DTC B1884, B1890


id080200801600

DTC

B1884

Passenger air bag deactivation (PAD) indicator circuit open or short to body ground

B1890

Passenger air bag deactivation (PAD) indicator circuit short 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 PAD indicator circuit
POSSIBLE CAUSE
•  A/B 7.5 A fuse malfunction
•  Battery malfunction
•  Open circuit in wiring harness between battery and PAD indicator
•  PAD indicator malfunction
•  Open or short circuit in wiring harness between PAD indicator and SAS control module
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT OPERATION OF PAD INDICATOR
•  Turn the ignition switch to the ON position.
•  Does the PAD indicator illuminate?
Yes
Go to Step 6.
No
Go to the next step.
2
INSPECT FUSE
•  Remove the A/B 7.5 A fuse.
•  Is the fuse normal?
Yes
Install the fuse, then go to the next step.
No
Replace the fuse.
3
INSPECT BATTERY
•  Measure the battery positive voltage.
•  Is the voltage 9 V―16 V?
Yes
Go to the next step.
No
Battery is malfunctioning
Inspect the charge/discharge system.
4
INSPECT WIRING HARNESS BETWEEN BATTERY AND PAD INDICATOR
•  Turn the ignition switch to the ON position.
•  Remove the front scuff plate inner. (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.)
•  Remove the front side trim. (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)
•  Remove the console panel.(See CONSOLE PANEL REMOVAL/INSTALLATION.)
•  Remove the console. (See CONSOLE REMOVAL/INSTALLATION.)
•  Remove the bonnet release lever. (See BONNET LATCH AND RELEASE LEVER REMOVAL/INSTALLATION.)
•  Remove the lower panel. (See LOWER PANEL REMOVAL/INSTALLATION.)
•  Measure the information display terminal E voltage.
•  Is the voltage 9 V or more?
Yes
Go to the next step.
No
Repair the wiring harness between the battery and information display.
5
INSPECT PAD INDICATOR
•  Ground information display terminal I using a jumper wire.
•  Turn the ignition switch to the ON position.
•  Does the PAD indicator illuminate?
Yes
Go to the next step.
No
Replace the information display.
6
INSPECT WIRING HARNESS BETWEEN PAD INDICATOR AND SAS CONTROL MODULE
Warning
•  Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings before handling the air bag system components.
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the SAS control module connector.
•  Inspect the wiring harness between information display connector terminal I and SAS control module connector terminal 1U for the following:
―  Short to ground
―  Open circuit
―  Short circuit between terminals
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and information display.
•  Is the wiring harness normal?
Yes
Replace the SAS control module.
No
Replace the air bag wiring harness.
7
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PAD INDICATOR FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Measure the voltage of SAS control module connector terminal 1U.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and PAD indicator.
•  Is the voltage measured?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
8
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Reconnect the disconnected connectors.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Clear DTCs using the M-MDS.
•  Verify DTCs using the M-MDS.
•  Are DTCs B1884 and/or B1890 displayed.
Yes
Replace the SAS control module.
No
DTC troubleshooting completed.