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Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)

Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » B Code Charts » B261A » Security System » Sedan Without Intelligent Key

Sedan Without Intelligent Key

B261A PUSH-BUTTON IGNITION SWITCH

Description
IPDM E/R transmits the push-button ignition switch status via CAN communication to BCM. BCM receives push-button ignition switch status by hard wire input. BCM compares the 2 signals for mismatch.

DTC Logic

DTC DETECTION LOGIC

NOTE:

If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to See: U Code Charts\U1000\Security System\Sedan Without Intelligent Key.
If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to See: U Code Charts\U1010\Security System\Sedan Without Intelligent Key.

DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE

Press the push-button ignition switch under the following conditions and wait for at least 1 second.

CVT selector lever is in the P position
Do not depress brake pedal.

Check "Self diagnostic result" with CONSULT-III. Is DTC detected?

YES >> Refer to "Diagnosis Procedure".
NO >> Inspection End.

Diagnosis Procedure
1.CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1

Turn ignition switch OFF.
Disconnect push-button ignition switch harness connector and IPDM E/R harness connector.

Check voltage between push-button ignition switch harness connector and ground.

Is the Inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2.CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT

Disconnect BCM harness connector.

Check continuity between push-button ignition switch harness connector M38 (A) terminal 4 and BCM harness connector M19 (B) terminal 77.

Check continuity between push-button ignition switch harness connector M38 (A) terminal 4 and ground.

Is the Inspection result normal?
YES >> GO TO 3
NO >> Repair harness or connector.
3.CHECK PUSH-BUTTON IGNITION SWITCH

Disconnect IPDM E/R harness connector.

Check continuity between push-button ignition switch harness connector M38 (A) terminal 4 and IPDM E/R harness connector E18 (B) terminal 28.

Check continuity between push-button ignition switch harness connector and ground.

Is the Inspection result normal?
YES >> GO TO 4
NO >> Repair harness or connector.
4.CHECK INTERMITTENT INCIDENT
Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
>> Inspection End.