Both Lock And Unlock Do Not Function With Keyless Entry System

Trouble causes:

Power supply circuit malfunction in TPMS & keyless entry control module or the keyless entry control module
Malfunction in TPMS & keyless entry control module or the keyless entry control module
Keyless transmitter malfunction

CAUTION:

Inspect LAN system according to the basic diagnostic procedure, and make sure that there is no fault.
Check that the TPMS & keyless entry control module or keyless entry control module is functioning.
Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to KEYLESS ENTRY (DIAGNOSTICS)>General Description>CAUTION .

CHECK DOOR LOCK SWITCH .
Check that lock/unlock operates by operating 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 or keyless entry control module connector.
2. Using a tester, measure the voltage between TPMS & keyless entry control module connector or TPMS control module connector and chassis ground.
  Connector & terminal
  
  Keyless entry control module
  
  (R80) No. 12 (+) - Chassis ground (-):
  
  TPMS & keyless entry control module
  
  (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 TPMS & keyless entry control module connector or keyless entry control module connector and body integrated unit.
  Connector & terminal
  
  Keyless entry control module
  
  (R80) No. 2 - (i171) No. 1:
  
  (R80) No. 1 - (i171) No. 2:
  
  TPMS & keyless entry control module
  
  (R221) No. 2 - (i171) No. 1:
  
  (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 TPMS & keyless entry control module connector or keyless entry control module connector and chassis ground.

Connector & terminal

Keyless entry control module

(R80) No. 2 - Chassis ground:

(R80) No. 1 - Chassis ground:

TPMS & keyless entry control module

(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 OR KEYLESS ENTRY CONTROL MODULE .
1. Connect the TPMS & keyless entry control module connector or keyless entry control module connector.
2. Turn the ignition switch to OFF and close all doors.
3. Perform the lock operation using the keyless transmitter.
Does the door lock?

Yes : Currently, it is normal.

No : Replace the TPMS & keyless entry control module or keyless entry control module. Ref. to WHEEL AND TIRE SYSTEM>TIRE PRESSURE MONITORING SYSTEM . Ref. to SECURITY AND LOCKS>KEYLESS ENTRY CONTROL MODULE .