1996 TOYOTA TERCEL ECU

- MAINTENANCEINSIDE VEHICLE
MA-3
41 Author
: Date
:
1996 TERCEL (RM440U)
13. ACCELERATOR PEDAL
Check the pedal for smooth operation and uneven pedal effort or catching.
14. CLUTCH PEDAL (See page CL-2)
(a) Check the pedal for smooth operation.
(b) Check that the pedal has the proper freeplay.
15. BRAKE PEDAL (See page BR-6)
(a) Check the pedal for smooth operation.
(b) Check that the pedal has the proper reserve distance and freeplay.
(c) Check the brake booster function.
16. BRAKES
At a safe place, check that the brakes do not pull to one side when applied.
17. PARKING BRAKE (See page BR-8)
(a) Check that the lever has the proper travel.
(b) On a safe incline, check that the vehicle is held securely with only the parking brake applied.
18. AUTOMATIC TRANSMISSION ºPARKº MECHANISM
(a) Check the lock release button of the selector lever for proper and smooth operation.
(b) On a safe incline, check that the vehicle is held securely with the selector lever in the P position and
all brakes released.

MA02M-05
- MAINTENANCEBODY
MA-9
47 Author
: Date
:
1996 TERCEL (RM440U)
BODY
INSPECTION
1. TIGHTEN BOLTS AND NUTS ON CHASSIS AND BODY
(a) Tighten the front seat-to-body mounting bolts.
Torque: 37 N´m (375 kgf´cm, 27 ft´lbf)
(b) Under Severe Conditions:
In addition to the above maintenance items, check for
loose or missing nuts and bolts on the steering system,
drive train, suspension system, fuel tank mounts, engine
mounts, etc.
2. FINAL INSPECTION
(a) Check the operation of the body parts:

Hood:
Auxiliary catch operates properly
Hood locks securely when closed

Front and rear doors:
Door lock operates properly
Doors close properly

Luggage compartment door:
Door lock operates properly

Seats:
Seat adjusts easily and locks securely in any posi-
tion
Front seat back locks securely in any position
Folding-down rear seat backs lock securely
(b) Road test:

Check the engine and chassis for abnormal noises.

Check that the vehicle does not wander or pull to
one side.

Check that the brakes work properly and do not
drag.
(b) Be sure to deliver a clean car.
Especially check the steering wheel, shift lever knob, all
switch knobs, door handles and seats.

- DIAGNOSTICSENGINE
DI-7
1996 TERCEL (RM440U)
(b) Clear the DTC.
The following actions will erase the DTC and freezed
frame data.
(1) Operating the OBD II scan tool (complying with SAE
J1978) or TOYOTA hand-held tester to erase the
codes. (See the OBD II scan tool's instruction book
for operating instructions.)
(2) Disconnecting the battery terminals or EFI fuse.
NOTICE:
If the TOYOTA hand-held tester switches the ECM from
normal mode to check mode or vice-versa, or if the igni-
tion switch is turned from ON to ACC or OFF during check
mode, the DTC and freezed frame data will be erased.
4. FAIL-SAFE CHART
If any of the following codes is recorded, the ECM enters fail-safe mode.
DTC No.Fail-Safe OperationFail-Safe Deactivation Conditions
P0105Ignition timing fixed at 5° BTDCReturned to normal condition
P0110Intake air temp. is fixed at 20°C (68°F)Returned to normal condition
P0115Engine coolant temp. is fixed at 80°C (176°F)Returned to normal condition
P0120VTA is fixed at 0°
The following condition must be repeated at least 2 times
consecutively
When closed throttle position switch is ON:
0.1 V
VTA
0.95 V
P0141The heater circuit in which an abnormality is detected is
turned offIgnition switch OFF
P0325Max. timing retardationIgnition switch OFF
P1300Fuel cutIGF signal is detected for 4 consecutive ignitions
5. CHECK FOR INTERMITTENT PROBLEMS
HINT:
TOYOTA hand-held tester only:
By putting the vehicle's ECM in check mode, 1 trip detection logic is possible instead of 2 trip detection logic
and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.
(a) Clear the DTC (See page DI-13).
(b) Set the check mode (See page DI-13).
(c) Perform a simulation test (See page IN-26).
(d) Check the connector and terminal (See page IN-26).
(e) Handle the connector (See page IN-26).
6. BASIC INSPECTION
When the malfunction code is not confirmed in the DTC check, troubleshooting should be performed in the
order for all possible circuits to be considered as the causes of the problems. In many cases, by carrying
out the basic engine check shown in the following flow chart, the location causing the problem can be found
quickly and efficiently. Therefore, use of this check is essential in engine troubleshooting.
1 Is battery positive voltage 11V or more when engine is stopped ?
NO Charge or replace battery.

