Inspection Procedure

INSPECT FUSE (ECU-B, AM2, MAIN)
1. Remove the MAIN fuse from the engine room R/B.
2. Remove the ECU-B and AM2 fuses from the instrument panel J/B.
3. Measure the resistance of the fuses.
Standard: Below 1 Ω
1. NG: REPLACE FUSE
OK: Go To Next Step
CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - BATTERY AND BODY GROUND)
1. Disconnect the T10 ECU connector.
2. Measure the resistance and voltage of the wire harness side connector.
Fig 1: Transponder Key ECU Assy Terminal Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Tester Connection Specified Condition
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go To Next Step

REPLACE TRANSPONDER KEY ECU ASSY