DTC B108B:29 [Advanced Keyless Entry And Push Button Start System]

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. 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. 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.