BR3890
FI6443
Short Pin
DLC1
N09348
Interface Box
Harness VehicleTOYOTA
Tester Hand-held
TOYOTA Break-out-box DI-1 12
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
(c) Clear the DTC.
(1) Using SST, connect terminals Tc and E
1 of the
DLC1 and remove the short pin from the DLC1.
SST 09843-18020
(2) IG switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 or more times within 3 seconds.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of the DLC1.
SST 09843-18020
(6) Connect the short pin to the DLC1.
HINT:
Cancellation can also be done by removing the DOME fuse , but
in this case, other memory systems will also be cancelled out.
(d) Using TOYOTA break-out-box and TOYOTA hand-held
tester, measure the ECU terminal values.
(1) Hook up the TOYOTA hand-held tester and TOYO-
TA break-out-box to the vehicle.
(2) Read the ECU input/output values by following the
prompts on the tester screen.
HINT:
TOYOTA hand-held tester has a ºSnapshot º function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand-held tester/TOYOTA break
out-box operators manual for further details.

DI4LQ-02
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-1 15
1996 TERCEL (RM440U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Using SST 09843-18020, connect the terminals Tc and E
1, and remove the short pin.
If a malfunction code is displayed during the DTC check, check the circuit listed for that the code. For details
of each code, turn to the page referred to under the ºSee pageº for respective ºDTC No.º in the DTC chart.
DTC No.
(See page)Detection ItemTrouble Area
11
(DI-1 19)Open circuit in ABS control (solenoid) relay circuit

ABS control (solenoid) relay

Open or short in ABS control (solenoid) relay circuit

ECU
12
(DI-1 19)Short circuit in ABS control (solenoid) relay circuit

ABS control (solenoid) relay

B+ short in ABS control (solenoid) relay circuit

ECU
13
(DI-122)Open circuit in ABS control (motor) relay circuit

ABS control (motor) relay

Open or short in ABS control (motor) relay circuit

ECU
14
(DI-122)Short circuit in ABS control (motor) relay circuit

ABS control (motor) relay

B+ short in ABS control (motor) relay circuit

ECU
21
(DI-125)Open or short circuit in solenoid circuit for right front wheel

ABS actuator

Open or short in SFR circuit

ECU
22
(DI-125)Open or short circuit in solenoid circuit for left front wheel

ABS actuator

Open or short in SFL circuit

ECU
23
(DI-125)Open or short circuit in solenoid circuit for right rear wheel

ABS actuator

Open or short in SRR circuit

ECU
24
(DI-125)Open or short circuit in solenoid circuit for left rear wheel

ABS actuator

Open or short in SRL circuit

ECU
31
(DI-128)Right front wheel speed sensor signal malfunction
32
(DI-128)Left front wheel speed sensor signal malfunction
Right front, left front, right rear or left rear speed sensor
O htihd iit33
(DI-128)Right rear wheel speed sensor signal malfunction

Open or short in each speed sensor circuit

ECU
34
(DI-128)Left rear wheel speed sensor signal malfunction
41
(DI-132)Low battery positive voltage or abnormally high battery positive
voltage

Battery

IC regulator

Open or short in power source circuit

ECU
51
(DI-135)Pump motor is locked
Open in pump motor ground
ABS pump motor
Always ONMalfunction in ECU
ECU

