1996 Toyota Srs Dtc14

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 seconds.

(b) Clear malfunction code stored in memory. (See page DI-148 )

(c) Turn ignition switch to LOCK, and wait at least 20 seconds.

(d) Turn ignition switch to ACC or ON, and wait at least 20 seconds.

(e) Using SST, connect terminals Tc and E1 of DLC1. SST 09843-18020

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.

H00014

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.

PREPARATION:

(a) Turn ignition switch to LOCK.

(b) Disconnect connector between airbag sensor assembly and spiral cable.

(c) Turn ignition switch ON. CHECK:

Measure voltage at D+ on spiral cable side of connector between spiral cable and steering wheel pad and body ground. OK:

Voltage: 0 V

Repair or replace harness or connector between airbag sensor assembly and spiral cable.

DI4ME-02

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 Condition

Trouble Area

14

IBhort circuit in D+ wire harness or D- wire harness of squib ID squib malfunction IBpiral cable malfunction lAirbag sensor assembly malfunction

IBteering wheel pad (D squib) IBpiral cable lAirbag sensor assembly IWire harness

WIRING DIAGRAM

Refer to page DI-155 for the WIRING DIAGRAM.

INSPECTION PROCEDURE

P Squib

D Squib

Spiral Cable

D Squib

R05901

R14286 R12666

R05901

R14286 R12666

Airbag Sensor Assembly

PREPARATION:

Using a service wire, connect D+, and D- on airbag sensor assembly 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 Q

s"t996TER€EL (RM440U)

H00231

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) 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 seconds.

(b) Clear malfunction code stored on memory (See page DI-148 ).

(c) Turn ignition switch to LOCK, and wait at least 20 seconds.

(d) Turn ignition switch to ACC or ON, and wait at least 20 seconds.

(e) Using SST, connect terminals Tc and E1 of DLC 1. SST 09843-18020

DTC 14 is not output.

HINT:

Codes other than code 14 may be output at this time, but they are not relevant to this check.

Airbag Sensor

Airbag Sensor

or or

DLC1

R05S96

AB011S AB0119 R13006 W02044

Code 14

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 seconds.

(b) Clear malfunction code stored in memory (See page DI-148 ).

(c) Turn ignition switch to LOCK, and wait at least 20 seconds.

(d) Turn ignition switch to ACC or ON, and wait at least 20 seconds.

(e) Using SST, connect terminals Tc and E1 of DLC 1. SST 09843-18020

DTC 14 is not output.

HINT:

Codes other than code 14 may be output at this time, but they are not relevant to this check.

H00018

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.

DI-171

Check spiral cable.

P Squib

Airbag Sensor Assembly

D Squib

P Squib

Airbag Sensor Assembly

D Squib

R05899 R14286

PREPARATION:

Disconnect connector between airbag sensor assembly and spiral cable.

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:OK:

Resistance: Below 1 Q

H00019

6 Check harness between airbag sensor assembly and spiral cable.

P Squib P Squib

Airbag Sensor Assembly

Spiral Cable

R05904

R14286 R12688

Spiral Cable

R05904

R14286 R12688

PREPARATION:

Using a service wire, connect D+ and D- on airbag sensor assembly connector. CHECK:

For the connector (on the airbag sensor assembly side) between the airbag sensor assembly and spiral cable, measure the resistance between D+ and D-. OK:

Resistance: Below 1 Q

NG \ Repair or replace harness or connector between airbag sensor assembly and spiral cable.

H00232

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.

DI4MF-02

DTC

31

Airbag Sensor Assembly Malfunction

CIRCUIT DESCRIPTION

The airbag sensor assembly consists of a airbag sensor, safing sensor, drive circuit, diagnosis circuit and ignition control, etc.

It receives signals from the airbag sensor, judges whether or not the SRS must be activated, and diagnostic system malfunction.

DTC 31 is recorded when occurrence of a malfunction in the airbag sensor assembly is detected.

DTC No.

DTC Detection Condition

Trouble Area

31

lAirbag sensor assembly malfunction

lAirbag sensor assembly

INSPECTION PROCEDURE

HINT:

When a malfunction code other than code 31 is displayed at the same time, first repair the malfunction indicated by the malfunction code other than code 31.

Check voltage at IG2 and ACC of airbag sensor assembly.

Airbag Sensor Assembly

/ \

PREPARATION:

(a) Connect negative (-) terminal cable to battery.

(b) Turn ignition switch ON. CHECK:

Measure voltage between terminals IG2 and ACC of airbag sensor assembly and body ground.

