DTC B1427:29, B1427:4A, B1427:87, B1427:96 [SAS CONTROL MODULE (ACTIVE BONNET)]

id0802h4007100

System malfunction location	•  B1427:4A:Active bonnet sensor (left, left) ID mismatch •  B1427:87:Signal reception error from active bonnet sensor (left, left) •  B1427:29, B1427:96:Active bonnet sensor (left, left) 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 active bonnet sensor (left, left) and SAS control module has a malfunction •  Active bonnet sensor (left, left) has a malfunction
Fail-safe function	Not applicable
Possible cause	•  Active bonnet sensor (left, left) connector assembly incorrect •  Active bonnet sensor (left, left) connector malfunction •  Open circuit in the wiring harness between the active bonnet sensor (left, left) and SAS control module •  Driver or passenger-side pressure sensor malfunction •  SAS control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT ACTIVE BONNET SENSOR (LEFT, LEFT) Warning •  Handling the component parts improperly can accidentally operate (deploy) the air bag modules, pre-tensioner seat belts and active bonnet actuators which may seriously injure you. Read the service warnings/cautions and the workshop manual before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.) (See ACTIVE BONNET SERVICE WARNINGS.) (See ACTIVE BONNET SERVICE CAUTIONS.) •  Switch the ignition off. •  Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Remove the front bumper. (See DOOR TRIM REMOVAL/INSTALLATION.) •  Verify that the active bonnet sensor (left, left) is correctly installed. •  Is the active bonnet sensor (left, left) correctly installed?	Yes	Go to the next step.
		No	Correctly install the active bonnet sensor (left, left). Then go to the next step.
2	INSPECT ACTIVE BONNET SENSOR (LEFT, LEFT) CONNECTOR Warning •  Handling the component parts improperly can accidentally operate (deploy) the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings/cautions and the workshop manual before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.) (See ACTIVE BONNET SERVICE WARNINGS.) (See ACTIVE BONNET SERVICE CAUTIONS.) •  Switch the ignition off. •  Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Remove the front bumper. (See DOOR TRIM REMOVAL/INSTALLATION.) •  Disconnect the active bonnet sensor (left, left) connector. (See ACTIVE BONNET SENSOR REMOVAL/INSTALLATION.) •  Inspect the active bonnet sensor (left, left) connector. (Corrosion, damage, and disconnected pins) •  Is there any malfunction of the active bonnet sensor (left, left) connector?	Yes	Replace the malfunctioning part, then go to Step 4.
		No	Go to the next step.
3	INSPECT ACTIVE BONNET SENSOR (LEFT, LEFT) CIRCUIT FOR OPEN CIRCUIT •  Active bonnet sensor (left, left) and SAS control module connectors are disconnected. •  Inspect for continuity between the following terminals (wiring harness-side): ―  Active bonnet sensor (left, left) terminal A—SAS control module terminal 3O ―  Active bonnet sensor (left, left) terminal B—SAS control module terminal 3L Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and active bonnet sensor (left, left). •  Is there continuity?	Yes	Replace the active bonnet sennsor (left, left), then go to the next step. (See ACTIVE BONNET SENSOR REMOVAL/INSTALLATION.)
		No	Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and active bonnet sensor (left, left) terminal. If there is a common connector: •  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. •  Replace the malfunctioning part. If there is no common connector: •  Replace the wiring harness which has an open circuit. Go to the next step.
4	PERFORM SAS CONTROL MODULE DTC INSPECTION •  Switch the ignition off. •  Disconnect the negative battery cable and wait for 1 min or more. •  Connect the SAS control module connectors. •  Reconnect all disconnected connectors. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Switch the ignition ON (engine off or on). •  Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [SAS CONTROL MODULE (ACTIVE BONNET)].) •  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE (ACTIVE BONNET)].) •  Are the same DTCs present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
		No	DTC troubleshooting completed.