Inspection Procedure

INSPECT FUSE (ECU-IG)
1. Remove the ECU-IG fuse from the instrument panel J/B.
2. Check the continuity of the ECU-IG fuse.
  
  Fig 1: Identifying Instrument Panels ECU - IG Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: Continuity
1. NG: REPLACE FUSE
2. OK: GO TO NEXT STEP.
INSPECT TERMINAL VOLTAGE (B)
1. Remove the cruise control ECU assy with connector still connected.
2. Turn the ignition switch to ON.
3. Measure voltage between terminals 2 (B) and 16 (GND) of the cruise control ECU assy connector.
  
  Fig 2: Identifying +B (+) & GND (-) Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK:
  
  Voltage: 10 - 16 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 (BETWEEN CRUISE CONTROL ECU ASSY AND BODY GROUND)
1. Measure resistance between terminal 16 (GND) of the cruise control ECU assy connector and body ground.
  
  Fig 3: Identifying GND Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK:
  
  Resistance: Below 1 Ω
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: CHECK AND REPAIR HARNESS AND CONNECTOR BETWEEN CRUISE CONTROL ECU ASSY AND BATTERY