1996 TOYOTA TERCEL ECM

DI-104
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
NG
2 Check for ECM power source circuit (See page DI-97).
NG Repair or replace.
OK
3 Check circuit opening relay (See page MF-40).
NG Replace circuit opening relay.
OK
4 Check voltage between terminal FC of ECM connector and body ground.
(See page DI-100)
NG Check for open in harness and connector be-
tween EFI main relay and circuit opening relay,
circuit opening relay and ECM.
OK
5 Check fuel pump (See page MF-1).
NG Repair or replace fuel pump.
OK
6 Check for open in harness and connector between circuit opening relay and fuel
pump, fuel pump and body ground (See page IN-26).

- DIAGNOSTICSENGINE
DI-105
1996 TERCEL (RM440U)
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-26).

A15741
START
ACT (+)
- DIAGNOSTICSENGINE
DI-107
1996 TERCEL (RM440U)
NG
2 Check for open and short in harness and connector between ECM and A/C am-
plifier (See page IN-26).
NG Repair or replace harness or connector.
OK
3 Check voltage between terminal ACT of ECM and body ground.
PREPARATION:
(a) Remove the lower finish panel.
(b) Start the engine.
CHECK:
Measure the voltage between terminal ACT of the ECM con-
nector and the body ground when A/C switch is turned to ON
and OFF.
OK:
A/C switch conditionVoltage
ON9 - 14 V
OFFBelow 2.0 V
NG Check and replace A/C amplifier.
OK
Check and replace ECM (See page IN-26).
OBD II scan tool (excluding TOYOTA hand-held tester):
1 Check voltage between terminal ACT of ECM connector and body ground (See
page DI-106, step 3).
OK Check and repair ECM (See page IN-26).
NG

DI-108
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
2 Check for open and short in harness and connector between ECM and A/C am-
plifier (See page IN-26).
NG Repair or replace harness or connector.
OK
Check and replace A/C amplifier.

DI95O-01
H09395h-10-2-D
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-153
1996 TERCEL (RM440U)
TERMINALS OF ECM
No.SymbolTerminal Name
A-Electrical Connection Check Mechanism
B-Electrical Connection Check Mechanism
1P-Squib  (Passenger)
2P+Squib
(Passenger)
3D-Squib  (Driver)
4D+Squib
(Driver)
5E1Ground
6E2Ground
7TcDiagnosis
8LASRS Warning Light
9IG2Power Source (IGN Fuse)
10ACCPower Source (CIG Fuse)

DI4MP-02
I00302 I00303I00304Theft Deterrent and Door Lock Control ECU AB T3
T4
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
DI-193
1996 TERCEL (RM440U)
TERMINALS OF ECM
w/ Theft Deterrent System
TerminalsSymbolsConditionSTD Value
A2 e A3ACT- - ACT+Ignition switch ºOFFº.Below 50 W
A4 e GroundE - GroundAlways.Below 1 W
A4 e A8E - ACCIgnition switch ºACCº.10 - 14 V
A9 e Ground+ B2 - GroundAlways.10 - 14 V
B1 e Ground+ B1 - GroundAlways.10 - 14 V
B2A4LSWR E
Door unlock detection switch ºONº.
(Rear door)Below 1 W
B2 e A4LSWR - EDoor unlock detection switch ºOFFº.
(Rear door)1 MW or higher
B3A4CTY E
Door courtesy switch ºONº.
(Except driver's door opened)Below 1 W
B3 e A4CTY - EDoor courtesy switch ºOFFº.
(Except driver's door closed)1 MW or higher
B4A4DSWL ELuggage compartment door courtesy switch ºONº.Below 1 WB4 e A4DSWL - ELuggage compartment door courtesy switch ºOFFº.1 MW or higher
B5A4L1 EDoor lock control switch ºLOCKº .Below 1 WB5 e A4L1 - EDoor lock control switch ºOFFº or ºUNLOCKº .1 MW or higher
B6A4UL3 E
Driver's door key lock and unlock switch
ºUNLOCKº.Below 1 W
B6 e A4UL3 - EDriver's door key lock and unlock switch
ºOFFº or ºLOCKº.1 MW or higher
B7A4DSWD E
Door courtesy switch ºONº.
(Driver's door opened)Below 1 W
B7 e A4DSWD - EDoor courtesy switch ºOFFº.
(Driver's door closed)1 MW or higher
B8A4UL1 EDoor lock control switch ºUNLOCKº .Below 1 WB8 e A4UL1 - EDoor lock control switch ºOFFº or ºLOCKº.1 MW or higher
B9A4LUG E
Luggage compartment door key lock
and unlock switch ºONº.Below 1 W
B9 e A4LUG - ELuggage compartment door key lock
and unlock switch ºOFFº.1 MW or higher
B10 e A4HEAD - ELight control switch other than ºHEADº.10 - 14 V
B11 e A4SH - EAlways.10 - 14 V
B12 e B1IND - +B1Indicator light ºONº.Below 1 W

