ECU TOYOTA TERCEL 1996 Service Manual PDF

DI4MR-02
N20816
BatteryEngine Room
Relay BlockInstrument Panel
Junction BlockTheft Deterrent ECU
+B1
T41
1D8
1K11
L-Y L-Y
2
MAIN FL
EA2BDOME 1
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-197
1996 TERCEL (RM440U)
CIRCUIT INSPECTION
ECU Power Source Circuit (w / Theft deterrent System)
CIRCUIT DESCRIPTION
This circuit provides power to operate the theft deterrent and door lock ECU.
WIRING DIAGRAM

N12865DOME Fuse

Engine Room Relay Block
I05884
(+)
(-)E +B1
OFF
DI-198
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
1996 TERCEL (RM440U)
INSPECTION PROCEDURE
1 Check DOME fuse.
PREPARATION:
Remove DOME fuse from engine room relay block.
CHECK:
Check continuity of DOME fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the DOME fuse
(See attached wiring diagram).
OK
2 Check voltage between terminals +B1 and E of ECU connector.
PREPARATION:
Disconnect the theft deterrent and door lock ECU connectors.
CHECK:
Measure voltage between terminals +B1 and E of ECU connec-
tor.
OK:
Voltage: 10 - 14 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI-196).
NG

- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-199
1996 TERCEL (RM440U)
3 Check for open in harness and connector between ECU and body ground
(See page IN-26).
NG Repair or replace harness or connector.
OK
Check and repair harness connector be-
tween ECU and battery.

N20817
BatteryInstrument Panel
Junction BlockTheft Deterrent ECU
(Door Lock Control Relay)
1J2
W-G
MAIN FLEA2
F7 F6 221A3
D6 (8)
T39
D6 (16)
T34
A A
IEJ3
JUNCTION
CONNECTOR A
AW-B
ALT AM1POWER
2 1L
W-B B W-G
( ): w/o Theft Deterrent System+B2
(B)
E
B-R B-R2JUNCTION
CONNECTOR J6
J/B No.2
11J/B No.7 DI-200
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
1996 TERCEL (RM440U)
Actuator Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to drive the door lock motor.
WIRING DIAGRAM
DI4MS-01

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

- 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

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