Inspection Procedure

CHECK:

Check that stop light comes on when brake pedal is depressed, and turns off when brake pedal is released.

1. NG : Check stop light system (See  PROBLEM SYMPTOMS TABLE  ). 
2. OK : Go To Next Step. 

CHECK:

1. See input signal check on PRE-CHECK .
2. Check the indicator light when the brake pedal is depressed.

OK:

1. The indicator light goes off when the brake pedal is depressed. 

Fig 1: Checking Indicator Light When Brake Pedal Is Depressed

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1. OK : Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
2. NG : Go To Next Step. 

PREPARATION:

1. Remove the ECU with connectors still connected.
2. Turn ignition switch ON.

CHECK:

Measure voltage between terminal STP of cruise control ECU connector and body ground, when the brake pedal is depressed and released.

Fig 2: Measuring Cruise Control Terminal Voltage

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OK:

1. OK : Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
2. NG : Go To Next Step. 

1. NG : Repair or replace harness or connector. 
2. OK : Check and replace cruise control ECU (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ).