System malfunction location

• Seat weight sensor control module circuit open to power supply

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.

• Malfunction in seat weight sensor control module circuit.

Fail-safe

Not applicable

Possible cause

• SRS2/ESCL 15A fuse malfunction

• Seat weight sensor control module connector malfunction

• Short circuit to power supply or body ground in the wiring harness between fuse block and seat weight sensor control module

• Open circuit in the wiring harness between fuse block and seat weight sensor control module

• Seat weight sensor control module malfunction

Step

Inspection

Action

1

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Remove the SRS2/ESCL 15A fuse.

• Is the fuse normal?

Yes

Install the fuse, then go to the next step.

No

Replace the fuse.

2

WARNING:

• Handling the component parts improperly can accidentally operate (deploy) the air bag module, 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].)

• Disconnect the seat weight sensor control module connector.

• Is there any malfunction of the seat weight sensor control module connector?

Yes

Replace the malfunctioning part, then go to Step 6.

No

Replace the wiring harness.

3

• Seat weight sensor control module and fuse block connectors are disconnected.

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

• Seat weight sensor control module terminal 2A

NOTE:

• Inspect for continuity while shaking the wiring harness between the seat weight sensor control module and fuse block.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between seat weight sensor control module terminal and fuse block 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 6.

No

Go to the next step.

4

• Seat weight sensor control module and fuse block connectors are disconnected.

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

• Seat weight sensor control module terminal 2A—fuse block terminal

NOTE:

• Inspect for continuity while shaking the wiring harness between the seat weight sensor control module and fuse block.

• 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 seat weight sensor control module terminal and fuse block 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 6.

5

• Seat weight sensor control module and SAS control module connectors are disconnected.

• Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Measure the voltage at the following terminals (wiring harness-side):

• Seat weight sensor control module terminal 2A

NOTE:

• Measure the voltage while shaking the wiring harness between the seat weight sensor control module and fuse block.

• 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 seat weight sensor control module terminal and fuse block 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 the next step.

6

• Reconnect the disconnected connectors.

• Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

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

• Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Is the same DTC present?

Yes

Replace the seat weight sensor control module. (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

No

DTC troubleshooting completed.