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5

Remove left trim plate.

6

Loosen all the SRS unit connectors.

7

Check the wire harness between the connector terminals of SRS unit and that of clock spring for the

following:

Ground.

Short circuit with power supply.

Open circuit.

8

Is the above-mentioned wire harness normal?

9

Normal: completion of trouble diagnosis, and install all the parts.

Abnormal: replace the wire harness.

6. Passenger side trouble

DIAGNOSTIC PROCEDURES

(1) Is there any passenger airbag assembly installed on the vehicle?

Yes: continue with next step.

No: continue with step (5).

(2) Check the cautions of passenger airbag assembly connector

If it is not handled properly, the airbag assembly may be triggered and deployed, leading to serious injury

to a person. Therefore, prior to handling, read the service cautions carefully.

See service cautions for SRS.

DTC
B1 352
B1 353
B1 354
B1 355

CAUTION
● If it is not handled properly, the airbag assembly and retractable seat belt may be
triggered and deployed/tensioned, leading to serious injury to a person. Therefore, prior
to handling, read the service cautions carefully.
See service cautions for SRS.
If there is passenger airbag
● The resistance between pins 13 and 14 of SRS unit connector is out of range
● The wire harness between pins 13 and 14 of the SRS unit is short circuited
● Pins 13 and 14 of the SRS unit connector are open circuited, e.g. there is no
passenger airbag
● Passenger airbag assembly trouble
●Trouble of the connector between passenger airbag assembly and SRS ECU
● Trouble of the connector between the SRS unit and ground point
●The circuit between passenger airbag assembly and SRS ECU is open or short
●The circuit between SRS unit and ground point is open or short
●SRS unit trouble

Passenger airbag assembly trouble (high or low resistance, short circuit, ground, etc.)

Checking
conditions

Possible Cause

258

1

Turn the ignition switch to LOCK.

2

Loosen the negative terminal cable from the battery and wait for over 1 minute.

3

Remove the glove box.

4

Loosen the passenger airbag assembly connectors.

5

Is the connector of the passenger airbag assembly normal?

Normal: [DTC of present trouble]

Continue with next step.

[DTC of past trouble]

Continue with next step.

Abnormal: replace the wire harness.

(3) Ascertain the trouble exists in passenger airbag assembly or other part

1

Connect a new assembly to terminals A and B of the connector of passenger airbag assembly.

2

Connect the negative (-) terminal cable of the battery.

3

Turn the ignition switch ON.

4

Any DTC displayed? Can it be cleared?

No: continue with next step.

Yes: replace passenger airbag assembly

See SRS- Passenger Airbag Assembly, Removal & Installation.

(4) Check the wire harness between passenger airbag assembly and SRS ECU

1

Turn the ignition switch to LOCK.

2

Loosen the negative (-) terminal cable from the battery and wait for over 1 minute.

3

Remove steering column hood.

4

Loosen the connector of the clock spring.

5

Loosen the connectors of driver and passenger airbag assemblies.

6

Remove left trim plate.

7

Loosen all the SRS unit connectors.

8

Check the circuit between the connector terminals of the SRS ECU and that of passenger airbag assembly

and the circuit between the connector terminal of the SRS unit and that of passenger airbag assembly for

the following:

Ground.

Short circuit with power source.

Open circuit.

9

Are the above-mentioned wire harnesses normal?

Normal: completion of trouble diagnosis.

Abnormal: replace the related wire harness.

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III. DIAGNOSIS OF CRASHED VEHICLEs

Whether the SRS is deployed or not, the checking and maintenance of the crashed vehicle shall be carried

out according to the following procedures.

1.  Check the diagnostic signal of ECU

(1) Connect the check connector of the Hi-DS T Scan Meter.

(2) Read out the diagnostic results from Hi-DS T Scan Meter.

2. Repair procedures

(1) When the SRS is deployed, the following parts shall be renewed.

1

Passenger airbag assembly.

2

ECU.

3

Driver airbag assembly.

Check the following parts, if abnormal, replace with new ones.

1

Clock spring.

2

Steering wheel, steering column and steering lower shaft

   component.

The installation status of driver airbag assembly in relation to steering wheel.

1

Check and see if there is abnormal noise in the steering wheel, the action of the same is good,

   or the clearance is normal.

2

Check the union joint of the wire harness for damage and the terminal for distortion.

3. ECU

(1)  Check the brackets of the ECU Case for recess, crack, distortion, etc.

(2) Check the union joint for damage and terminal for distortion.

(3) Check the installation status of he ECU brackets

1

Check the hood for recess, crack, distortion, etc.

2

Check the union joint for damage, terminal for distortion

   and wire harness for seizure.

3

Check the case of the gas generator for recess,

    crack and distortion.

NOTICE

Due to shock, when the battery power

supply is insufficient, the scan Meter

cannot communicate with ECU, the

instrument panel wire harness shall be

checked and maintained or external

power source shall be used.

260

(4) Check the installation status of the airbag assembly.

4. Driver airbag assembly (see the figure below)

5. Clock spring (see the figure on the right)

(1) Check the union joint and protecting tube for damage and the

terminal for distortion.

(2) Check the case for distortion.

6. Steering wheel, steering column and steering lower shaft component.

(1) Check the installation status of driver airbag assembly.

(2) Check the steering wheel for any abnormal noise and see if the

clearance is normal.

7. Check the wire harness joint (instrument panel wire harness).

8. Check and see if the wire harness is securely installed, if the joint is damaged and if the terminal is

distorted.

NOTICE

1. Work must be started 60s after the negative (-) terminal cable is disconnected from battery. The

disconnected negative (-) terminal cable shall be protected with insulating tape for insulation.

2. Airbag assembly and clock spring shall not be removed or repaired. They shall be replaced if there is

any trouble.

3. Pay enough attention to airbag assembly and clock spring when using, avoiding dropping them onto the

ground or into water or oil. In addition, if there is any pitting, crack or distortion on them, replace with

new ones.

4. When an airbag is deployed, the deployed surface should face up. It should be kept on a flat surface

without any other items on it.

5. Don’t keep an airbag in a place where the temperature is higher than 93°C.

6. When an airbag is deployed, it shall be replaced with a new one; simultaneously, check the clock spring,

and replace it with a new one if found abnormal.

7. When deal with the deployed airbag, gloves and protective glasses are to be used.

8. When scrapping the undeployed airbag, it shall be discarded after being deployed.

Generator

Bracket

Driver Side 

Clock Spring

To Horn

To Driver Module