Keyless Access System Touch Sensor Circuit Troubleshooting
Touch Sensor Circuit Troubleshooting
1.
Keyless access system check 1:

Keyless access system check 1
?1.
Connect the HDS to the data link connector (DLC).

?2.
Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter HISTORY DATA.

  

?3.
Select HISTORY CLEAR, and back to TEST MODE menu:
NOTE: When the freeze data is cleared, the information indicates "NOT CONFIRMED".
DRIVER DOOR UNLOCK SWITCH
DRIVER DOOR LOCK SWITCH
FRONT PASSENGER DOOR UNLOCK SWITCH
FRONT PASSENGER DOOR LOCK SWITCH

?4.
Press the engine start/stop button to select the OFF mode.

?5.
Get out of the vehicle with the keyless remote, and touch the driver's or front passenger's door outer handle touch sensor and push the lock button.

?6.
Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter HISTORY DATA.

  

?7.
Recheck HISTORY DATA.
DRIVER DOOR UNLOCK SWITCH
DRIVER DOOR LOCK SWITCH
FRONT PASSENGER DOOR UNLOCK SWITCH
FRONT PASSENGER DOOR LOCK SWITCH

Is all the information OK?

     
YES
     
     
     
The system is OK at this time.?
     
NO
     
     
     
Go to step 2.
2.
Open wire check (GND line):

Open wire check (GND line)
?1.
Disconnect the following connectors.

?2.
Check for continuity between test points 1 and 2 individually.
Driver's door
Test condition
OFF mode
Driver's door outer handle 8P connector: disconnected
Test circuit
GND
Test point 1
Driver's door outer handle 8P connector No. 8 (BLK)
Test point 2
Body ground

Front passenger's door
Test condition
OFF mode
Front passenger's door outer handle 8P connector: disconnected
Test circuit
GND
Test point 1
Front passenger's door outer handle 8P connector No. 8 (BLK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Go to step 3.
     
NO
     
     
     
Repair an open or high resistance in the ground wire or poor ground (G501, G503).?
3.
Determine possible failure area (TS FR line, VOUT FR lines):

Determine possible failure area (TS FR line, VOUT FR lines)
?1.
Measure the voltage between test points 1 and 2 individually.
Driver's door
Test condition
OFF mode
Driver's door outer handle 8P connector: disconnected
Test circuit
VOUT FR DR
Test point 1
Driver's door outer handle 8P connector No. 4 (RED)
Test point 2
Body ground

Front passenger's door
Test condition
OFF mode
Front passenger's door outer handle 8P connector: disconnected
Test circuit
VOUT FR AS
Test point 1
Front passenger's door outer handle 8P connector No. 4 (LT BLU)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Go to step 7.
4.
Open wire check (TS FR DR, TS FR AS lines):

Open wire check (TS FR DR, TS FR AS lines)
?1.
Disconnect the following connector.

?2.
Connect terminals A and B with jumper wires.
Driver's door
Terminal A
Driver's door outer handle 8P connector No. 3 (GRY)
Terminal B
Body ground

Front passenger's door
Terminal A
Front passenger's door outer handle 8P connector No. 3 (BRN)
Terminal B
Body ground


?3.
Check for continuity between test points 1 and 2 individually.
Test condition
OFF mode
Driver's door outer handle 8P connector: disconnected
Driver's door outer handle 8P connector: jumped to body ground
Front passenger's door outer handle 8P connector: disconnected
Front passenger's door outer handle 8P connector: jumped to body ground
Keyless access control unit connector A (32P): disconnected
Test circuit
TS FR DR
Test point 1
Keyless access control unit connector A (32P) No. 14 (GRY)
Test point 2
Body ground

Test circuit
TS FR AS
Test point 1
Keyless access control unit connector A (32P) No. 7 (BRN)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The TS FR DR and TS FR AS wires are not open. Go to step 5.
     
NO
     
     
     
Repair an open or high resistance in the wire(s).?
5.
Shorted wire check (TS FR DR, TS FR AS lines):

Shorted wire check (TS FR DR, TS FR AS lines)
?1.
Remove the jumper wire from the touch sensor.

?2.
Check for continuity between test points 1 and 2 individually.
Test condition
OFF mode
Driver's door outer handle 8P connector: disconnected
Front passenger's door outer handle 8P connector: disconnected
Keyless access control unit connector A (32P): disconnected
Test circuit
TS FR DR
Test point 1
Keyless access control unit connector A (32P) No. 14 (GRY)
Test point 2
Body ground

Test circuit
TS FR AS
Test point 1
Keyless access control unit connector A (32P) No. 7 (BRN)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire(s).?
     
NO
     
     
     
The TS FR DR and TS FR AS wires are OK. Go to step 6.
6.
Keyless access system check 2:

Keyless access system check 2
?1.
Substitute a known-good touch sensor, and recheck.

Is the system OK?

     
YES
     
     
     
Faulty the original door touch sensor/lock switch; replace the door outer handle.?
     
NO
     
     
     
7.
Open wire check (VOUT FR DR, VOUT FR AS lines):

Open wire check (VOUT FR DR, VOUT FR AS lines)
?1.
Measure the voltage between test points 1 and 2 individually.
Test condition
OFF mode
Driver's door outer handle 8P connector: disconnected
Front passenger's door outer handle 8P connector: disconnected
Test circuit
VOUT FR DR
Test point 1
Keyless access control unit connector A (32P) No. 12 (RED)
Test point 2
Body ground

Test circuit
VOUT FR AS
Test point 1
Keyless access control unit connector A (32P) No. 21 (LT BLU)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Repair an open or high resistance in the wire(s).?
     
NO
     
     
     
The VOUT FR DR and VOUT FR AS wires are OK. Replace the keyless access control unit.?