SECURITY INDICATOR LIGHT: 11, DTC: B10D9:87/P1260:00 [IMMOBILIZER SYSTEM]

id0902e4908000

Description

Coil antenna (built into push button start) error

Detection condition

•  Start stop unit detected a malfunction in the coil antenna, and remote transmitter communication is not possible.

Fail-safe function

Not applicable

Possible cause

•  Push button start connector or terminal malfunction

•  Start stop unit connector or terminal malfunction

•  Short to ground in wiring harness between the following terminals:

―  Start stop unit terminal 1AC—Push button start terminal A

―  Start stop unit terminal 1AE—Push button start terminal B

•  Open circuit in wiring harness between the following terminals:

―  Start stop unit terminal 1AC—Push button start terminal A

―  Start stop unit terminal 1AE—Push button start terminal B

•  Coil antenna malfunction

•  Start stop unit malfunction

Description	Coil antenna (built into push button start) error
Detection condition	• Start stop unit detected a malfunction in the coil antenna, and remote transmitter communication is not possible.
Fail-safe function	Not applicable
Possible cause	• Push button start connector or terminal malfunction • Start stop unit connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ― Start stop unit terminal 1AC—Push button start terminal A ― Start stop unit terminal 1AE—Push button start terminal B • Open circuit in wiring harness between the following terminals: ― Start stop unit terminal 1AC—Push button start terminal A ― Start stop unit terminal 1AE—Push button start terminal B • Coil antenna malfunction • Start stop unit malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT PUSH BUTTON START CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the push button start connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
1		No	Repair or replace the connector, then go to Step 6.
2	INSPECT START STOP UNIT CONNECTOR CONDITION • Disconnect the start stop unit connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT FOR SHORT TO GROUND IN COIL ANTENNA CIRCUIT • Verify that the push button start and start stop unit connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Push button start terminal A ― Push button start terminal B • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Start stop unit terminal 1AC—Push button start terminal A • Start stop unit terminal 1AE—Push button start terminal B 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 a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to Step 6.
3		No	Go to the next step.
4	INSPECT FOR OPEN CIRCUIT IN COIL ANTENNA CIRCUIT • Verify that the push button start and start stop unit connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Start stop unit terminal 1AC—Push button start terminal A ― Start stop unit terminal 1AE—Push button start terminal B • Is there continuity?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Start stop unit terminal 1AC—Push button start terminal A • Start stop unit terminal 1AE—Push button start terminal B 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. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 6.
5	PERFORM DTC INSPECTION AND VERIFY COIL ANTENNA MALFUNCTION • Always reconnect all disconnected connectors. • Remove the ROOM 15 A fuse. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Clear the DTC for the immobilizer system using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM].) • Retrieve the immobilizer system DTCs using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM].) • Is the security indicator light: 11, DTC B10D9:87/P1260:00 displayed?	Yes	Replace the push button start, then go to the next step. (See PUSH BUTTON START REMOVAL/INSTALLATION.)
5		No	Go to Step 7.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Remove the ROOM 15 A fuse. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Clear the DTC for the immobilizer system using the M-MDS. (See CLEARING DTC [IMMOBILIZER SYSTEM].) • Retrieve the immobilizer system DTCs using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM].) • Is the security indicator light: 11, DTC B10D9:87/P1260:00 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the start stop unit. (See START STOP UNIT REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [IMMOBILIZER SYSTEM].)
7		No	DTC troubleshooting completed.