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. Power Distribution System.
- If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. 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-III.
Is DTC detected?
YES - SEE Diagnosis Procedure.
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.