Nissan Maxima. Manual - part 1056

B2560 STARTER CONTROL RELAY

SEC-49

< DTC/CIRCUIT DIAGNOSIS >

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B2560 STARTER CONTROL RELAY

Description

INFOID:0000000010051956

Starter control relay, integrated in IPDM E/R, permits the starter relay operation when in N or P position. It is

installed in parallel with the starter relay.

DTC Logic

INFOID:0000000010051957

DTC DETECTION LOGIC

NOTE:

• If DTC B2560 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-29, "DTC Logic"

.

• If DTC B2560 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-30, "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.

-

Depress the brake pedal.

2. Check “Self Diagnostic Result” with CONSULT.
Is DTC detected?

YES

>> Refer to 

SEC-49, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051958

1.

CHECK DTC WITH IPDM E/R

Check “Self Diagnostic Result” with CONSULT. Refer to 

PCS-27, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace malfunctioning parts.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> Inspection End.

DTC

Self-diagnosis name

DTC detecting condition

Possible causes

B2560

STARTER CONTROL 
RELAY

BCM detects a mismatch between the OFF re-
quest of starter control relay to IPDM E/R and the 
feedback. (The feedback is ON instead of OFF.)

• IPDM E/R

SEC-50

< DTC/CIRCUIT DIAGNOSIS >

B2601 SHIFT POSITION

B2601 SHIFT POSITION

Description

INFOID:0000000010051959

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

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

DTC Logic

INFOID:0000000010051960

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.
Is DTC detected?

YES

>> Refer to 

SEC-50, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051961

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.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2601

SHIFT POSITION

BCM detects when a difference between the shift 
P input signal and the shift position signal received 
from IPDM E/R via CAN communication continues 
for 2 seconds or more

• Harness or connectors

(CVT shift selector circuit is open or 
shorted.)

• CVT shift selector

B2601 SHIFT POSITION

SEC-51

< DTC/CIRCUIT DIAGNOSIS >

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3. Check voltage between CVT shift selector harness connector

M78 terminal 8 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT

1. Disconnect BCM harness connector.

2. Check continuity between BCM harness connector M19 (A) ter-

minal 84 and CVT shift selector harness connector M78 (B) ter-

minal 8.

3. Check continuity between BCM harness connector M19 (A) ter-

minal 84 and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> Repair harness or connector.

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) ter-

minal 87 and CVT shift selector harness connector M78 (B) ter-

minal 9.

3. Check continuity between BCM harness connector M19 (A) ter-

minal 87 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK CVT SHIFT SELECTOR CIRCUIT (IPDM E/R)

1. Disconnect IPDM E/R harness connector.

CVT shift selector (park position switch)

Ground

Voltage [V]

Connector

Terminal

M78

8

Ground

Battery voltage

ALKIA1349ZZ

BCM

CVT shift selector (park posi-

tion switch)

Continuity

Connector

Terminal

Connector

Terminal

A:  M19

84

B:  M78

8

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

84

Ground

No

ALKIA0445ZZ

BCM

CVT shift selector

(park position switch)

Continuity

Connector

Terminal

Connector

Terminal

A:  M19

87

B:  M78

9

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

87

Ground

No

ALKIA0446ZZ

SEC-52

< DTC/CIRCUIT DIAGNOSIS >

B2601 SHIFT POSITION

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.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK CVT SHIFT SELECTOR

Refer to 

SEC-52, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace CVT shift selector. Refer to 

TM-170, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000010051962

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 fol-

lows.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace CVT shift selector. Refer to 

TM-170, "Removal and Installation"

.

CVT shift selector

(park position switch)

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

A: M78

9

B: E17

43

Yes

CVT shift selector

(park position switch)

Ground

Continuity

Connector

Terminal

A: M78

9

Ground

No

ALKIA0447ZZ

CVT shift selector (park 

position switch)

Condition

Continuity

Terminal

8

9

CVT selector le-

ver

P position

No

Other than above

Yes

ALKIA0448ZZ