Keyless Access System Symptom Troubleshooting - The key-in reminder sounds in vehicle OFF mode when door is open
NOTE: Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connector.
- 1. DTC check:
- 1. Check for PCU DTCs with the HDS.
DTC (PCU)
Are there any DTCs?
YES
Go to the indicated DTC troubleshooting.
NO
Go to step 2.
- 2. Shorted wire check (KEY SW line):
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
Keyless access control unit connector C (24P) Under-dash fuse/relay box connector P (20P)
- 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Keyless access control unit connector C (24P): disconnected
Under-dash fuse/relay box connector P (20P): disconnected
Test point 1 Keyless access control unit connector C (24P) No. 6 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
The KEY SW wire is not shorted. Go to step 3.
- 3. Open wire check (KEY SW line):
- 1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Keyless access control unit connector C (24P): disconnected
Under-dash fuse/relay box connector P (20P): disconnected
Test point 1 Under-dash fuse/relay box connector P (20P) No. 11 Test point 2 Keyless access control unit connector C (24P) No. 6 Is there continuity?
YES
The KEY SW wire is OK. Go to step 4.
NO
Repair an open or high resistance in the wire.
- 4. Determine possible failure area (under-dash fuse/relay box, others):
- 1. Reconnect under-dash fuse/relay box connector P (20P).
- 2. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Keyless access control unit connector C (24P): disconnected
Test point 1 Under-dash fuse/relay box connector P (20P) No. 11 Test point 2 Body ground Is there battery voltage?
YES
Go to step 5.
NO
Faulty MICU; replace the under-dash fuse/relay box .
- 5. Power control unit KEY SW line check:
- 1. Reconnect keyless access control unit connector C (24P).
- 2. Turn the vehicle to the ON mode.
- 3. Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter FUNCTIONAL TESTS.
ONE-PUSH START - KEYLESS ACCESS CONTROL Unit - Functional Tests
- 4. Connect the voltmeter to test points 1 and 2.
Test point 1 Keyless access control unit connector C (24P) No. 6 Test point 2 Body ground - 5. Select DRLOCKSWOUT with the HDS.
Does the voltage change from about 12 to 0 V?
YES
Go to step 6.
NO
- 6. Keyless access control unit SS1 (+) line check:
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
Keyless access control unit connector C (24P) - 3. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Keyless access control unit connector C (24P): disconnected
Test point 1 Keyless access control unit connector C (24P) No. 6 Test point 2 Body ground Is there about 0 V?
YES
Reconnect the connectors and recheck the system. If the symptom does not go away, replace the keyless access control unit .
NO
Go to step 7.
- 7. Open wire check (SS1 (+) line):
- 1. Disconnect the following connector.
Engine start/stop switch 10P connector - 2. Do the engine start/stop switch test .
Is the engine start/stop switch OK?
YES
Repair an open or high resistance in the wire.
NO