Code No. P0830: Clutch Monitoring Switch Circuit


OPERATION



  • The power voltage is supplied to the clutch monitoring switch (terminal No. 2) from the AS&G-ECU (terminal No. 19).
  • The clutch monitoring switch (terminal No. 1) is earthed to the vehicle body.

FUNCTION



  • The AS&G-ECU detects the state of the depressed clutch pedal by using the signal of the clutch monitoring switch.
  • In response to the signal, the AS&G-ECU controls the AS&G system.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is "ON" position.
Judgement Criterion
  • Although the driving is more than 60 km/h during the previous driving, the ON/OFF signal of the clutch monitoring switch is not changed even once.

FAIL-SAFE AND BACKUP FUNCTION



  • In the normal operation, the auto stop is prohibited.

PROBABLE CAUSES



  • Open/short circuit or harness damage in clutch monitoring switch circuit or loose connector contact
  • Failed clutch monitoring switch
  • Failed installation of clutch monitoring switch
  • Failed clutch pedal
  • Failed AS&G-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

  • Refer to Data List Reference Table .

  1. item 6: Clutch monitoring switch (upper)

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.

STEP 2. Check the installation state of the clutch monitoring switch and check the clutch pedal.

  • Check the installation state of the clutch monitoring switch.
  • Check whether the installation portion of the clutch monitoring switch of the clutch pedal is not damaged.

Q. Is the check result normal?
Go to Step 3.
Repair or replace.

STEP 3. Connector check: C-229 clutch monitoring switch connector

Q. Is the check result normal?
Go to Step 4.
Repair or replace the connector.

STEP 4. Check the clutch monitoring switch itself.

  • Check the clutch monitoring switch itself (Refer to GROUP 21A - On-vehicle Service - Clutch Switch Check ).

Q. Is the check result normal?
Go to Step 5.
Replace the clutch monitoring switch.

STEP 5. Perform voltage measurement at C-229 clutch monitoring switch connector.

  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal No. 2 and earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 9.
Go to Step 6.

STEP 6. Connector check: C-11 AS&G-ECU connector

Q. Is the check result normal?
Go to Step 7.
Repair or replace the connector.

STEP 7. Check harness between C-11 (terminal No. 19) AS&G-ECU connector and C-229 (terminal No. 2) clutch monitoring switch connector.

  • Check power supply line for open/short circuit.

Q. Is the check result normal?
Go to Step 8.
Repair the damaged harness wire.

STEP 8. M.U.T.-III diagnosis code

  • Reconfirmation of the diagnosis code.

Q. Is the diagnosis code set?
Replace the AS&G-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 9. Perform resistance measurement at C-229 clutch monitoring switch connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 1 and earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 10.

    Check and repair harness between C-229 (terminal No. 1) clutch monitoring switch connector and body earth.

    • Check earthing line for open circuit and damage.

STEP 10. Connector check: C-11 AS&G-ECU connector

Q. Is the check result normal?
Go to Step 11.
Repair or replace the connector.

STEP 11. Check harness between C-11 (terminal No. 19) AS&G-ECU connector and C-229 (terminal No. 2) clutch monitoring switch connector.

  • Check power supply line for damage.

Q. Is the check result normal?
Go to Step 8.
Repair the damaged harness wire.