Toyota ST185 Series Repair Manual page 94

DOOR LOCK
SYSTEM OUTLINE
CURRENT ALWAYS FLOWS TO TERMINAL 8 OF THE DOOR LOCK ECU AND TERMINAL 4 OF THE POWER MAIN RELAY THROUGH
POWER FUSE.
1. MANUAL LOCK OPERATION
TO CHANGE DOOR LOCK SW AND KEY SW TO LOCK POSITION, A LOCK SIGNAL IS INPUT TO TERMINAL 10, 12 OF THE DOOR LOCK
ECU AND CAUSES THE RELAY TO FUNCTION. CURRENT FLOWS FROM TERMINAL 8 OF THE ECU
THE DOOR LOCK MOTOR
CAUSES THE DOOR TO LOCK.
2. MANUAL UNLOCK OPERATION
TO CAHNGE DOOR LOCK CONTROL SW AND KEY SW RH TO UNLOCK POSITION, AN UNLOCK SIGNAL IS INPUT TO TERMINAL 11 OF
THE DOOR LOCK ECU AND CAUSES THE RELAY TO FUNCTION. CURRENT FLOWS FROM TERMINAL 8 OF THE ECU
TERMINAL 5 OF THE DOOR LOCK MOTOR
DOOR LOCK SOLENOID CAUSES DOOR TO UNLOCK.
3. DOUBLE OPERATION UNLOCK OPERATION
WHEN THE DOOR LOCK KEY SW (DRIVER'S) IS TURNED TO THE UNLOCK SIDE, ONLY THE DRIVER'S DOOR IS MECHANICALLY
UNLOCKED. TURNING THE DOOR LOCK KEY SW (DRIVER'S) TO THE UNLOCK SIDE CAUSES A SIGNAL TO BE INPUT TO TERMINAL 9
OF THE ECU, AND IF THE SIGNAL IS INPUT AGAIN WITHIN 3 SECONDS BY TURNING THE SWITCH TO THE UNLOCK SIDE AGAIN,
CURRENT FLOWS TERMINAL 3
GROUND, CAUSING THE DOOR LOCK MOTOR TO OPERATE AND UNLOCK THE PASSENGER'S DOOR.
4. IGNITION KEY REMINDER OPERATION
* OPERATING DOOR LOCK KNOB (IN DOOR LOCK SOLENOIDS OPERATION)
WITH IGNITION KEY IN CYLINDER (UNLOCK WARNING SW ON), WHEN THE DOOR IS OPENED AND LOCKED USING DOOR LOCK
KNOB (DOOR LOCK MOTOR), THE DOOR IS LOCKED ONCE BUT EACH DOOR IS UNLOCKED SOON BY THE FUNCTION OF ECU. AS
A RESULT, THE CURRENT FLOWS FROM TERMINAL 8 OF THE ECU
TERMINAL 7 TERMINAL 4 OF THE ECU
* OPERATING DOOR LOCK CONTROL SW OR DOOR LOCK KEY SW
WITH IGNITION KEY IN CYLINDER (UNLOCK WARNING SW ON), WHEN THE DOOR IS OPENED AND LOCKED USING DOOR LOCK
CONTROL SW OR KEY SW, THE DOOR IS LOCKED ONCE BUT EACH DOOR IS UNLOCK BY THE FUNCTION OF SW CONTAINED IN
SOLENOIDS, WHICH THE SIGNAL IS INPUT TO TERMINAL 6 (DRIVER'S) OR 5 (PASSENGER'S) OF THE ECU. ACCORDING TO THIS
INPUT SIGNAL, THE CURRENT IN ECU FLOWS FROM TERMINAL 8 OF THE ECU
LOCK MOTOR TERMINAL 7
UNLOCK.
* IN CASE OF KEY LESS LOCK
WITH IGNITION KEY IN CYLINDER (UNLOCK WARNING SW ON), WHEN THE UNLOCK FUNCTION IS DISTURBED MORE THAN 0.2
SECONDS, FOR EXAMPLE PUSHING THE DOOR LOCK KNOB ETC., THE DOOR HOLDS ON LOCK CONDITION. CLOSING THE DOOR
AFTER, DOOR COURTESY SW INPUTS THE SIGNAL INTO TERMINAL 2 OR 14 OF THE ECU. BY THIS INPUT SIGNAL, THE RELAY
WORKS AND CURRENT FLOWS FROM TERMINAL 8 OF THE ECU
TERMINAL 7 TERMINAL 4 OF THE ECU
SERVICE HINTS
D 5 DOOR LOCK ECU
16–GROUND : ALWAYS CONTINUITY
2–GROUND : CONTINUITY WITH DRIVER'S DOOR OPEN
8–GROUND : ALWAYS APPROX. 12 VOLTS
3–GROUND : APPROX. 12 VOLTS 0.2 SECONDS WITH FOLLOWING OPERATION
*DOOR LOCK CONTROL SW UNLOCKED
*DOOR LOCK CONTROL SW LOCKED WITH IGNITION KEY IN CYLINDER AND DRIVER'S DOOR OPEN
(IGNITION KEY REMINDER FUNCTION)
*DOOR LOCK KNOB LOCKED WITH IGNITION KEY IN CYLINDER AND DRIVER'S DOOR OPEN
(IGNITION KEY REMINDER FUNCTION)
*UNLOCKING THE DRIVER'S, PASSENGER'S DOOR CYLINDER WITH KEY
4–GROUND : APPROX. 12 VOLTS 0.2 SECONDS WITH FOLLOWING OPERATION
*DOOR LOCK CONTROL SW LOCKED
*LOCKING THE DRIVER'S, PASSENGER'S DOOR CYLINDER WITH KEY
10–GROUND : 0 VOLTS WITH DOOR LOCK CONTROL SW LOCKED
14–GROUND : CONTINUITY WITH PASSENGER'S DOOR OPEN
6–GROUND : CONTINUITY WITH DRIVER'S DOOR LOCK KNOB UNLOCKED
5–GROUND : CONTINUITY WITH PASSENGER'S DOOR LOCK KNOB UNLOCKED
11–GROUND : 0 VOLTS WITH DOOR LOCK CONTROL SW UNLOCKED, PASSENGER'S DOOR LOCK CYLINDER UNLOCKED WITH KEY
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TERMINAL 5 TERMINAL 3 OF THE ECU
TERMINAL 7
TERMINAL 5 OF DOOR LOCK MOTOR
TERMINAL 16
TERMINAL 4 OF THE ECU
TERMINAL 16
TERMINAL 16 TO GROUND AND DOOR LOCK SOLENOID
TERMINAL 4 OF THE ECU
TERMINAL 7 TERMINAL 4 OF THE ECU
TERMINAL 3 TERMINAL 5 OF THE DOOR LOCK MOTOR
TO GROUND AND CAUSES ALL THE DOORS TO UNLOCK.
TERMINAL 3
TERMINAL 16 TO GROUND AND CAUSES ALL THE DOOR TO
TERMINAL 3 TERMINAL 5 OF THE DOOR LOCK MOTOR
TO GROUND AND CAUSES ALL THE DOORS TO UNLOCK.
TERMINAL 4 TERMINAL 7 OF
TERMINAL 3
TERMINAL 16 TO GROUND AND
TERMINAL 16
TERMINAL 5 OF THE DOOR