B261A

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 hardwire 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
Power Distribution System.
- If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
Power Distribution System.






DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

1.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.
2.Check "Self diagnostic result" with CONSULT.
Is DTC detected?
YES- .
NO- Inspection End.


Diagnosis Procedure

Regarding Wiring Diagram information, Power Distribution System.

1. CHECK PUSH-BUTTON IGNITION SWITCH OPERATION

Press push-button ignition switch and check if it turns to ON.
Does ignition switch turn to ON?
YES- GO TO 2
NO- GO TO 4

2. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)






1.Turn ignition switch OFF.
2.Disconnect push-button ignition switch.
3.Check voltage between IPDM E/R harness connector and ground.





Is the inspection result normal?
YES- GO TO 3
NO- Replace IPDM E/R. Service and Repair.

3. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)






1.Disconnect IPDM E/R and BCM.
2.Check continuity between IPDM E/R harness connector (A) and push-button ignition switch harness connector (B).










3.Check continuity between IPDM E/R harness connector and ground.





Is the inspection result normal?
YES- GO TO 6
NO- Repair or replace harness.

4. CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

1.Disconnect push-button ignition switch.
2.Check voltage between BCM harness connector and ground.





Is the inspection result normal?
YES- GO TO 5
NO- Replace BCM. Service and Repair.

5. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

1.Disconnect BCM and IPDM E/R.
2.Check continuity between BCM harness connector and push-button ignition switch harness connector.





3.Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES- GO TO 6
NO- Repair or replace harness.

6. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- Inspection End.