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DTC B1227:11, B1227:13, B1227:87 OR B1227:96 [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)]

DTC B1227:11, B1227:13, B1227:87 OR B1227:96 [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)]

 id0802g7002000

Note
•  The SRS air bag system can be identified by whether or not the seat track position sensor is present.
―  Standard deployment control system: Without seat track position sensor
―  Two-step deployment control system: With seat track position sensor

Outline

System malfunction location

B1227:11: Passenger-side pressure sensor circuit short to body ground

B1227:13: Passenger-side pressure sensor circuit open circuit or short to power supply

B1227:87: Signal reception error from passenger-side pressure sensor

B1227:96: Passenger-side pressure sensor internal malfunction
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.
•  Wiring harness between the passenger-side pressure sensor and SAS control module has a malfunction
•  Passenger-side pressure sensor has a malfunction
Fail-safe
•  Not applicable
Possible cause
•  Passenger-side pressure sensor connector malfunction
•  Open circuit in passenger-side pressure sensor signal circuit
•  Short circuit to ground in passenger-side pressure sensor signal circuit
•  Short circuit to power supply in passenger-side pressure sensor signal circuit
•  Passenger-side pressure sensor malfunction
•  SAS control module malfunction

Diagnostic Procedure

Step

Inspection

Results

Action
1
INSPECT PASSENGER-SIDE PRESSURE SENSOR CONNECTOR
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.
•  Switch the ignition off.
•  Disconnect the negative battery terminal and wait for 1 min or more.
•  Disconnect the passenger-side pressure sensor connector.
•  Inspect the passenger-side pressure sensor connector (both sides of connector). (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the passenger-side pressure sensor connector (wiring harness-side)?
Yes
Replace the malfunctioning part and perform the repair completion verification.
No
Go to the next step.
2
INSPECT PASSENGER-SIDE PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Disconnect the driver-side knee air bag module connector.
•  Disconnect the driver-side air bag module connectors.
•  Remove the clock spring.
•  Disconnect the passenger-side air bag module connector.
•  Disconnect the driver and passenger-side side air bag module connectors.
•  Disconnect the driver and passenger-side front seat connectors.
•  Disconnect the driver and passenger-side curtain air bag module connectors.
•  Disconnect the driver and passenger-side front pre-tensioner seat belt connectors.
•  Disconnect the driver and passenger-side rear pre-tensioner seat belt connectors.
•  Disconnect the all SAS control module connectors.
•  Inspect the passenger-side pressure sensor signal circuit for short to ground.
Note
•  Inspect for a short to ground while shaking the wiring harness between the SAS control module and passenger-side pressure sensor.
•  Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
3
INSPECT PASSENGER-SIDE PRESSURE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Passenger-side pressure sensor and SAS control module connectors are disconnected.
•  Inspect the passenger-side pressure sensor signal circuit for open circuit.
Note
•  Inspect for open circuit while shaking the wiring harness between the SAS control module and passenger-side pressure sensor.
•  Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
4
INSPECT PASSENGER-SIDE PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Passenger-side pressure sensor and SAS control module connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Inspect the passenger-side pressure sensor signal circuit for short to power supply.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side pressure sensor.
•  Is the circuit normal?
Yes
Replace the passenger-side pressure sensor and perform the repair completion verification.
(See PRESSURE SENSOR REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)
(See PRESSURE SENSOR REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)
No
Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Switch the ignition off.
•  Disconnect the negative battery terminal and wait for 1 min or more.
•  Connect the SAS control module connectors.
•  Reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Clear the DTC for the SAS control module using the M-MDS.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are the same Pending DTCs present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)
If the CAN communication is normal, perform the diagnosis from Step 1.
•  If the malfunction recurs, replace the SAS control module.
No
DTC troubleshooting completed.