Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the ETCS fuse from the engine room junction block. See Fig 1. Check continuity of the ETCS fuse. If okay, go to next step. If not, check for short in all harness and components connected to ETCS fuse.
- Remove the glove compartment door. Measure the voltage between terminal +BM of the ECM connector and body ground. Fig 2 If voltage is 9-14 volts, check and replace ECM. If voltage is not 9-14 volts, check and repair harness or connector between battery and ETCS fuse, and ETCS fuse and ECM.