DI4LR-01
W00983F15254
ABS ActuatorControl RelaySensor Rotor
Rear Speed Sensor ABS Warning Light
Sensor Rotor Front Speed Sensor
ABS ECU
DLC1
DI-1 16
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
PARTS LOCATION

DI98C-01
R03953
A13
1 2 3 4 5 6
7 8 9 10 11 1213
14 15
16 17 18 19 20 21 22 23 24 25 2612 11 12 3 4 5 6 7 8 9 10
A12
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-1 17
1996 TERCEL (RM440U)
TERMINALS OF ECU
Symbols (Terminal No.)Wiring ColorConditionSTD Voltage (V)
IG1 (A12-5) - GND (A13-7)B-Y - W-BIG switch ON10 - 14
SR (A12-20) - R+ (A12-4)G-B - L-BIG switch ON9 - 14
MR (A12-7) - R+ (A12-4)G-R - L-BIG switch ONBelow 1.0
SFRR (A13-5) - GND (A13-7)Y-R - W-BIG switch ON ABS warning light OFF10 - 14
SFRH (A13-6) - GND (A13-7)Y - W-BIG switch ON ABS warning light OFF10 - 14
SFLR (A12-2) - GND (A13-7)R-B - W-BIG switch ON ABS warning light OFF10 - 14
SFLH (A12-1) - GND (A13-7)P - W-BIG switch ON ABS warning light OFF10 - 14
SRRR (A12-15) -
GND (A13-7)L-W - W-BIG switch ON ABS warning light OFF10 - 14
SRRH (A12-14) -
GND (A13-7)R-W - W-BIG switch ON ABS warning light OFF10 - 14
SRLR (A13-11) - GND (A13-7)G-Y - W-BIG switch ON ABS warning light OFF10 - 14
SRLH (A13-12) -
GND (A13-7)Y-B - W-BIG switch ON ABS warning light OFF10 - 14
AST (A12-8) - GND (A13-7)LG - W-BIG switch ON ABS warning light OFF10 - 14
MT (A12-26) - GND (A13-7)LG-B e W-BIG switch ONBelow 1.5
WA (A12 18) GND (A13 7)RL WBIG switch ON ABS warning light ONBelow 2.0WA (A12-18) - GND (A13-7)R-L - W-BIG switch ON ABS warning light OFF10 - 14
STP (A12 12) GND (A13 7)GW WBStop light switch OFFBelow 1.5STP (A12-12) - GND (A13-7)G-W - W-BStop light switch ON8 - 14
Tc (A12-25) - GND (A13-7)P-B - W-BIG switch ON10 - 14
Ts (A12-24) - GND (A13-7)L - W-BIG switch ON10 - 14
FR+ (A12-10) - FR- (A12-9)B - WIG switch ON Slowly turn right front wheelAC generation
FL+ (A12-22) - FL- (A12-23)R - GIG switch ON Slowly turn left front wheelAC generation
RR+ (A13-8) - RR- (A13-9)L - LGIG switch ON Slowly turn right rear wheelAC generation
RL+ (A13-3) - RL- (A13-2)V - PIG switch ON Slowly turn left rear wheelAC generation

DI4LT-02
DI-1 18
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the relevant page for troubleshooting.
SymptomsSuspected AreaSee page
ABS does not operate
Only when 1 - 4 are all normal and the problem is still occurring, replace the ABS
ECU
6. Check the DTC, reconfirming that the normal code is output
7. IG power source circuit
8. Speed sensor circuit
9. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI-145).
DI-1 11
DI-132
DI-128
BR-35
ABS does not operate effi-
ciently
Only when 1 - 4 are all normal and the problem is still occurring, replace the ABS
ECU
1. Check the DTC, reconfirming that the normal code is output
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI-145)
DI-1 11
DI-128
DI-136
BR-35
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI-138
-
DTC check cannot be done
Only when 1 and 2 are all normal and the problem is still occurring, replace the
ABS ECU
1. ABS warning light circuit
2. Tc terminal circuit
DI-138
DI-141
Speed sensor signal check
cannot be done1. Ts terminal circuit
2. ABS ECUDI-143
-