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INSPECTION PROCEDURE 5: Selector "P" position-linked door unlock function does not operate <CVT>.
 
 
cautionBefore replacing the ECU, ensure that the input and output signal circuits are normal.
 
 
 
 
OPERATION
ETACS-ECU determines whether the shift position is at "P" or not according to the shift position signal which is sent by CVT-ECU.
 
 
CIRCUIT OPERATION
If the doors are not unlocked when the selector lever is shifted to the P position, a malfunction of the shift position signal input circuit(s) or ETACS-ECU is suspected. Also, the selector "P" position-linked door unlock function may have been "disabled" with the customization function.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of CAN bus line
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors
 
 
DIAGNOSIS
STEP 1. Checking central door unlocking operation
Check that the central door locking system works normally.
Is the check result normal?
Go to Step 2.
Refer to Central Door Locking System Symptom Chart .
 
STEP 2. Check the customization function.
Check that "Enable" is set for "Door unlock (Shift "P" position)" with the customization function.
Is the check result normal?
Go to Step 3.
Set "Enable" for "Door unlock (Shift "P" position)" with the customization function (Refer to Customization Function ).
 
STEP 3. Using scan tool (M.U.T-III), read the CAN bus diagnostic trouble code.
(1)
cautionTo prevent damage to scan tool (M.U.T-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T-III).
Connect scan tool (M.U.T-III). Refer to "How to connect scan tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Repair the CAN bus line (Refer to GROUP 54C, CAN bus diagnostics table ).
Go to Step 4.
 
STEP 4. Using scan tool (M.U.T-III), read the diagnostic trouble code.
(1)
cautionTo prevent damage to scan tool (M.U.T-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T-III).
Connect scan tool (M.U.T-III). Refer to "How to connect scan tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the transaxle control module related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Diagnose the transaxle control module. Refer to GROUP 23A, Diagnostic trouble code chart .
Go to Step 5.
 
STEP 5. Retest the system.
Check that shifting the selector lever to the P position unlocks the doors.
Is the check result normal?
No action is necessary and testing is complete.
Replace the ETACS-ECU. Check that the selector lever to the P position unlocks the doors normally.