Sedan With 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 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 Sedan With Intelligent Key.
- If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to Sedan With Intelligent Key.






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 - Refer to Sedan With Intelligent Key.
NO - Inspection End.




Diagnosis Procedure
Regarding Wiring Diagram information, refer to NVIS - With Intelligent Key System.
1.CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch harness connector and IPDM E/R harness connector.





3. 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
1. Disconnect BCM harness connector.
2. Check continuity between push-button ignition switch harness connector M38 (A) terminal 4 and BCM harness connector M21 (B) terminal 140.





3. 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
1. Disconnect IPDM E/R harness connector.





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





3. 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 Intermittent Incident.
- Inspection End.