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DTC B13D3:94 [BODY CONTROL MODULE (BCM)]

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Outline

System malfunction location	Communication error with remote transmitter
Detection condition	•  The LF control unit could not detect the remote transmitter communication or communication error was detected.
Fail-safe	Not applicable
Possible cause	•  Remote transmitter is in power-saving function •  When the ignition is switched ON (engine off or on), it is detected that the remote transmitter is outside of the vehicle. •  Keyless receiver malfunction •  Keyless antenna malfunction •  Push button start connector or terminal malfunction •  LF control unit connector or terminal malfunction •  Remote transmitter malfunction •  LF control unit malfunction •  Body control module (BCM) malfunction Note •  If any of the following items are touching or near the remote transmitter, signal communication between the remote transmitter and the vehicle is negatively affected, resulting in the engine not starting. ―  Spare keys ―  Keys for other vehicles equipped with an immobilizer system ―  Any metallic object ―  Any electronic device, or any credit or other card with magnetic strips ―  Radio wave outputting device nearby
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step	Inspection	Results	Action
1	VERIFY BODY CONTROL MODULE (BCM) DTCs AGAIN •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Go to the next step.
		No	Go to repair completion verification 2.
2	VERIFY BODY CONTROL MODULE (BCM) DTCs •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) •  Is a DTC related to a keyless receiver displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
		No	Go to the next step.
3	VERIFY BODY CONTROL MODULE (BCM) DTCs •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) •  Is a DTC related to a keyless antenna displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
		No	Go to the next step.
4	VERIFY IF PROBLEM IS DUE TO REMOTE TRANSMITTER POWER SAVING FUNCTION •  Turn off the power saving function. •  Is the same Pending DTC present?	Yes	Go to the next step.
		No	Go to repair completion verification 2.
5	VERIFY DTCs WITH REMOTE TRANSMITTER IN DIFFERENT LOCATIONS •  Perform the following procedure 3 times with the remote transmitter inside the cabin with certainty. 1.  Switch the ignition off. 2.  Switch the ignition ON (engine off or on). 3.  Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) 4.  Move the remote transmitter to a different location. •  Is the same Pending DTC present?	Yes	Go to the next step.
		No	Go to repair completion verification 2.
6	INSPECT PUSH BUTTON START CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Is the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT LF CONTROL UNIT CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	INSPECT REMOTE TRANSMITTER FOR MALFUNCTION DEPENDING ON REPEATABILITY •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Re-program key ID number of the remote transmitter. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [(E)].) •  Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) •  Is the same Pending DTC 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, replace the remote transmitter, then go to the next step. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [(E)].)
		No	Go to repair completion verification 2.
9	INSPECT LF CONTROL UNIT FOR MALFUNCTION •  Inspect the applicable part. (See LF CONTROL UNIT INSPECTION [(E)].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See LF CONTROL UNIT REMOVAL/INSTALLATION [(E)].)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) •  Is the same Pending DTC 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 body control module (BCM), then go to the next step. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTC IS DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.