1996 TOYOTA TERCEL Service Repair Manual

BE3843N14666N15243I09768
Disconnect
w/ Theft Deterrent System
 w/o Theft Deterrent System
B (-)
(+)
(-)
(+)
+B2
DI-202
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
1996 TERCEL (RM440U)
2 Check voltage between terminal +B2 (B) of ECU connector and body ground.
PREPARATION:
Disconnect the theft deterrent and door lock ECU connector.
CHECK:
Measure voltage between terminal +B2 (B) of ECU connector
and body ground.
OK:
Voltage: 10 - 14 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI-196).
NG
Check and repair harness and connectors
between ECU and battery
(See page DI-196).
*1: The power source is supplied to the actuator (door lock motor) through the theft deterrent and door lock
ECU. If a short circuit of the W/H or actuator occurs in the actuator circuit, the POWER M-fuse may become
OPEN, so also inspect the actuator (door lock motor circuit on page DI-203).

N12882
ID1
IH1
BJ1
BK1Theft Deterrent ECU
(Door Lock Control Relay)
( ): w/o Theft Deterrent System JUNCTION
CONNECTOR B R
GC
8 IE8 5 4
4 2T3 D63 (4)
T3 D62 (3) J6
JUNCTION
CONNECTOR
C
GG
G
G
GG
G
GC
CACT+
ACT-
B
BID2
IH1
BJ1
BK1 5 4
4 2 Door Lock Motor
Driver's
Rear Left Passenger's
Rear Right R
R
RR
R
R
R IE1
14
R 7
9
2
21
8
6
6
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-203
1996 TERCEL (RM440U)
Door Lock Motor Circuit
CIRCUIT DESCRIPTION
This door lock motor locks and unlocks the door in accordance with signals from the ECU.
WIRING DIAGRAM
DI4MT-02

BE5691
I05886
(-) (+)
(-) (+)
(-) (+) (-) (+) (a) (b)
(a) (b) Front Door
Rear Door54
4
2
54
42
DI-204
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
1996 TERCEL (RM440U)
INSPECTION PROCEDURE
1 Check operating sound of door lock motor.
CHECK:
Check operating sound of door lock motor, when door lock con-
trol switch is pushed to the lock side and unlock side.
OK:
Can hear operating sound of door lock motor.
HINT:
Inspect the door which is malfunctioning.
OK Repair or replace door lock control link.
NG
2 Check door lock motor.
PREPARATION:
(a) Remove the door trim and service hold cover.
(b) Disconnect the door lock motor connector.
CHECK:
(a) Connect positive
lead to terminal 5 (4) and negative 
lead to terminal 4 (2) of door lock motor connector.
(b) Connect positive
lead to terminal 4 (2) and negative 
lead to terminal 5 (4) of door lock motor connector.
( ): Rear Door
OK:
(1) Door lock motor locks door.
(2) Door lock motor unlocks door.
HINT:
This inspection must be carried out within 2 seconds.
OK Replace door lock motor.
NG

- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-205
1996 TERCEL (RM440U)
3 Check harness and connectors between ECU and door lock motor
(See page IN-26).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on
matrix chart (See page DI-196).

N15259
Theft Deterrent ECU
(Door Lock Control Relay)
Door Lock Control Switch
Driver's
(Door Lock Control Switch
Passenger's)
( ): w/o Theft Deterrent System IEJ6
JUNCTION
CONNECTORID110
W-B
A
IH13 ID11D9 (10)
T45
D9 (11)
T48L1
UL1 ID12
IH12 LOCK
UNLOCK
LOCK
UNLOCK AA W-B
W-B
W-B
W-B IH1 12
J3
JUNCTION
CONNECTOR A
A1 2
4
3
(3)
(2)R-Y
G-Y
R-Y
G-YR-Y
G-Y
R-Y
G-Y (4) DI-206
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
1996 TERCEL (RM440U)
Door Lock Control Switch Circuit
CIRCUIT DESCRIPTION
When the door lock control switch is pushed to the lock side, Lock terminal of the switch is grounded, and
when the switch is pushed to the unlock side, Unlock terminal is grounded (See wiring diagram below).
WIRING DIAGRAM
DI4MU-02

I05887
(-) (+)ON
3
2
RH LH
43
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-207
1996 TERCEL (RM440U)
INSPECTION PROCEDURE
1 Check voltage between terminals 2(3), 1(1) of door lock control switch connector
and body ground.
PREPARATION:
Remove the door trim and service hold cover.
CHECK:
(a) Turn ignition switch ON.
(b) Measure voltage between terminals 3(2), 4(3) of door lock
control switch connector and body ground, when door
lock control switch is pressed to the lock side, unlock side
and not pressed.
OK:
S it h itiTerminalSwitch position3(2)4(3)
Lock sideBelow 1 V8 - 10 V
Unlock side8 - 10 VBelow 1 V
OFF8 - 10 V8 - 10 V
HINT:
The terminal number without brackets is for the LH, the number
with brackets is for the RH.
OK Proceed to next circuit inspection shown on
matrix chart (See page DI-196).
NG

N15247
3
2 RH LH
43
214
DI-208
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
1996 TERCEL (RM440U)
2 Check door lock control switch.
PREPARATION:
Disconnect the door lock control switch connector.
CHECK:
Check continuity between terminals 4 (3), 3 (2), 1, 2 (4) of door
lock control switch connector, when door lock control switch is
pressed to the lock side, and unlock side and not pressed.
OK:
Switch positionTerminal
Lock side4 (3) - 1, 2 (4)
Unlock side3 (2) - 1, 2 (4)
OFF-
HINT:
The terminal number without brackets is for the LH, the number
with brackets is for the RH.
NG Replace door lock control switch.
OK
3 Check harness and connectors between ECU and door lock control switch,
switch and body ground (See page IN-26).
NG Repair or replace harness or connector.
OK
Check and replace ECU. *1
*1: Malfunction of the ECU can be considered possible only when the problem symptom is the following:

Lock and/or unlock using the Door Lock Control Switch cannot be done, neither on the driver's side
nor on the passenger's side.

N12884
Theft Deterrent ECU
Door Key Lock and Unlock Switch
Driver's
J6
JUNCTION
CONNECTORID110
W-B
AID1
D6 (10)
T4 22
LOCK
UNLOCK
AA W-B
W-B
J3
JUNCTION
CONNECTOR2R-Y9
IH111
IH110 ID18
IH1 12
A
ALOCK
UNLOCK Door Key Lock and Unlock Switch
Passenger's
(G-Y) R-W
G-W
R-WW-LW-L
(R-W) W-G
(R-Y)
D6(9)
T46
D6 (11)
T4 16L2
(L1)
UL3
UL2
(UL1) W-G 3
1
3
1 2
IE
( ): w/o Theft Deterrent System W-B
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-209
1996 TERCEL (RM440U)
Door Key Lock and Unlock Switch Circuit
CIRCUIT DESCRIPTION
The door key lock and unlock switch is built in the door key cylinder. When the key is turned to the lock side,
terminal 3 of the switch is grounded and when the key is turned to the unlock side, terminal 1 of the switch
is grounded.
WIRING DIAGRAM
DI4MV-02