ABS TOYOTA TERCEL 1996 Service Owner's Manual

DI-68
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
4 Check EGR vacuum modulator (See page EC-7).
NG Repair or replace.
OK
5 Check EGR valve (See page EC-7).
NG Repair or replace.
OK
6 Check manifold absolute pressure sensor (See page DI-23).
NG Repair or replace.
OK
Check and replace ECM (See page IN-26).
OBD II scan tool (excluding TOYOTA hand-held tester):
1 Check connection of vacuum hose, EGR hose (See page EC-2).
NG Repair or replace.
OK

DI-70
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
5 Check EGR valve (See page EC-7).
NG Repair or replace.
OK
6 Check manifold absolute pressure sensor (See page DI-23).
NG Repair and replace.
OK
Check and replace ECM (See page IN-26).

- DIAGNOSTICSENGINE
DI-71
1996 TERCEL (RM440U)
DTC P0402 Exhaust Gas Recirculation Flow Excessive
Detected
CIRCUIT DESCRIPTION
Refer to DTC P0402 on page DI-65.
DTC No.DTC Detection ConditionTrouble Area
P0402
After the engine is warmed up, conditions (a) and (b) continue
(a) The intake manifold absolute pressure is larger than the
value calculated by the ECM while the EGR system is ON
(b) Misfiring is detected during idling
(2 trip detection logic)
EGR valve stuck open

Vacuum or EGR hose is connected to wrong post

Manifold absolute pressure sensor

ECM
INSPECTION PROCEDURE
HINT:

If DTC P0105 and/or P0106 and P0402 are output simultaneously, perform troubleshooting of DTC
P0105 first.

If DTC P0401 and P0402 are output simultaneously, perform troubleshooting of DTC P0402 first.
1 Check connection of vacuum hose, EGR hose (See page EC-2).
NG Repair or replace.
OK
2 Check EGR valve (See page EC-7).
NG Repair or replace.
OK
3 Check VSV for EGR (See page DI-65).
OK Go to step 5.
NG
DI95Q-01

DI-72
- DIAGNOSTICSENGINE
1996 TERCEL (RM440U)
4 Check operation of the for EGR (See page EC-7).
NG Replace VSV for EGR.
OK
Check for open and short in harness and con-
nector between engine room R/B and ECM
(See page IN-26).
5 Check EGR vacuum modulator (See page EC-7).
NG Repair or replace.
OK
6 Check manifold absolute pressure sensor (See page DI-23).
NG Repair or replace.
OK
Check and replace ECM (See page IN-26).

DI4LO-01
ABS Check SheetInspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration Year Registration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
Remains ONDoes not Light Up
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
ABS does not operate.
ABS Warning Light
AbnormalABS does not operate intermittently. DI-1 10
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
CUSTOMER PROBLEM ANALYSIS CHECK

R12149
DI4LP-02
FI6443
Short Pin
DLC1
R13006
DLC1
E
1
Tc
R01346
Normal Code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF0.5 sec.
Code 11 and 21
4 sec.1.5
sec.2.5 sec.
Code 11Code 21
2 sec.
0.5 sec.
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-1 11
1996 TERCEL (RM440U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
When the ignition switch is turned ON, check that the ABS
warning light goes on for 3 seconds.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting for the ABS warning light circuit (See page DI-138).
(b) Check the DTC.
(1) Turn the ignition switch ON.
(2) Disconnect the short pin from the DLC1.
(3) Using SST, connect terminals Tc and E
1 of the
DLC1.
SST 09843-18020
(4) Read the DTC from the ABS warning light on the
combination meter.
HINT:

If no code appears, inspect the diagnostic circuit or ABS
warning light circuit (See page DI-141 or DI-138).

As an example, the blinking patterns for normal code and
codes 11 and 21 are shown in the illustration.
(5) Code are explained in the code table on page
DI-1 15.
(6) After completing the check, disconnect terminals Tc
and E
1, and turn off the display.
If 2 or more malfunctions are indicated at the same time, the
lowest numbered DTC will be displayed 1st.

R13006
DLC1
E
1
TcTs
BR3904
0.13 sec. 0.13 sec.
ON
OFF
BR3893
Malfunction Code (Example Code 72, 76)
72 67
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec.4 sec.
Repeat
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-1 13
1996 TERCEL (RM440U)
2. SPEED SENSOR SIGNAL CHECK
(a) Check the speed sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI-138).
(5) Drive the vehicle faster than 45 km/h (28 mph) for
several seconds.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E
1 of the
DLC1.
SST 09843-18020
(8) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTCs shown on the next page.

If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(9) After doing the check, disconnect terminals Ts and
E
1, and Tc and E1 of the DLC1, and turn ignition
switch OFF.

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