Doors do not lock or unlock with electronic key button operation

1. Doors do not lock or unlock with electronic key button operation diagnostics

Caution

  • The electronic key will not operate if the power mode is other than OFF.
  • Locking and unlocking using the electronic key is not possible when a door is open or ajar.
  • Locking or unlocking of the doors may not be possible if there is a facility nearby that is emitting strong radio waves.
  • If a malfunction is found in the circuit between the Wireless Access Module and the BCM, the CHECK SYSTEM is displayed on the MID.

1. Pre-check and visual inspection

Check the battery voltage.
Charge or replace the battery if battery voltage is low.

Check the fuses.
If an abnormal condition such as a blowout is found in fuses, repair the cause for blowout before replacing the fuses.

Check the ground point.
Repair and clean the ground point if improperly installed or significantly dirty.

Check the BCM.
Perform Diagnostic system check-body controls.
Observe the DTC with a scan tool, and go to the applicable DTC diagnosis if a DTC is set.

Check the harness and connectors.
Inspect for poor connections at the connectors, worn or bent harnesses, or for shorts to other circuits in the wires inside the harness.

Check for any interference from aftermarket electronic components such as wireless devices or lights.
Turn OFF or remove any aftermarket electronic components to ensure that there is no influence on inspections or operations.

2. Components inspection

Observe the Wireless Access Module (passive entry and start system) registration information with a scan tool.

Check the Wireless Access Module.
Observe the DTC with a scan tool, and diagnose the applicable DTC if a DTC is set.

Check the electronic key battery.
Replace the electronic key battery if it is deteriorated.

Check the electronic key.
Replace the electronic key if a malfunction is found.

3. Circuit inspection

Inspect the following circuits for an open circuit, short to the power supply, short to ground, or high resistance. If a malfunction is found in the circuit, repair or replace the applicable circuit.

  • Between the Wireless Access Module (pins 19 and 20 of B15) and the BCM (pins 4 and 3 of B18)
  • Wireless Access Module power supply circuit and ground circuit

Note

  • If the power mode can be turned from OFF to ON using the engine start/stop button, the electronic key and receiver are normal.
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