System malfunction location

• Occupant classification sensor internal signal output unstable

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.

• Occupant classification sensor internal malfunction

• Occupant classification sensor calibration setting has not been done correctly

Fail-safe

—

Possible cause

• Occupant classification sensor malfunction

• SAS control module malfunction

• Seat cushion is damp

• Malfunction in the power supply circuit of the occupant classification sensor

• Malfunction in the body ground circuit of the occupant classification sensor

• Passenger’s seat electric parts malfunction

• Malfunction in the power supply circuit of the passenger’s seat electric parts

• Malfunction in the body ground circuit of the passenger’s seat electric parts

Step

Inspection

Action

1

• Inspect the seat cushion.

• Is the seat cushion damp?

Yes

Dry the seat cushion, then go to next step.

No

Go to the next step.

2

• Inspect the battery terminals for looseness.

• Inspect the battery.

  (See BATTERY INSPECTION.)

• Is there any malfunction?

Yes

Connect the battery terminals securely, and recharge or replace the battery.

(See BATTERY RECHARGING.)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Then go to the next step.

No

Go to the next step.

3

• Perform the occupant classification sensor calibration.

  (See OCCUPANT CLASSIFICATION SENSOR CALIBRATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Clear DTCs using the M-MDS.

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

• Verify DTCs using the M-MDS.

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

• Is DTC B00A0:09 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

4

• Switch the ignition off.

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

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the occupant classification sensor connector.

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

• Inspect the occupant classification sensor connector. (Corrosion, damage, and disconnected pins).

• Is there any malfunction of the occupant classification sensor connector?

Yes

Repair or replace the malfunctioning part, then go to Step 17.

No

Go to the next step.

5

• Occupant classification sensor connector is disconnected.

• Inspect for continuity between the following terminal and body ground.

• Passenger-side front seat connector (short cord-side) terminal 2A

NOTE:

• Inspect for continuity while shaking the wiring harness between the passenger-side front seat connector and body ground.

• 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 passenger-side front seat connector terminal and body ground.

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 17.

6

• Occupant classification sensor connector is disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

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

• Measure the voltage at the following terminal:

• Passenger-side front seat connector (short cord-side) terminal 2A

NOTE:

• Measure the voltage while shaking the wiring harness between the passenger-side front seat connector and body ground.

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between passenger-side front seat connector terminal and body ground.

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 a short to power supply.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has a short to power supply.

Go to Step 17.

7

• Occupant classification sensor connector is disconnected.

• Measure the voltage at the following terminal:

• Passenger-side front seat connector (short cord-side) terminal 2B

NOTE:

• Measure the voltage while shaking the wiring harness between the passenger-side front seat connector and IG1 relay.

• Is the voltage B+?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between passenger-side front seat connector terminal and IG1 relay.

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.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness.

Go to Step 17.

8

• Inspect the passenger-side buckle switch operation.

• Does the passenger-side buckle switch operate normally?

Yes

Go to Step 15.

No

Go to the next step.

9

• Switch the ignition off.

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

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Inspect the passenger-side buckle switch.

  (See BUCKLE SWITCH INSPECTION.)

• Is the passenger-side buckle switch normal?

Yes

Go to the next step.

No

Replace the passenger-side buckle switch.

(See BUCKLE REMOVAL/INSTALLATION.)

Then go to Step 17.

10

• Passenger-side buckle switch connector is disconnected.

• Inspect for continuity between the following terminal and body ground:

• Passenger-side front seat connector (short cord-side) terminal 5A

NOTE:

• Inspect for continuity while shaking the wiring harness between the passenger-side front seat connector and body ground.

• 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 passenger-side front seat connector terminal and body ground.

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 17.

11

• Passenger-side buckle switch connector is disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

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

• Measure the voltage at the following terminal:

• Passenger-side front seat connector (short cord-side) terminal 5A

NOTE:

• Measure the voltage while shaking the wiring harness between the passenger-side front seat connector and body ground.

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between passenger-side front seat connector terminal and body ground.

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 a short to power supply.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has a short to power supply.

Go to Step 17.

12

• Passenger-side buckle switch connector is disconnected.

• Switch the ignition off.

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

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.)

• Disconnect the clock spring connectors. (See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Remove the passenger-side lower panel. (See PASSENGER-SIDE LOWER PANEL REMOVAL/INSTALLATION.)

• Disconnect the passenger-side air bag module connectors. (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Disconnect the driver and passenger-side side air bag module connectors. (See SIDE AIR BAG MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Remove the back trim. (See BACK TRIM REMOVAL/INSTALLATION.)

• Disconnect the driver and passenger-side pre-tensioner seat belt connectors.

• Disconnect the driver and passenger-side lap pre-tensioner seat belt connectors.

  (See SEAT BELT REMOVAL/INSTALLATION.)

• Disconnect the all SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Inspect for continuity between the following terminals and body ground:

• Passenger-side front seat connector (short cord-side) terminal 5B

NOTE:

• Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side front seat connector.

• 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 passenger-side front seat connector terminal and SAS control module 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 a short to ground.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has a short to ground.

Go to Step 17.

13

• Passenger-side buckle switch and SAS control module connectors are disconnected.

• Inspect for continuity between the following terminal:

• Passenger-side front seat connector (short cord-side) terminal 5B—SAS control module terminal 2W

NOTE:

• Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side front seat connector.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between passenger-side front seat connector terminal and SAS control module 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 17.

No

Go to the next step.

14

• Passenger-side buckle switch and SAS control module connectors are disconnected.

• Measure the voltage at the following terminal:

• Passenger-side front seat connector (short cord-side) terminal 5B

NOTE:

• Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side front seat connector.

• Is the voltage 0 V?

Yes

Repair the passenger-side buckle switch connector. (Corrosion, damage, and disconnected pins)

Go to Step 17.

No

Refer to the wiring diagram and verify whether or not there is a common connector between passenger-side front seat connector terminal and SAS control module 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 a short to power supply.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has a short to power supply.

Go to Step 17.

15

• Inspect the passenger-side seat warmer operation.

• Does the passenger-side seat warmer operate normally?

Yes

Go to the next step.

No

• Inspect the passenger-side seat warmer unit connector. (Corrosion, damage, and disconnected pins)

• Inspect the passenger-side seat warmer unit.

  (See SEAT WARMER UNIT INSPECTION.)

• Refer to the wiring diagram and inspect the passenger-side seat warmer units body ground circuit.

• Refer to the wiring diagram and inspect the wiring harness between the seat warmer control unit and passenger-side seat warmer unit.

Repair or replace the malfunctioning part, then go to Step 17.

16

• Inspect the passenger-side headrest speaker operation.

• Does the passenger-side headrest speaker operate normally?

Yes

Go to the next step.

No

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

• Inspect the passenger-side headrest speaker.

  (See HEADREST SPEAKER INSPECTION.)

• Refer to the wiring diagram and inspect the passenger-side headrest speaker circuit.

Repair or replace the malfunctioning part, then go to the next step.

17

• Perform the occupant classification sensor calibration.

  (See OCCUPANT CLASSIFICATION SENSOR CALIBRATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Clear DTCs using the M-MDS.

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

• Verify DTCs using the M-MDS.

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

• Is DTC B00A0:09 displayed?

Yes

Replace the occupant classification sensor.

(See SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

Then go to the next step.

No

DTC troubleshooting completed.

18

• 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)].)

• Is the same DTC present?

Yes

Replace the SAS control module.

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

No

DTC troubleshooting completed.