Inspection Procedure

NOTE:

In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held tester, start from step 3.

READ VALUE OF OBD II SCAN TOOL OR TOYOTA HAND-HELD TESTER (ECT)
1. Connect the hand-held tester to the DLC3.
2. Check the automatic transmission using DATA LIST.
1. NG: GO TO ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION [ECT]
2. OK: GO TO NEXT STEP
READ VALUE OF OBD II SCAN TOOL OR TOYOTA HAND-HELD TESTER (ODI)
1. Connect the hand-held tester to the DLC3.
2. Check the cruise control ECU using DATA LIST.
1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE See PROBLEM SYMPTOMS TABLE .
2. NG: GO TO NEXT STEP

INSPECT CRUISE CONTROL ECU ASSEMBLY (ECT, BODY GROUND)

Connect the ECU connector.
Perform the test drive after engine warms up.
Check voltage between terminal ECT (C15-6) of ECU connector and body ground when OD switch is ON and OFF.

Fig 1: Identifying Cruise Control ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VOLTAGE CHECK

OD Switch Position	Voltage
ON	8 - 14 V
OFF	Below 0.5 V

INSPECT CRUISE CONTROL ECU ASSEMBLY (OD, BODY GROUND)
1. Remove the ECU with the connector still connected.
2. Turn ignition switch ON.
3. Disconnect the ECU connector.
4. Measure voltage between terminal OD of harness side connector of ECU and body ground.
  
  Fig 2: Disconnecting ECU Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Voltage: 10 - 14 V
1. OK: CHECK AND REPLACE CRUISE CONTROL ECU ASSEMBLY
2. NG: GO TO NEXT STEP
CHECK HARNESS AND CONNECTOR (BETWEEN CRUISE CONTROL ECU AND ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID) See ELECTRONIC CIRCUIT INSPECTION PROCEDURE .
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: CHECK AND REPLACE ECM See ELECTRONIC CIRCUIT INSPECTION PROCEDURE .