Inspection Procedure 3

Clutch Pedal Position Switch Circuit:

Connector:

CIRCUIT OPERATION
This circuit indicates the operation status of the clutch pedal position switch. When the clutch pedal position switch is ON (clutch pedal is depressed), the voltage of auto-cruise control-ECU terminal number 13 will indicate 0 volt.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a malfunction of the clutch pedal position switch circuit.

TROUBLESHOOTING HINTS
- Malfunction of the clutch pedal position switch.
- Damaged harness or connector.
- Malfunction of the auto-cruise control-ECU.

DIAGNOSIS




STEP 1. Check the clutch pedal position switch.
1. Disconnect clutch pedal position switch connector C-01.




2. Measure the continuity between the terminals.

Q: Is the continuity meet the table above?

YES: Go to Step 2.

NO: Replace the clutch pedal position switch.
Refer to Transmission.
Then check that the malfunction is eliminated.




STEP 2. Check the output circuit voltage at auto-cruise control-ECU connector C-20 by backprobing.
1. Do not disconnect auto-cruise control switch connector C-20.
2. Turn the ignition switch to "ON" position.
3. Measure the voltage between terminal 13 and ground by backprobing.
- Voltage should be 0.5 volts or less. (When clutch pedal is depressed.)
- Voltage should be battery positive voltage. (When clutch pedal is not depressed.)

Q: Is the voltage within specifications?

YES: Check that the malfunction is eliminated.
If the malfunction is eliminated, replace the auto-cruise control-ECU.
Then check that the malfunction is eliminated.

NO: Go to Step 3.










STEP 3. Check clutch pedal position switch connector C-01 and auto-cruise control-ECU connector C-20 and intermediate connector C-89.

Q: Is any connector damaged?

YES: Repair or replace connector.
Refer to Harness Connector Inspection.
Then check that the malfunction is eliminated.

NO: Go to Step 4.







STEP 4. Check the harness wire between clutch pedal position switch connector C-01 and auto-cruise control-ECU connector C-20.

Q: Is any harness wire between clutch pedal position switch connector C-01 and auto-cruise control-ECU connector C-20 damaged?

YES: Repair the harness wire and then check that the malfunction is eliminated.

NO: Go to Step 5.




STEP 5. Check the harness wire between clutch pedal position switch connector C-01 and ground wire.

Q: Is any harness wire between clutch pedal position switch connector C-01 and ground wire damaged?

YES: Repair the harness wire and then check that the malfunction is eliminated.

NO: Check that the malfunction is eliminated.
If the malfunction is eliminated, replace the auto-cruise control-ECU.
Then check that the malfunction is eliminated.