Code No. P0705: Malfunction of Inhibitor Switch


















DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA



  • Does not detect the inhibitor switch input signal for 2 seconds.
  • CVT-ECU detects the multiple inputs from the inhibitor switch for 5 seconds.

PROBABLE CAUSES



  • Malfunction of the inhibitor switch
  • Improper adjustment of transmission control cable
  • Damaged wiring harness and connectors
  • Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list
Item 49: Inhibitor SW
Check that the service data changes when the selector lever is moved to all ranges.
OK: The service data changes in response to the selector lever operation.

Q. Is the check result normal?
Intermittent malfunction
Go to Step 2.

STEP 2. Check the following connector:

  • B-109 Inhibitor switch connector
  • C-33 CVT-ECU connector
Check the terminals for a contact status problem and internal short circuit.

Q. Is the check result normal?
Go to Step 3.
Repair the defective connector.

STEP 3. Check for open circuit in wiring harness between the ETACS-ECU connector and the inhibitor switch connector
Between the C-313 ETACS-ECU connector (terminal No. 4) and the B-109 inhibitor switch connector (terminal No. 3)
note Prior to the wiring harness inspection, check the intermediate connectors C-31 and A-11, and repair that if necessary.

Q. Is the check result normal?
Go to Step 4.
Repair the wiring harness.

STEP 4. Check for open circuit in the wiring harness between the inhibitor switch connector and the CVT-ECU connector

  • Between B-109 inhibitor switch connector (terminal No. 2) and C-33 CVT-ECU connector (terminal No. 32)
  • Between B-109 inhibitor switch connector (terminal No. 5) and C-33 CVT-ECU connector (terminal No. 45)
  • Between B-109 inhibitor switch connector (terminal No. 8) and C-33 CVT-ECU connector (terminal No. 34)
  • Between B-109 inhibitor switch connector (terminal No. 9) and C-33 CVT-ECU connector (terminal No. 33)

Q. Is the check result normal?
Go to Step 5.
Repair the wiring harness.

STEP 5. Inhibitor switch and control cable adjustment
Refer to .

Q. Is the check result normal?
Go to Step 6.
Adjust the inhibitor switch and control cable.

STEP 6. Inhibitor switch continuity check
Refer to .

Q. Is the check result normal?
Go to Step 7.
Replace the inhibitor switch.

STEP 7. Symptom recheck after erasing diagnosis code

Q. Is the check result normal?
Intermittent malfunction
Replace CVT-ECU.