System malfunction location

• B1227:4A:Passenger-side pressure sensor ID mismatch

• B1227:87:Passenger-side pressure sensor circuit open

• B1227:29, B1227:96:Passenger-side pressure sensor internal malfunction

Detection condition

WARNING:

• Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure.

• Wiring harness between the passenger-side pressure sensor and SAS control module has a malfunction

• Passenger-side pressure sensor has a malfunction

Fail-safe function

Not applicable

Possible cause

• Passenger-side pressure sensor connector malfunction

• Open circuit in the wiring harness between the passenger-side pressure sensor and SAS control module

• Passenger-side pressure sensor malfunction

• SAS control module malfunction

Step

Inspection

Action

1

• Verify that the passenger-side pressure sensor is correctly installed.

• Is the passenger-side pressure sensor correctly installed?

Yes

Go to the next step.

No

Correctly install the passenger-side pressure sensor.

Then go to the next step.

2

WARNING:

• Handling the component parts improperly can accidentally operate (deploy) the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings/cautions and the workshop manual before handling the air bag system components.

  (See AIR BAG SYSTEM SERVICE WARNINGS [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) (See AIR BAG SYSTEM SERVICE CAUTIONS [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Remove the passenger-side door trim.

  (See DOOR TRIM REMOVAL/INSTALLATION.)

• Disconnect the passenger-side pressure sensor connector.

  (See PRESSURE SENSOR REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Inspect the passenger-side pressure sensor connector. (Corrosion, damage, and disconnected pins)

• Is there any malfunction of the passenger-side pressure sensor connector?

Yes

Replace the malfunctioning part, then go to Step 4.

No

Go to the next step.

3

• Passenger-side pressure sensor and SAS control module connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• Passenger-side pressure sensor terminal A???SAS control module terminal 1B

• Passenger-side pressure sensor terminal B???SAS control module terminal 1F

NOTE:

• Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side pressure sensor.

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and passenger-side pressure sensor terminal.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has an open circuit.

Go to Step 4.

4

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more.

• Connect the SAS control module connectors.

• Reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Clear the DTC for the SAS control module using the M-MDS.

  (See CLEARING DTC [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].)

• Perform the DTC inspection for the SAS control module using the M-MDS.

  (See DTC INSPECTION [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].)

• Are the same DTCs present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the SAS control module.

  (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

No

DTC troubleshooting completed.