DTC 3

BME080201046W05

DTC 3

Power supply of SAS unit

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.
• Voltage detected at SAS unit terminals 2E and 2H is 9 V or less.

POSSIBLE CAUSE

Note
• DTC 3 is indicated when voltages in both of following wiring harnesses drop simultaneously.
- Wiring harness between fuse block connector (JB-09) terminal B and SAS unit connector terminal 2E
- Wiring harness between fuse block connector (JB-08) terminal P and SAS unit connector terminal 2H
• Weak battery
• Malfunction in wiring harness between battery and SAS unit
• SAS unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT BATTERY
• Measure voltage of battery.
• Is voltage more than 9 V?
Yes
Go to next step.
No
Battery is weak.
Inspect charge/discharge system.
2
INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK
• Remove driver-side front scuff plate.
• Remove driver-side front side trim.
• Remove fuse block without disconnecting connectors.
• Turn ignition switch to ON position.
• Measure voltage at terminals B (JB-09) and P (JB-08) of fuse block connectors.
• Is voltage of at least either terminal more than 9 V?
Yes
Go to next step.
No
Repair wiring harnesses.
3
INSPECT WIRING HARNESS BETWEEN FUSE BLOCK 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. (Vehicles with side air bag)
• Disconnect driver and passenger-side pre-tensioner seat belt connectors.(Vehicle with pre-tensioner seat belt)
• Remove B-pillar lower trims.(Vehicle with pre-tensioner seat belt.)
• Disconnect driver and passenger-side pre-tensioner seat belt connectors.(Vehicle with pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect all SAS unit connectors.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Measure voltage at SAS unit connector terminals 2E and 2H.
• Is voltage of at least either terminal more than 9 V?
Yes
Present malfunction diagnosis:
• Replace SAS unit.
Past malfunction diagnosis:
• Troubleshooting completed.
No
Replace wiring harnesses.