Voltage: Below 16 V

Check battery and charging system (See page CH-2 ).

H00021

DLC1

DLC1

AB0118 AB0119 R13006 FI1394

AB0118 AB0119 R13006 FI1394

Code 31

JUUUL

PREPARATION:

Clear malfunction code. CHECK:

(a) Turn ignition switch to LOCK, and wait at least 20 seconds.

(b) Turn ignition switch to ACC or ON, and wait at least 20 seconds.

(c) Repeat operation in step (a) and (b) at least 5 times.

(d) Using SST, connect terminals Tc and E1 of DLC 1. SST 09843-18020

Using simulation method, reproduce malfunction symptoms (See page IN-16 ).

H00022

Replace airbag sensor assembly.

DI4MH-02

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 Condition

Trouble Area

54

iDpen circuit in P+ wire harness or P- wire harness of squib iP squib malfunction iAirbag sensor assembly malfunction

iFront passenger airbag assembly (P squib) «Airbag sensor assembly •Wire harness

WIRING DIAGRAM

Refer to page DI-155 for the WIRING DIAGRAM.

INSPECTION PROCEDURE

P Squib

D Squib

Spiral Cable

R14286 R12689 R14725

P+

P+

n D dd

□□□□□□

P Squib

Airbag Sensor Assembly

PREPARATION:

Using a service wire, connect P+ and P- on airbag sensor assembly connector. CHECK:

For the connector (on the airbag sensor assembly side) between the airbag sensor assembly and front passenger airbag assembly measure the resistance between P+ and P-. OK:

Resistance: Below 1 Q

Repair or replace harness or connector between airbag sensor assembly and front passenger airbag assembly.

H08146

DLC1

or or

DLC1

Code 54

AB0069 W01934 AB0118 AB0119 R13006 W02045

tiUUUUUUUUL

AB0069 W01934 AB0118 AB0119 R13006 W02045

PREPARATION:

(a) Connect connector to airbag sensor assembly.

(b) Using a service wire, connect P+ and P- on airbag sensor assembly side of connector between airbag sensor assembly and front passenger airbag assembly.

(c) 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 seconds.

(b) Clear malfunction code stored in memory (See page DI-148).

(c) Turn ignition switch to LOCK, and wait at least 20 seconds.

(d) Turn ignition switch to ACC or ON, and wait at least 20 seconds.

(e) Using SST, connect terminal Tc and E1 of DLC1. SST 09843-18020

DTC 54 is not output.

HINT:

Codes other than code 54 may be output at this time, but they are not relevant to this check.

H00024

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 seconds.

(b) Clear malfunction code stored in memory (See page DI-148 ).

(c) Turn ignition switch to LOCK, and wait at least 20 seconds.

(d) Turn ignition switch to ACC or ON, and wait at least 20 seconds.

(e) Using SST, connect terminals Tc and E1 of DLC1. SST 09843-18020

DTC 54 is not output.

HINT:

Codes other than code 54 may be output at this time, but they are not relevant to this check.

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.

DI4MI-02

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 Condition

Trouble Area

(Normal)

Source voltage drop.

IBattery lAirbag sensor assembly

WIRING DIAGRAM

Airbag

Sensor

Assembly

Airbag

Sensor

Assembly

H09396

INSPECTION PROCEDURE

PREPARATION:

(a) Disconnect negative (-) terminal cable from the battery, and wait at least 90 seconds.

(b) Remove steering wheel pad (See page SR-13).

(c) Disconnect connector of front passenger airbag assembly (See page RS-21 ).

(d) Disconnect connector of airbag sensor assembly (See page RS-33).

CAUTION:

Store the steering wheel pad with the front surface facing upward.

Toyota Tercel

PREPARATION:

(a) Connect negative (-) terminal cable to battery.

(b) Turn ignition switch ON. CHECK:

Measure voltage at IG2 or ACC on sensor and operate electric system. (defogger, wiper, headlight, heater blower, etc.) OK:

Check the harness between battery and airbag sensor assembly, check the battery and charging system.

AB0119 AB0234

PREPARATION:

(a) Turn ignition switch to LOCK.

(b) Connect steering wheel pad connector.

(c) Connect front passenger airbag assembly connector.

(d) Connect airbag sensor assembly connector.

(e) Turn ignition switch ON. CHECK:

Operate electric system checked in defogger, wiper, headlight, heater blower, etc. and check that SRS warning light goes off.

Check for DTCs. If a DTC is output, perform troubleshooting for the DTC. If a normal code is output, replace airbag sensor assembly.

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.

H00003

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