Inspection Procedure

Check voltage between terminal CCS of ECM connector and body ground .
PREPARATION:
1. Remove the ECM with connector being connected.
2. Turn the ignition switch on.
CHECK:

Measure the voltage between terminals CCS of the ECM connector and the body ground when each control switch is operated.

Fig 1: ECM Terminal CCS Specifications Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Locating ECM Terminal CCS
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Proceed to next circuit inspection shown in problem symptoms table. See PROBLEM SYMPTOMS .
2. OK: Go to next step .
Check control switch continuity .
PREPARATION:
1. Remove the steering wheel center pad.
2. Disconnect the control switch connector.
CHECK:

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

Fig 3: Cruise Control Switch Position Specifications Chart Terminal 4 To 5
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Fig 4: Locating Cruise Control Switch Terminals 4 & 5
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, and cruise control switch and body ground.
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: Check and replace ECM .