Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (ECU-IG)
1. Remove the ECU - IG fuse from the driver side J/B.
2. Check the continuity of ECU - IG fuse.
  Standard:
  
  Below 1 Ω
1. NG : REPLACE FUSE
2. OK : Go to next step.
CHECK WIRE HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - BODY GROUND)
1. Remove the distance control ECU with connector.
2. Check the continuity between terminal SGND (D2-10) and GND (D2-12) of distance control ECU and body ground.
  Standard:
  
  Below 1 Ω
Fig 1: Checking Continuity Between Terminal SGND (D2-10) And GND (D2-12) Of Distance Control ECU And Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK : Go to next step.
CHECK WIRE HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - BATTERY)
1. Measure the voltage between terminal B (D2-1) of distance control ECU and body ground.
  Standard:
  
  10 to 14 V
Fig 2: Measuring Voltage Between Terminal B (D2-1) Of Distance Control ECU And Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE .