control ECU harness connector, located behind instrument panel on driver's side of vehicle. Turn ignition switch to the ON position. Using a DVOM, measure voltage between cruise control harness connector terminal No. 14 (White wire) 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 or connectors between cruise control ECU and ECM. If circuit and connectors are okay, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE.