DTC 45

BME080201046217

DTC 45

Open circuit in wiring harness between SAS unit and occupancy sensor

DETECTION CONDITION

Warning
• Detection conditions are for understanding DTC outline before performing inspection. Performing inspection with only detection conditions may cause injury due to operating error or damage the system. When performing inspection, always follow inspection procedure.
• Malfunction in wiring harness between SAS unit and occupancy sensor

POSSIBLE CAUSE

• Occupancy sensor malfunction
• Open circuit in wiring harness between SAS unit and occupancy sensor
• Open circuit in wiring harness between occupancy sensor and ground
• Open circuit in wiring harness between METER 10 A fuse and occupancy sensor
• SAS unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
Note
• If occupancy sensor connector (3 terminals) is located on bottom of passenger's seat, vehicle has passenger-side air bag cut-off function.
• Is vehicle equipped with passenger-side air bag cut-off function?
Yes
Go to next step.
No

[Present malfunction diagnosis]

Replace SAS unit.

[Past malfunction diagnosis]

Troubleshooting completed.
2
INSPECT FOR CONTINUITY BETWEEN OCCUPANCY SENSOR AND SAS UNIT
Warning
• Handling air bag system components improperly can accidentally deploy air bag modules, and pre-tensioner seat belts which may seriously injure you. Read AIR BAG SYSTEM SERVICE WARNINGS before handling air bag system components. See SERVICE WARNINGS.
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait for more than 1 minute.
• Remove clock spring.
• Remove glove compartment.
• Disconnect passenger-side air bag module
connector.
• Disconnect driver and passenger-side side air bag module connectors. (Vehicle with side air bag)
• Remove B-pillar lower trim. (Vehicle with pre-tensioner seat belt)
• Disconnect driver and passerger-side pre-tensioner seat belt connector. (Vehicle with pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect all SAS unit connectors.
• Disconnect occupancy sensor connector.
• Is there continuity between terminal B of
occupancy sensor and terminal 3H of SAS?
Yes
Go to next step.
No
Replace wiring harness.
3
INSPECT FOR CONTINUITY BETWEEN OCCUPANCY SENSOR AND GROUND
• Is there continuity between terminal C of
occupancy sensor connector and ground?
Yes
Go to next step.
No
Replace wiring harness.
4
INSPECT FOR CONTINUITY BETWEEN METER 10 A FUSE AND OCCUPANCY SENSOR
• Connect negative battery cable.
• Measure voltage at terminal A of occupancy
sensor connector.
• Is voltage more than 9 V?
Yes

[Present malfunction diagnosis]

Turn ignition switch to LOCK position and disconnect negative battery cable. Then go to next step.

[Past malfunction diagnosis]

Troubleshooting completed.
No
Replace wiring harness.
5
VERIFY WHETHER MALFUNCTION IS IN OCCUPANCY SENSOR OR SAS UNIT
• Connect all SAS unit connectors.
• Connect clock spring connector.
• Connect passenger-side air bag module
connector.
• Connect passenger-side side bag sensor
connector. (Vehicle with side air bag)
• Connect driver and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
• Short terminal B of occupancy sensor connector to ground.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Is DTC 45 indicated?
Yes
Replace SAS unit.
No
Replace seat cushion.