Nissan Maxima Service and Repair Manual: B2601 shift position

Description

BCM confirms the shift position with the following 2 signals.

•  CVT selector lever

•  P position signal from IPDM E/R (CAN)

DTC Logic

DTC DETECTION LOGIC

NOTE:

• If DTC B2601 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to SEC-29, "DTC Logic".

• If DTC B2601 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to SEC-30, "DTC Logic".

• If DTC B2601 is displayed with DTC B2605, first perform the trouble diagnosis for DTC B2605. Refer to SEC-61, "DTC Logic".

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

1.  Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.

   • CVT selector lever is in the P position.

   • Do not depress the brake pedal.

2.  Check "Self diagnostic result" with CONSULT.

3.  Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.

   • CVT selector lever is in other than P position.

   • Do not depress the brake pedal.

4.  Check "Self diagnostic result" with CONSULT.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to SEC-147, "Wiring Diagram" or SEC-128, "Wiring Diagram".

1.CHECK CVT SHIFT SELECTOR POWER SUPPLY

1.  Turn ignition switch to ACC.

2.  Disconnect CVT shift selector harness connector.

3.  Check voltage between CVT shift selector harness connector M78 terminal 8 and ground.

2.CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT

1.  Disconnect BCM harness connector.

2.  Check continuity between BCM harness connector M19 (A) terminal 84 and CVT shift selector harness connector M78 (B) terminal 8.

3. Check continuity between BCM harness connector M19 (A) terminal 84 and ground.

3.CHECK CVT SHIFT SELECTOR CIRCUIT (BCM)

1.  Disconnect BCM harness connector and IPDM E/R harness connector.

2.  Check continuity between BCM harness connector M19 (A) terminal 87 and CVT shift selector harness connector M78 (B) terminal 9.

3. Check continuity between BCM harness connector M19 (A) terminal 87 and ground.

4.CHECK CVT SHIFT SELECTOR CIRCUIT (IPDM E/R)

1.  Disconnect IPDM E/R harness connector.

2.  Check continuity between CVT shift selector harness connector M78 (A) terminal 9 and IPDM E/R harness connector E17 (B) terminal 43.

3. Check continuity between CVT shift selector harness connector M78 (A) terminal 9 and ground.

5.CHECK CVT SHIFT SELECTOR

Refer to SEC-52, "Component Inspection".

6.CHECK INTERMITTENT INCIDENT

Refer to GI-41, "Intermittent Incident".

 Inspection End.

Component Inspection

1.CHECK CVT SHIFT SELECTOR

1.  Turn ignition switch OFF.

2.  Disconnect CVT shift selector harness connector.

3.  Check continuity between CVT shift selector terminals as follows.