Inspection Procedure

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Input signal check. See Fig 2.
1. See step 6 - INPUT SIGNAL CHECK under TROUBLESHOOTING.
2. Check the indicator light operation when each of the SET/COAST, RESUME/ACCEL and CANCEL is turned ON.
  OK:
  
  SET/COAST, RESUME/ACCEL switch:
  
  The signals shown in the table should be output when each switch is ON. The signal should disappear when the switch is turned OFF. See Fig 2.
  
  CANCEL switch:
  
  The indicator light goes off when the cancel switch is turned ON.
OK , wait and see.

NG , go to step 2.

Inspect terminal voltage (CCS).

Remove the cruise control ECU assy with the connector being connected.
Turn the ignition switch to ON.
Measure the voltage between terminals 11 (CCS) of the cruise control ECU assy connector and the body ground when each control switch is operated. See Fig 3.
OK : See CCS Terminal Voltages table.

CCS TERMINAL VOLTAGES

Switch Position	Voltage
Neutral	10-16 V
CRUISE ON-OFF	Below 0.5 V
RES/ACC	2.3-4.5 V
SET/COAST	4.5-8.1 V
CANCEL	6.6-11.4 V

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

OK , go to step 3.

Inspect cruise control main switch assy.

Remove the steering wheel center pad .
Disconnect the control switch assy connector.

Check continuity between terminals 2 (CCS) and 3 (ECC) of control switch assy connector when cruise control main switch assy is held ON and OFF. See Fig 4.

OK : See CRUISE CONTROL MAIN SWITCH CONTINUITY .

CRUISE CONTROL MAIN SWITCH CONTINUITY

Switch Position	Resistance
Neutral	Infinite (No continuity)
Cruise ON-OFF	0 Ω Continuity
Res/acc	210 - 270 Ω
Set/coast	560 - 700 Ω
Cancel	1,380 -1,700 Ω

NG , replace cruise control main switch assy.

OK , go to step 4.

Check harness and connector (between cruise control main switch assy and body ground).
1. Check for open and short circuit in harness and connector between cruise control main switch assy and body ground. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS in INTRODUCTION.
  NG , repair or replace harness or connector.
  
  OK , go to step 5.
Check harness and connector (between cruise control ECU assy and cruise control main switch),
1. Check for open and short circuit in harness and connector between cruise control ECU assy and cruise control main switch assy. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS in INTRODUCTION.
NG , repair or replace harness or connector.

OK , go to step 6.
Input signal check. See step 6 - INPUT SIGNAL CHECK under TROUBLESHOOTING.
OK , wait and see.

NG , check and replace cruise control ECU assy. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS in INTRODUCTION.

Fig 1: Cruise Control Switch Circuit Wiring Diagram

Fig 2: Identifying Cruise Control Switch Circuit Input Signal

Fig 3: Locating Cruise Control ECU Connector Terminal 11

Fig 4: Testing Terminals 2 (CCS) and 3 (ECC)