Lexus ES300 (1997 year). Manual - part 638
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
146
DOOR LOCK CONTROL
CURRENT ALWAYS FLOWS TO TERMINAL 1 OF THE INTEGRATION RELAY THROUGH THE DOOR FUSE.
WHEN THE IGNITION SW IS TURNED ON, THE CURRENT FLOWING THROUGH THE GAUGE FUSE FLOWS TO TERMINAL 7 OF THE
INTEGRATION RELAY
→
TERMINAL 3
→
THE POWER RELAY (COIL SIDE)
→
GROUND. AS A RESULT, THE CURRENT FLOWING
THROUGH THE PWR FUSE FLOWS TO THE POWER RELAY (POINT SIDE)
→
TERMINAL 7 OF THE DOOR LOCK CONTROL SW LH
→
TERMINAL 1
→
GROUND, CAUSING THE INDICATOR LIGHT TO LIGHT UP.
1. MANUAL LOCK OPERATION
WHEN THE LOCK CONTROL SW OR DOOR KEY LOCK AND UNLOCK SW ARE PUSHED TO LOCK POSITION, A LOCK SIGNAL IS
INPUT TO TERMINAL 16 OR 18 OF THE INTEGRATION RELAY AND CAUSES THE RELAY TO FUNCTION. CURRENT FLOWS
FROM TERMINAL 1 OF THE RELAY
→
TERMINAL 12
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL 3 OF THE
DOOR LOCK MOTORS
→
TERMINAL 25 OF THE RELAY
→
TERMINAL 10
→
GROUND AND THE DOOR LOCK MOTOR CAUSES
THE DOOR TO LOCK.
2. MANUAL UNLOCK OPERATION
WHEN THE DOOR LOCK CONTROL SW OR DOOR KEY LOCK AND UNLOCK SW ARE PUSHED TO UNLOCK POSITION, AN UNLOCK
SIGNAL IS INPUT TO TERMINAL 17 OR 19 OR 20 OF THE INTEGRATION RELAY AND CAUSES THE RELAY TO FUNCTION.
CURRENT FLOWS FROM TERMINAL 1 OF THE RELAY
→
TERMINAL 25
→
TERMINAL 3 OF THE DOOR LOCK MOTORS
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL 12 OF THE RELAY
→
TERMINAL 10
→
GROUND AND THE DOOR LOCK
MOTOR CAUSES THE DOOR TO LOCK.
3. DOUBLE OPERATION UNLOCK OPERATION
WHEN THE DOOR KEY LOCK AND UNLOCK SW LH IS TURNED TO THE UNLOCK SIDE, ONLY THE DRIVER’S DOOR IS
MECHANICALLY UNLOCKED. TURNING THE DOOR KEY LOCK AND UNLOCK SW LH TO THE UNLOCK SIDE CAUSES A SIGNAL TO BE
INPUT TO TERMINAL 19 OF THE RELAY, AND IF THE SIGNAL IS INPUT AGAIN WITHIN 3 SECONDS BY TURNING THE SW TO THE
UNLOCK SIDE AGAIN, CURRENT FLOWS FROM TERMINAL 25 OF THE INTEGRATION RELAY
→
TERMINAL 3 OF THE DOOR LOCK
MOTORS
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL 12 OF THE RELAY
→
TERMINAL 10
→
GROUND, CAUSING
THE DOOR LOCK MOTORS TO OPERATE AND UNLOCK THE DOORS.
4. IGNITION KEY REMINDER OPERATION
*OPERATING DOOR LOCK KNOB (OPERATION OF DOOR LOCK MOTORS)
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
RELAY. AS A RESULT, THE CURRENT FLOWS FROM TERMINAL 1 OF THE INTEGRATION RELAY
→
TERMINAL 25
→
TERMINAL 3 OF THE DOOR LOCK MOTORS
→
TERMINAL 2 OF THE DOOR LOCK MOTOR
→
TERMINAL 12 OF THE RELAY
→
TERMINAL 10
→
GROUND AND CAUSES ALL THE DOORS TO UNLOCK.
* OPERATING THE DOOR LOCK CONTROL SW OR DOOR KEY LOCK AND UNLOCK 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 UNLOCKED BY THE FUNCTION OF SW
CONTAINED IN MOTORS, WHICH THE SIGNAL IS INPUT TO TERMINAL 5 (FRONT LH) OR 7 (FRONT RH) OR 9 (REAR LH,
RH) OF THE RELAY. ACCORDING TO THIS INPUT SIGNAL, THE CURRENT IN ECU FLOWS FROM TERMINAL 1 OF THE RELAY
→
TERMINAL 25
→
TERMINAL 3 OF THE DOOR LOCK MOTORS
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL
12 OF THE RELAY
→
TERMINAL 10
→
GROUND AND CAUSES ALL THE DOORS TO UNLOCK.
* IN CASE OF KEYLESS 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 4 OR 6 OR 6 OF THE INTEGRATION RELAY. BY
THIS INPUT SIGNAL, THE ECU WORKS AND CURRENT FLOWS FROM TERMINAL 1 OF THE RELAY
→
TERMINAL 25
→
TERMINAL 3 OF THE DOOR LOCK MOTORS
→
TERMINAL 2 OF THE DOOR LOCK MOTORS
→
TERMINAL 12 OF THE RELAY
→
TERMINAL 10
→
GROUND AND CAUSES ALL THE DOORS TO UNLOCK.
SYSTEM OUTLINE