Inspection Procedure

Check voltage between terminals CCS of ECM connector and body ground.
PREPARATION:
1. Remove the ECM with connector still connected.
2. Turn the ignition switch to ON.
CHECK:

Measure voltage between terminals CCS of ECM connector and body ground, when each of the SET/COAST, RESUME/ACCEL and CANCEL is turned ON.

Fig 1: Checking Voltage Between Terminals CCS Of ECM Connector And Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Switch Position Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Proceed to next circuit inspection shown in problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. OK: Go to Next Step
Check control switch continuity.
PREPARATION:
1. Remove the steering wheel pad (See REMOVAL ).
2. Disconnect the control switch connector.
CHECK:

Measure the resistance between terminals 4 and 5 of control switch connector when control switch is operated.

Fig 3: Checking Control Switch Continuity Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Switch Continuity Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace control switch.
2. OK: Go to Next Step
Check main switch continuity.
PREPARATION:
1. Remove the steering wheel pad (See REMOVAL ).
2. Disconnect the control switch connector.
CHECK:

Check the continuity between terminals 4 and 5 of control switch connector when main switch is held ON and OFF.

OK:

Fig 5: Checking Main Switch Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Main Switch Continuity Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace control switch.
2. OK: Go to Next Step
Check harness and connector between ECM and cruise control switch, cruise control switch and body ground (See O/D DIRECT CLUTCH SPEED SENSOR ).
1. NG: Repair or replace harness or connector.
2. OK: Go to Next Step
Check cruise control indicator light (See COMBINATION METER ).
1. NG: Replace combination meter.
2. OK: Go to next step.
  Check and replace ECM (See O/D DIRECT CLUTCH SPEED SENSOR ).