TOYOTA TERCEL 1996 Service Repair Manual

R05901
R14290H00004
Airbag Sensor
Assembly
P Squib
D SquibSpiral
Cable
D+
D-
DI-156
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
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 resistance between
D
+, D- and body ground.
OK:
Resistance: 1MW or higher
NG Go to step 7.
OK

R05896 R14291H00005
Spiral
CableAirbag Sensor
Assembly
P Squib
D SquibP+
P-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-157
1996 TERCEL (RM440U)
3 Check P squib circuit.
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
+, P- and body
ground.
OK:
Resistance: 1MW or Higher
NG Repair or replace harness or connector be-
tween the airbag sensor assembly and front
passenger airbag assembly.
OK

AB0069
W01933
AB0118
R13006AB0069
AB0118
W02042
H00006
Airbag Sensor
Assembly
Spiral
Cable P Squib
D SquibP+
P-
D+ D-ACCON
or
Code 11
DLC1
Tc
E1
DI-158
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
4 Check airbag sensor assembly.
PREPARATION:
(a) Connect connector to airbag sensor assembly.
(b) Using a service wire, connect D+ and D- on spiral cable
side of connector between spiral cable and steering
wheel pad.
(c) Using a service wire, connect P+ and P- on airbag sensor
assembly side of connector between airbag sensor as-
sembly and front passenger airbag assembly.
(d) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory.
(See page DI-148)
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC 1.
SST 09843-18020
(f) Check DTC
OK:
DTC 11 is not output.
HINT:
Codes other than code 11 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK

R05896
AB0118
R13006AB0119
W02042
H00007
Spiral
Cable P Squib
D Squib
ACCON
or
DLC1Code 11
E1TcAirbag Sensor
Assembly
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-159
1996 TERCEL (RM440U)
5 Check D squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect steering wheel pad connector.
(d) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory.
(See page DI-148)
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC 1.
SST 09843-18020
(f) Check DTC.
OK:
DTC 11 is not output.
HINT:
Codes other than code 11 may be output at this time, but they
are not relevant to this check.
NG Replace steering wheel pad.
OK

R05897
AB0118
R13006AB0119
W02042H00008
Airbag Sensor
Assembly
Spiral
Cable P Squib
D Squib
ACCON
or
DLC1
E1TcCode 11
DI-160
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
6 Check P squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect front passenger airbag assembly connector.
(d) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory.
(See page DI-148)
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC 1.
SST 09843-18020
(f) Check DTC.
OK:
DTC 11 is not output.
HINT:
Codes other than code 11 may be output at this time, but they
are not relevant to this check.
NG Replace front passenger airbag assembly.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.

R05899
R14301H00009
Airbag Sensor
Assembly
Spiral
Cable P Squib
D Squib
D+
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-161
1996 TERCEL (RM440U)
7 Check spiral cable.
PREPARATION:
Disconnect connector between airbag sensor assembly and
spiral cable.
CHECK:
Measure resistance between D+ on spiral cable side of connec-
tor between spiral cable and steering wheel pad and body
ground.
OK:
Resistance: 1MW or Higher
NG Repair or replace spiral cable.
OK
Repair or replace harness or connector be-
tween airbag sensor assembly and spiral
cable.

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

R05898 AB0119
R14300H00011
ON
P+
(+) (-)
Airbag Sensor
Assembly
P Squib
D Squib
Spiral
CableP-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-163
1996 TERCEL (RM440U)
3 Check P squib circuit.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween airbag sensor assembly and front passenger airbag as-
sembly, measure the voltage between P
+, P- and body ground.
OK:
Voltage: 0V
NG Repair or replace harness or connector be-
tween the airbag sensor assembly and front
passenger airbag assembly.
OK

AB0069
AB0069
AB0118
R13006AB0119W01933
W02043
H00012
Airbag Sensor
Assembly P+
P-
Spiral
Cable P Squib
D Squib
D-D+ACC ON
or
DLC1Code 12
E1Tc
DI-164
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TERCEL (RM440U)
4 Check airbag sensor assembly.
PREPARATION:
(a) Connect connector to airbag sensor assembly.
(b) Using a service wire, connect D
+ and D- on spiral cable
side of connector between spiral cable and steering
wheel pad.
(c) Using a service wire, connect P
+ and P- on airbag sensor
assembly side of connector between airbag sensor as-
sembly and front passenger airbag assembly.
(d) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory.
(See page DI-148)
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843-18020
(f) Check DTC.
OK:
DTC 12 is not output.
HINT:
Codes other than code 12 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK

R13006 R05896
AB0118 AB0019W02043H00013
Airbag Sensor
Assembly
P Squib
D Squib
Spiral
Cable
ACCON
or
DLC1Code 12
E1 Tc
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-165
1996 TERCEL (RM440U)
5 Check D squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect steering wheel pad connector.
(d) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory.
(See page DI-148)
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843-18020
(f) Check DTC.
OK:
DTC 12 is not output.
HINT:
Codes other than code 12 may be output at this time, but they
are not relevant to this check.
NG Replace steering wheel pad.
OK