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Home >> Toyota >> 2002 >> RAV4 Base, AWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Control System Self-Diagnostics) >> Diagnostic Tests >> DTC P1127: Electronic Throttle Control System Actuator Power Source Circuit >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove THROTTLE fuse (15-amp) from fuse/relay box at driver's side front corner of engine compartment. Inspect THROTTLE fuse. If THROTTLE fuse is okay, reinstall fuse and go to next step. If THROTTLE fuse is defective, replace fuse and check for short in Yellow/Black wire between THROTTLE fuse and ECM. See WIRING DIAGRAMS article. ECM is located behind glove box. See Figure. Repair wiring as necessary.
  2. Remove glove box for access to ECM with electrical connectors still installed on ECM. See Figure. Using voltmeter, check voltage between body ground and terminal No. 7 (Yellow/Black wire) at ECM electrical connector E9. See Figure. This is the +BM terminal on ECM. Voltage should be 9-14 volts. If voltage is within specification, replace ECM. If voltage is not within specification, repair open between battery, THROTTLE fuse and Yellow/Black wire and electrical connectors between THROTTLE fuse and ECM. See WIRING DIAGRAMS article.
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