Inspection Procedure

1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the item "CANCEL SW, SET/COAST SW, RES/ACC SW, MAIN SW" in the DATA LIST and read its value displayed on the hand-held tester.

OK: 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

NG: Go to next step 

1. Remove ECM with the connector.
2. Turn the ignition switch to ON.
3. Measure the voltage between terminal CCS of ECM connector and body ground when each of the SET/-, RES/+ and CANCEL is turned ON.
Fig 1: Identifying ECM Connector Terminal CCS (1MZ-FE, 3MZ-FE)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: 

Fig 2: Identifying ECM Connector Terminal CCS (2AZ-FE)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

NG: Go to next step 

1. Remove the steering wheel center pad.
2. Disconnect the control switch connector.
3. Measure the resistance between terminal CCS and ECC of the control switch connector when the control switch is operated.

Fig 3: Identifying Cruise Control Switch Connector Terminals CCS And ECC

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OK: 

NG: REPLACE CRUISE CONTROL MAIN SWITCH 

OK: Go to next step 

1. Check for open and short circuit in the harness and the connector between terminal CCS of ECM and terminal CCS of the cruise control switch (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
2. Check for open and short circuit in the harness and the connector between terminal ECC of the cruise control switch and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE