1996 TOYOTA TERCEL wiring

W00708
A6 L
Battery 2Motor
RelayABS ECU
R-L W-BL
L
A7
A7
1
6
A7
A7
4
A75 1
3
A6
Solenoid
Relay
ABS ECU
ABS ECU W-B
W-B
EA
ABS Control Relay
DLC1
22
EB
ABS ActuatorEA110 13IC2 1E
Y
23
Short Pin
A5
4
ABS ECU Y
EA1R-L R-L
R-LR-L
R-L
1 Driver Side J/B
C7
C8 7
GAUGE
Light ABS Warning 1
3
ABS ECU
A1218
WA12 V
L-R DI-138
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
1996 TERCEL (RM440U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory.
After removing the short pin of the DLC1, connect between terminals Tc and E
1 of the DLC1 to make the
ABS warning light blink and output the DTC.
WIRING DIAGRAM
DI4LZ-02

R12884
SRS ECU
A1212 V
EA14
Tc
E
1
J/C
A A
DLC111
EC
BR
Tc
325
P-B P-B P-BABS ECU
J1
BR
R13006
TcE1
DLC1
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-141
1996 TERCEL (RM440U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting between terminals Tc and E1 of the DLC1 cause the ECU to display the DTC by flashing the ABS
warning light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Tc and E
1 of the
DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Tc
and E
1 are connected, ECU may be defective.
NG
DI4M0-02

F00414
24ABS ECU
AA123DLC1
Ts
16
EC
E1TsL
B-RAEA13
B-RL12 V
J/C
J1
R13006
E1
DLC1
Tc
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-143
1996 TERCEL (RM440U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with
the DTC check.
Connecting terminals Ts and E
1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Ts and E
1 of the
DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Ts
and E
1 are connected, ECU may be defective.
NG
DI4M1-02

DI4MB-02
R15075
D squib (w/o Front Passenger Airbag)
1
Spiral
2
D
-
D+
Airbag Sensor Assembly
Cable
B
4
3 (w/ Front Passenger Airbag)
D squib
Spiral
Cable
1
2W
P squib1
22
1 D
-
D+2
1
P
-
P+
B
B W
W
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-155
1996 TERCEL (RM440U)
CIRCUIT INSPECTION
DTC 11 Short in Squib Circuit (to Ground)
CIRCUIT DESCRIPTION
The squib circuit consists of the airbag sensor assembly, spiral cable, steering wheel pad and front passen-
ger airbag assembly. If causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see FUNCTION OF COMPONENTS on page RS-2.
DTC 11 is recorded when ground short is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
11

Short circuit in squib wire harness (to ground)

Squib malfunction

Spiral cable malfunction

Airbag sensor assembly malfunction
Steering wheel pad (D squib)

Front passenger airbag assembly (P squib)

Spiral cable

Airbag sensor assembly

Wire harness
WIRING DIAGRAM

AB0119
W01931
R14300
H00010
Airbag Sensor
Assembly
Spiral
Cable ON
P Squib
D Squib
D+
(+) (-)D-
DI-162
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
DTC 12 Short in Squib Circuit (to B+)
CIRCUIT DESCRIPTION
The squib circuit consists of the airbag sensor assembly, spiral cable, steering wheel pad and front passen-
ger airbag assembly. It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each components, see FUNCTION OF COMPONENTS on page RS-2.
DTC 12 is recorded when a B+ short is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
12

Short circuit in squib wire harness (to B+)

Squib malfunction

Spiral cable malfunction

Airbag sensor assembly malfunction
Steering wheel pad (D squib)

Front passenger airbag assembly (P squib)

Spiral cable

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
Refer to page DI-155 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI-177)
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the voltage between
D
+, D- and body ground.
OK:
Voltage: 0 V
NG Go to step 7.
OK
DI4MC-02

H00231
Airbag Sensor
Assembly
Spiral
Cable P Squib
D Squib
D+ D-
D+ D-
DI-168
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
DTC 14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad. It causes
the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each components, see FUNCTION OF COMPONENTS on page RS-2.
DTC 14 is recorded when an open is detected in the D squib circuit.
DTC No.DTC Detection ConditionTrouble Area
14

Short circuit in D+ wire harness or D- wire harness of
squib

D squib malfunction

Spiral cable malfunction

Airbag sensor assembly malfunction
Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
Refer to page DI-155 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Preparation (See step 1 on page DI-177)
2 Check D squib circuit.
PREPARATION:
Using a service wire, connect D+, and D- on airbag sensor as-
sembly connector.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the resistance between
D
+ and D-.
OK:
Resistance: Below 1 W
NG Go to step 5.
OK
DI4ME-02

R14286R12689R14725H08146
P+
P-
Airbag Sensor
Assembly P Squib
D SquibSpiral
CableP-
P+
DI-174
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
DTC 54 Open in P Squib Circuit
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passenger airbag assembly. It causes
the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each components, see FUNCTION OF COMPONENTS on page RS-2.
DTC 54 is recorded when an open is detected in the P squib circuit.
DTC No.DTC Detection ConditionTrouble Area
54

Open circuit in P+ wire harness or P- wire harness of
squib

P squib malfunction

Airbag sensor assembly malfunction
Front passenger airbag assembly (P squib)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
Refer to page DI-155 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Preparation (See step 1 on page DI-177)
2 Check P squib circuit.
PREPARATION:
Using a service wire, connect P+
and P- on airbag sensor as-
sembly connector.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the airbag sensor assembly and front passenger airbag
assembly measure the resistance between P
+ and P-.
OK:
Resistance: Below 1 W
NG Repair or replace harness or connector be-
tween airbag sensor assembly and front pas-
senger airbag assembly.
OK
DI4MH-02

H09396
MAIN
FL
B
ALT
B-RB-R
2 2
Engine
Room
R/B
AM1
W-GDriver Side J/B
1
1J
1BW-G 2ACC
AM13
B-Y4
1B
1H
CIG/RADIO Driver Side J/B
G-R*1
10
ACCAirbag
Sensor
Assembly
8
*2
B-OIG2 *1
9
7
*2 2
1H 1B5
IGN B-W 6
AM2
Ignition
Switch 7 B-R 12
IC1 B-R
2
AM2
EA2 1
B*1: USA
*2: CANADA EA214
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-177
1996 TERCEL (RM440U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different to other circuits-when the SRS warning
light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly and the source voltage returns to
normal, the SRS warning light automatically goes off.
DTC No.DTC Detection ConditionTrouble Area
(Normal)Source voltage drop.
Battery

Airbag sensor assembly
WIRING DIAGRAM
DI4MI-02