DTC B1871

id080200810100

DTC B1871
Passenger air bag deactivation (PAD) switch system circuit disabled
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 wiring harness between PAD switch and SAS control module
•  Malfunction in PAD switch circuit
POSSIBLE CAUSE
•  Open or short circuit in wiring harness between PAD switch and SAS control module
•  PAD switch circuit malfunction
•  SAS control module malfunction
•  PAD switch assembly incorrect

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PAD SWITCH
•  Using the M-MDS, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE.)
―  I_PAD_SW
•  Is the PAD switch normal?
Yes
Go to the next step.
No
Replace the PAD switch.
(See PASSENGER AIR BAG DEACTIVATION (PAD) SWITCH REMOVAL/INSTALLATION.)
2
INSPECT WIRING HARNESS BETWEEN PAD SWITCH AND SAS CONTROL MODULE
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the PAD switch connectors.
•  Remove the console. (See CONSOLE REMOVAL/INSTALLATION.)
•  Inspect the wiring harness between SAS control module terminal 1C and PAD switch terminal D, SAS control module terminal 1P and PAD switch terminal C for the following:
―  Short to ground
―  Open circuit
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the air bag wiring harness.
3
INSPECT PAD SWITCH
•  Disconnect the PAD switch connectors.
•  Is there continuity between terminal E of PAD switch connector and ground?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Replace the air bag wiring harness.