DTC B1423:11/B1423:13/B1423:87 [ACTIVE BONNET]

id0802f1002800

DESCRIPTION	•  DTC B1423:11: Active bonnet sensor (right, center) circuit short to ground •  DTC B1423:13: Active bonnet sensor (right, center) circuit open circuit or short to power supply •  DTC B1423:87: No reception of active bonnet sensor (right, center) signal
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 diagnostic procedure. •  Malfunction in wiring harness between active bonnet sensor (right, center) and active bonnet control module
POSSIBLE CAUSE	•  Active bonnet sensor (right, center) connector malfunction •  Short to ground in wiring harness between active bonnet sensor (right, center) and active bonnet control module •  Open circuit in wiring harness between active bonnet sensor (right, center) and active bonnet control module •  Short to power supply in wiring harness between active bonnet (right, center) and active bonnet control module •  Active bonnet sensor (right, center) malfunction •  Active bonnet control module malfunction
SYSTEM WIRING DIAGRAM

Diagnostic Procedure

Step	Inspection		Action
1	ACTIVE BONNET SENSOR (RIGHT, CENTER) CONNECTOR INSPECTION Warning •  Handling the component parts improperly can accidentally operate the active bonnet actuator, which may seriously injure you. Read the service warnings and cautions before handling the component parts of the active bonnet. (See ACTIVE BONNET SERVICE WARNINGS.) (See ACTIVE BONNET SERVICE CAUTIONS.) •  Switch the ignition to LOCK. •  Disconnect the negative battery cable and wait 1 min or more. •  Remove the front bumper. (See FRONT BUMPER REMOVAL/INSTALLATION.) •  Disconnect the active bonnet sensor (right, center) connector. (See ACTIVE BONNET SENSOR REMOVAL/INSTALLATION.) •  Inspect the active bonnet sensor (right, center) connectors. (Corrosion, damage, and disconnected pins) •  Is there any malfunction in the active bonnet sensor (right, center) connectors?	Yes	Replace the malfunctioning part, then go to Step 5.
		No	Go to the next step.
2	INSPECT ACTIVE BONNET SENSOR (RIGHT, CENTER) CIRCUIT FOR SHORT TO GROUND •  Disconnect the active bonnet actuator (RH, LH) connector. •  Remove the bumper retainer from the front bumper. (See FRONT BUMPER DISASSEMBLY/ASSEMBLY.) •  Connect the active bonnet sensor wiring harness connector of the bumper retainer. •  Remove the partition board. (See PARTITION BOARD REMOVAL/INSTALLATION.) •  Remove the trunk side trim (RH). (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.) •  Disconnect all of the active bonnet control module connectors. (See ACTIVE BONNET CONTROL MODULE REMOVAL/INSTALLATION.) •  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground. ―  Active bonnet control module terminal 3M ―  Active bonnet control module terminal 3N Note •  Inspect for continuity while shaking the wiring harness between the active bonnet control module and the active bonnet sensor (right, center). •  Is there continuity?	Yes	Replace the wiring harness, then go to Step 5.
		No	Go to the next step.
3	INSPECT ACTIVE BONNET SENSOR (RIGHT, CENTER) CIRCUIT FOR OPEN CIRCUIT •  Verify that the active bonnet sensor (right, center) and active bonnet control module connectors are disconnected. •  Inspect the wiring harness between the following terminals (vehicle wiring harness side) for continuity. ―  Active bonnet sensor (right, center) terminal A and active bonnet control module terminal 3M ―  Active bonnet sensor (right, center) terminal B and active bonnet control module terminal 3N Note •  Inspect for continuity while shaking the wiring harness between the active bonnet control module and the active bonnet sensor (right, center). •  Is there continuity?	Yes	Go to the next step.
		No	Replace the wiring harness, then go to Step 5.
4	INSPECT ACTIVE BONNET SENSOR (RIGHT, CENTER) CIRCUIT FOR SHORT TO POWER SUPPLY •  Verify that the active bonnet sensor (right, center) and active bonnet control module connectors are disconnected. •  Connect the negative battery cable. •  Switch the ignition ON. •  Measure the voltage at the following terminals (vehicle wiring harness side). ―  Active bonnet control module terminal 3M ―  Active bonnet control module terminal 3N Note •  Measure the voltage while shaking the wiring harness between the active bonnet control module and the active bonnet sensor (right, center). •  Is the voltage 0 V?	Yes	Replace the active bonnet sensor (right, center), then go to the next step. (See ACTIVE BONNET SENSOR REMOVAL/INSTALLATION.)
		No	Replace the wiring harness, then go to the next step.
5	PERFORM DTC INSPECTION FOR ACTIVE BONNET CONTROL MODULE •  Switch the ignition to LOCK. •  Disconnect the negative battery cable and wait 1 min or more. •  Connect the active bonnet control module connector. •  Reconnect all the disconnected connectors. •  Connect the negative battery cable. •  Switch the ignition ON. •  Clear the DTC for the active bonnet control module using the M-MDS. (See CLEARING DTC [ACTIVE BONNET].) •  Perform the active bonnet control module DTC inspection using the M-MDS. (See DTC INSPECTION [ACTIVE BONNET].) •  Is the same DTC displayed?	Yes	Replace the active bonnet control module. (See ACTIVE BONNET CONTROL MODULE REMOVAL/INSTALLATION.)
		No	DTC troubleshooting completed.