DTC B108B:29 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c398900

DESCRIPTION

Mismatch state of push button start 1 and 2

DETECTION CONDITION

•  A combination of the push button start 1 and 2 signals is abnormal.

POSSIBLE CAUSE

•  Push button start connector or terminals malfunction

•  Keyless control module connector or terminals malfunction

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

―  Push button start terminal A—Keyless control module terminal 2B

―  Push button start terminal B—Keyless control module terminal 3Q

•  Short to power supply in wiring harness between the following terminals:

―  Push button start terminal A—Keyless control module terminal 2B

―  Push button start terminal B—Keyless control module terminal 3Q

•  Open circuit in wiring harness between the following terminals:

―  Push button start terminal A—Keyless control module terminal 2B

―  Push button start terminal B—Keyless control module terminal 3Q

•  Push button start malfunction

•  Keyless control module malfunction

DESCRIPTION	Mismatch state of push button start 1 and 2
DETECTION CONDITION	• A combination of the push button start 1 and 2 signals is abnormal.
POSSIBLE CAUSE	• Push button start connector or terminals malfunction • Keyless control module connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Push button start terminal A—Keyless control module terminal 2B ― Push button start terminal B—Keyless control module terminal 3Q • Short to power supply in wiring harness between the following terminals: ― Push button start terminal A—Keyless control module terminal 2B ― Push button start terminal B—Keyless control module terminal 3Q • Open circuit in wiring harness between the following terminals: ― Push button start terminal A—Keyless control module terminal 2B ― Push button start terminal B—Keyless control module terminal 3Q • Push button start malfunction • Keyless control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT PUSH BUTTON START CONNECTOR AND TERMINALS • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the push button start connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 7.
1		No	Go to the next step.
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS • Disconnect the keyless control module connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 7.
2		No	Go to the next step.
3	INSPECT PUSH BUTTON START CIRCUIT FOR SHORT TO GROUND • Push button start and keyless control module 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	Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
3		No	Go to the next step.
4	INSPECT PUSH BUTTON START CIRCUIT FOR SHORT TO POWER SUPPLY • Push button start and keyless control module connectors are disconnected. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) • Switch the ignition to ON. • Measure the voltage at the following terminals (wiring harness-side): ― Push button start terminal A ― Push button start terminal B • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
4		No	Go to the next step.
5	INSPECT PUSH BUTTON START CIRCUIT FOR OPEN CIRCUIT • Push button start and keyless control module connectors are disconnected. • Switch the ignition to off. • Disconnect the negative battery cable. • Inspect for continuity between the following terminals (wiring harness-side): ― Push button start terminal A—Keyless control module terminal 2B ― Push button start terminal B—Keyless control module terminal 3Q • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
6	INSPECT PUSH BUTTON START • Inspect the push button start. (See PUSH BUTTON START INSPECTION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Is there any malfunction?	Yes	Replace the push button start, then go to the next step. (See PUSH BUTTON START REMOVAL/INSTALLATION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
6		No	Go to the next step.
7	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect the disconnected connectors. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) • Operate the advanced key to activate the keyless control module. • Clear the DTC from the keyless control module using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Operate the advanced key to activate the keyless control module. • Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].) • Is the same DTC present?	Yes	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
8		No	DTC troubleshooting completed.