Inspection Procedure

CHECK FUSE (ECU-IG)
1. Remove the ECU-IG fuse from instrument panel junction block.
2. Check continuity of ECU-IG fuse.
  
  Fig 1: Locating ECU-IG Fuse In Instrument Panel Junction Block
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard: Continuity
1. NG: REPLACE FUSE
2. OK: GO TO NEXT STEP
INSPECT CRUISE CONTROL ECU ASSEMBLY (+B, BODY GROUND)
1. Remove the ECU with connector still connected.
2. Turn ignition switch ON.
3. Measure voltage between terminals +B (C15-2) and GND (C15-16) of ECU connector.
  
  Fig 2: Identifying ECU Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard: 10 - 14 V
1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE See PROBLEM SYMPTOMS TABLE .
2. NG: GO TO NEXT STEP
CHECK HARNESS AND CONNECTOR (GND, BODY GROUND)
1. Measure resistance between terminal GND (C15-16) of ECU connector and body ground.
  Standard: Below one ohm
Fig 3: Identifying ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY <--> CRUISE CONTROL ECU)