Toyota 2004 CELICA, Electric Troubleshooting Manual

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2004 CELICA (EWD538U)
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DOOR LOCK CONTROL
1. MANUAL UNLOCK OPERATION
When the door lock control SW on the center console is pressed to the UNLOCK, the signal is input to TERMINAL UL1 of
the body ECU. The current flows from TERMINAL ACT- of the body ECU into the door lock motor to TERMINAL ACT+ of
the body ECU to GROUND, to unlock the door.
2. MANUAL LOCK OPERATION
When the door lock control SW on the center console is pressed to LOCK, signal is input to TERMINAL L1 of the body ECU.
The current flows from TERMINAL ACT+ of the body ECU to door lock motor to TERMINAL ACT- of the body ECU to
GROUND, to lock the door.
3. DOOR KEY UNLOCK OPERATION
Unlock operation from driver door
When the door is unlocked once by the ignition key from the driver side, the signal from the door key lock and unlock SW in
the door lock motor front LH is input to TERMINAL UL3 of the body ECU. This signal activates the body ECU to flow the
current from TERMINAL ACT+ of the body ECU into the door lock motor front LH to TERMINAL ACT- of the body ECU to
GROUND, to unlock only the driver door. Accordingly, if the second unlock operation is made within 3 sec. after the above
unlock operation.
Unlock operation from passenger door
When the door is unlocked by the ignition key from the passenger side, the signal from the door key lock and unlock SW in
the door lock motor front RH is input to TERMINAL UL2 of the body ECU. The current flows from TERMINAL ACT- of the
body ECU into the door lock motor front RH to TERMINAL ACT+ of the body ECU to GROUND, to unlock all the doors at
once.
4. IGNITION KEY REMINDER OPERATION
When the door lock operation is made using the door knob with the ignition key remained inserted in the key cylinder and the
door open, unlock operation is automatically made. Additionally, if lock operation is made with the door lock control SW or
door key lock and unlock SW, unlock operation is automatically made after the lock operation has been completed.
D3, D4 DOOR COURTESY SW LH, RH
1-GROUND : Closed with door open
P5 DOOR LOCK CONTROL SW [POWER WINDOW MASTER SW]
5-17 : Closed with LOCK position
6-17 : Closed with UNLOCK position
D5 DOOR LOCK MOTOR, DOOR LOCK DETECTION SW AND DOOR KEY LOCK AND LOCK SW LH
2-GROUND : Approx. 12 volts with door lock motor at lock operate
1-GROUND : Approx. 12 volts with door lock motor at unlock operate
5-3 : Closed with door lock cylinder locked with key
6-3 : Closed with door lock cylinder unlocked with key
D6 DOOR LOCK MOTOR, DOOR LOCK DETECTION SW AND DOOR KEY LOCK AND LOCK SW RH
6-GROUND : Approx. 12 volts with door lock motor at lock operate
5-GROUND : Approx. 12 volts with door lock motor at unlock operate
2-4 : Closed with door lock cylinder locked with key
1-4 : Closed with door lock cylinder unlocked with key
: PARTS LOCATION
Code See Page Code See Page Code See Page
B6 A 36 D4 38 J3 37
B7 B 36 D5 38 J10 37
B10 38 D6 38 J11 38
C12 A 36 E2 A 32 (1ZZ-FE) P5 37
C13 B 36 E3 B 32 (1ZZ-FE) U1 37
D3 38 E8 E 34 (2ZZ-GE)
SYSTEM OUTLINE
SERVICE HINTS