Lock/Unlock Cannot Be Operated With Keyless Entry

Trouble causes:

TPMS & keyless entry CONTROL MODULE or keyless entry CONTROL MODULE power supply circuit failure
TPMS & keyless entry CONTROL MODULE or keyless entry CONTROL MODULE failure
Keyless key failure

CAUTION:

Inspect LAN system according to the basic diagnostic procedure, and make sure that there is no fault.
Check that the TPMS & keyless entry function is not stopped.
Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to KEYLESS ENTRY(DIAGNOSTICS)>General Description>CAUTION .

CHECK DOOR LOCK SWITCH .
Check that the lock/unlock operates with the keyless transmitter.

Does it lock/unlock normally?

Yes: Go to 2.

No: Check the door lock circuit. Ref. to SECURITY AND LOCKS>Door Lock Control System>INSPECTION>SYMPTOM CHART .
CHECK FUSE .
Check the fuse. Ref. to SECURITY AND LOCKS>Relay and Fuse>INSPECTION .

Is the check result OK?

Yes: Go to 3.

No: Replace the fuse.
CHECK HARNESS (POWER SUPPLY CIRCUIT) .
1. Disconnect the TPMS & keyless entry CONTROL MODULE connector.
2. Using a tester, measure the voltage between the TPMS & keyless entry CONTROL MODULE connector and chassis ground.
  Connector & terminal
  
  (R221) No. 12 (+) - Chassis ground (-):
Is the voltage 9 - 16 V?

Yes: Go to 4.

No: Repair the power supply circuit.
CHECK HARNESS (OPEN CIRCUIT) .
1. Disconnect the body integrated unit connector.
2. Using a tester, measure the resistance between the TPMS & keyless entry CONTROL MODULE connector and body integrated unit.
  Connector & terminal
  
  (R221) No. 2 - (i171) No. 22:
  
  (R221) No. 1 - (i171) No. 2:
Is the resistance less than 1 Ω?

Yes: Go to 5.

No: Repair or replace the open circuit of harness.
CHECK HARNESS (GROUND SHORT CIRCUIT) .
Using a tester, measure the resistance between the TPMS & keyless entry CONTROL MODULE connector and chassis ground.

Connector & terminal

(R221) No. 2 - Chassis ground:

(R221) No. 1 - Chassis ground:

Is the resistance 10 kΩ or more?

Yes: Go to 6.

No: Repair or replace the short circuit of the harness.
CHECK KEYLESS TRANSMITTER .
Check the keyless transmitter battery. Ref. to SECURITY AND LOCKS>Keyless Transmitter>INSPECTION .

Is the battery OK?

Yes: Go to 7.

No: Replace the keyless transmitter battery. Ref. to SECURITY AND LOCKS>KEYLESS TRANSMITTER .
CHECK TPMS & KEYLESS ENTRY CONTROL MODULE .
1. Connect the TPMS & keyless entry CONTROL MODULE connector.
2. Turn the ignition switch to OFF and close all doors.
3. Perform lock operation with keyless key.
Does the door lock?

Yes: Currently, it is normal.

No: Replace the TPMS & keyless entry CONTROL MODULE. Ref. to WHEEL AND TIRE SYSTEM>TIRE PRESSURE MONITORING SYSTEM .