Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OUTPUT
1. Delete the DTCs (See DTC CHECK / CLEAR ).
  HINT:
  
  After all DTCs are cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG).
2. Check for DTCs again.
  OK: No DTC is output.
NG: Go to step 2

OK: CHECK INTERMITTENT PROBLEMS
INSPECT FUSE (AM2)
1. Remove the AM2 fuse from the engine room J/B.
2. Measure the resistance of the fuse.
  Standard resistance: Below 1 Ω
NG: REPLACE FUSE

OK: Go to Next Step

CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY)

Disconnect the E60 and E61 ECU connectors.

Measure the voltage according to the value(s) in the table below.

Standard voltage

VOLTAGE SPECIFICATION

Terminal No. (Symbol)	Condition	Specified Condition
E61-6 (AM1) - Body ground	Always	10 to 14 V
E60-1 (AM2) - Body ground	Always	10 to 14 V

Fig 1: Identifying Main Body ECU Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU