Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

Check operation (stop lamp switch assy).
1. Check that the stop light comes on when the brake pedal is depressed, and turns off when the brake pedal is released.
NO Inspect stop lamp circuit.

YES , go to step 2.
Input signal check. See Fig 1.
1. See 6 - INPUT SIGNAL CHECK.
2. Check the indicator light when the brake pedal is depressed.
  OK: the indicator light goes off when the brake pedal is depressed.
OK proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE under PROBLEM SYMPTOMS TABLE.

NG , go to step 3.

Inspect terminal voltage (STP-).

Remove the cruise control ECU assy with connectors still connected.
Turn the ignition switch to ON.

Measure voltage between terminal 3 (STP-) of cruise control ECU assy connector and body ground, when the brake pedal is depressed and released. See Fig 2 and STP TERMINAL 3 VOLTAGES .

OK:

STP TERMINAL 3 VOLTAGES

Brake Pedal	Voltage
Depressed	10-16V
Released	Below 1.0 V

NG , Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE under PROBLEM SYMPTOMS TABLE.

OK , go to step 4.

Check harness and connector (between cruise control ECU assy and stop lamp switch assy).
1. Check for open and short circuit in harness and connector between cruise control ECU assy and stop lamp switch assy. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS in INTRODUCTION.
NG , Repair or replace harness or connector.

OK CHECK AND REPLACE CRUISE CONTROL ECU ASSY. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS in INTRODUCTION.

Fig 1: Input Signal Chart (Stop Light Switch)

Fig 2: Measuring Cruise Control ECU STP Terminal 3 Voltages