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Inspection Procedure 4: Multimode keyless entry system function does not work at all. <Vehicles with electric retractable remote controlled door mirrors>
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
COMMENTS ON TROUBLE SYMPTOM
If the electric-folding door mirrors work normally, ETACS-ECU may be faulty. Also, the door mirror operation setting is configured for other than the folding/unfolding interlocked with the keyless entry operation, using the customization function.
 
 
PROBABLE CAUSES
  • Malfunction of keyless entry transmitter
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors
 
 
DIAGNOSIS
STEP 1. Confirm the transmitter.
Check that the keyless entry system works normally.
Is the check result normal?
Go to Step 2.
Refer to trouble symptom chart (Refer to ).
 
STEP 2. Check the operation of the electric-folding door mirror.
Check that the electric folding door mirrors work normally.
Is the check result normal?
Go to Step 3.
Refer to GROUP 51, Door mirror - Trouble Symptom Chart .
 
STEP 3. Using scan tool (M.U.T.-IIISE), read the DTC.
Check that keyless entry system sets a DTC.
Is the DTC set?
Refer to DTC chart (Refer to ).
Go to Step 4.
 
STEP 4. Check the customization function.
Use the customization function to check that the "Multi mode" has been set to one of the followings, not "Disabled."
  • D/M: O&C.
Is the check result normal?
Go to Step 5.
Use the customization function to set the "Multi mode" to one of the above, not "Disabled" (Refer to ).
 
STEP 5. Retest the system.
Check that the multimode keyless entry system works normally.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace ETACS-ECU and register the ID codes (Refer to ).