Inspection Procedure
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota RAV4, 2002 Toyota Highlander, 2002 Toyota Camry, 2002 Lexus RX 300, and 2001 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- Warm up the engine. Turn ignition off. Connect the scan tool or hand-held tester to the DLC3. Turn ignition on and turn ON the scan tool or hand-held tester. Select the item OVERDRV CUT SW1 in the DATA LIST and read its value displayed on the OBD-II scan tool or hand held tester. See Fig 1. If scan tool parameters are within specification, install a known-good ECM, if problem is gone, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. If parameters are not within specification, go to next step.
- Disconnect the transmission control switch connector. Check for continuity between terminals No. 2 and 4 of transmission control switch. See Figure and Fig 2 . If continuity is as specified, go to next step. If not, replace transmission control switch.
- Connect the transmission control switch connector. Check for continuity between terminals ODMS and E1 of ECM. See Fig 3. If continuity is as specified, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. If not, repair or replace wiring harness and connector.