DI4N2-02
I00302 I00303I00304
T4 T3
Theft Deterrent and Dor Lock Control ECU A
B
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-221
1996 TERCEL (RM440U)
TERMINALS OF ECM
TerminalsSymbolsConditionSTD Value
A2 - A3ACT- eACT+Ignition switch ºOFFº.Below 50 W
A4 - GroundE e GroundAlways.Below 1 W
A4 - A8E e ACCIgnition switch ºACCº.10 - 14 V
A9 - Ground+B2 e GroundAlways.10 - 14 V
B1 - Ground+B1 e GroundAlways.10 - 14 V
B2A4LSWRE
Door unlock detection switch ºONº.
(Rear door)Below 1 W
B2 e A4LSWR e EDoor unlock detection switch ºOFFº.
(Rear door)1 MW or higher
B3A4CTYE
Door courtesy switch ºONº.
(Except driver's door opened)Below 1 W
B3 eA4CTY e EDoor courtesy switch ºOFFº.
(Except driver's door closed)1 MW or higher
B4A4DSWLELuggage compartment door courtesy switch ºONº.Below 1 WB4 e A4DSWL e ELuggage compartment door courtesy switch ºOFFº.1 MW or higher
B5A4L1EDoor lock control switch ºLOCKº.Below 1 WB5 e A4L1 e EDoor lock control switch ºOFFº or ºUNLOCKº.1 MW or higher
B6A4UL3E
Door key lock and unlock switch
driver's door ºUNLOCKº.Below 1 W
B6 e A4UL3 e EDoor key lock and unlock switch
driver's door ºOFFº or ºLOCKº.1 MW or higher
B7A4DSWDE
Door courtesy switch ºONº.
(Driver's door opened)Below 1 W
B7 eA4DSWD e EDoor courtesy switch ºOFFº.
(Driver's door closed)1 MW or higher
B8A4UL1EDoor lock control switch ºUNLOCKº.Below 1 WB8 e A4UL1 e EDoor lock control switch ºOFFº or ºLOCKº.1 MW or higher
B9A4LUGELuggage compartment door key lock and unlock switch ºONº.Below 1 WB9 e A4LUG eELuggage compartment door key lock and unlock switch ºOFFº.1 MW or higher
B10 - A4HEAD e ELight control switch other than ºHEADº.10 - 14 V
B11 - A4SH e EAlways.10 - 14 V
B12 - A4IND e EIndicator light circuit.Below 1 W
B14A4DSWHEEngine hood courtesy switch ºONº.Below 1 WB14 e A4DSWH e EEngine hood courtesy switch ºOFFº.1 MW or higher

FI2553
SST
FI4429
Plug MF-2
- MFIMFI SYSTEM
526 Author
: Date
:
1996 TERCEL (RM440U)
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (-) cables.
(c) Do not permit parts to receive a severe impact during re-
moval or installation. Handle all MFI parts carefully, espe-
cially the ECM.
(d) Do not be careless during troubleshooting as there are
numerous transistor circuits and contact with terminals
can cause further trouble.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent the entry of water. Also, when washing the engine
compartment, prevent water from getting on the MFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring con-
nectors.
(i) Release the lock and pull out the connector, pulling on the
connectors.
(j) Fully insert the connector and check that it is locked.
(k) When inspecting a connector with a volt/ohmmeter.
(l) Carefully take off the water-proofing rubber if it is a wa-
ter-proof type connector.
(m) Insert the tester probe into the connector from the wiring
side when checking the continuity, amperage or voltage.
(n) Do not apply unnecessary force to the terminal.
(o) After checking, install the water-proofing rubber securely
on the connector.
(p) Use SST for inspecting or testing the injector or its wiring
connector.
SST 09842-30070
8. FUEL SYSTEM
(a) When disconnecting the high fuel pressure line, a large
amount of gasoline will spill out, so observe these proce-
dures:
(1) Disconnect the fuel pump connector.
(2) Start the engine. After the engine has stopped on
its own, turn the ignition switch.
(3) Put a container under the connection.
(4) Slowly loosen the connection.
(5) Disconnect the connection.
(6) Plug the connection with a rubber plug.
(7) Reconnect the fuel pump connector.