Nissan Maxima. Manual - part 418

EC-156

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

• Disconnection or cracks in EVAP purge hose, stuck open EVAP canister purge volume control solenoid

valve

• Malfunctioning seal in rocker cover gasket

• Disconnection, looseness, or cracks in hoses, such as a vacuum hose, connecting to intake air system parts

• Malfunctioning seal in intake air system, etc.

>> GO TO 30.

29.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”, AND “B/FUEL SCHDL”

Select “A/F ALPHA-B1”, “A/F ALPHA-B2”, and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and

check that each indication is within the SP value. 
Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

EC-581, "Symptom Table"

.

30.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and then check that the indication is within

the SP value.
Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

EC-581, "Symptom Table"

.

POWER SUPPLY AND GROUND CIRCUIT

EC-157

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000010094858

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

1.

CHECK GROUND CONNECTION-I

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-44, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I

1. Disconnect ECM harness connector.

2. Check the continuity between ECM harness connector and ground.

3. Also check harness for short to power.
is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E11, F2

• Harness for open or short between ECM and ground

>> Repair open circuit, short to power in harness or connectors.

4.

CHECK ECM POWER SUPPLY CIRCUIT-I

1. Reconnect ECM harness connector.

2. Turn ignition switch OFF and then ON.

3. Check the voltage between ECM harness connectors.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.

• IPDM E/R connector E18

• 10 A fuse (No. 35)

ECM

Ground

Continuity

Connector

Terminal

F14

12

Ground

Existed

16

E10

107

108

111

112

ECM

Voltage

Connector

+

–

Terminal

Terminal

E10

93

112

Battery voltage

JMBIA1875ZZ

EC-158

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

POWER SUPPLY AND GROUND CIRCUIT

• Harness for open or short between ECM and fuse

>> Repair open circuit, short to ground or short to power in harness or connectors.

6.

CHECK ECM POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Check the voltage between ECM harness connectors.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 9.

7.

CHECK ECM POWER SUPPLY CIRCUIT-III

1. Turn ignition switch ON.

2. Check the voltage between IPDM E/R harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace IPDM E/R. Refer to 

PCS-35

.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

9.

CHECK ECM POWER SUPPLY CIRCUIT-IV

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Check the voltage between ECM harness connectors.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 10.

10.

CHECK ECM POWER SUPPLY CIRCUIT-V

1. Disconnect ECM harness connector.

2. Disconnect IPDM E/R harness connector.

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

ECM

Voltage

Connector

+

–

Terminal

Terminal

E10

105

112

After turning ignition switch OFF, battery 
voltage will exist for a few seconds, then 
drop to approximately 0 V.

JMBIA1876ZZ

IPDM E/R

Ground

Voltage

Connector

Terminal

F10

49

Ground

Battery voltage

53

JMBIA1842ZZ

ECM

Voltage

+

–

Connector

Terminal

Connector

Terminal

F14

24

E10

112

Battery voltage

JMBIA1877ZZ

POWER SUPPLY AND GROUND CIRCUIT

EC-159

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

11.

CHECK 15 A FUSE

1. Disconnect 15 A fuse (No. 42) from IPDM E/R.

2. Check 15 A fuse.
Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace 15 A fuse.

12.

CHECK ECM POWER SUPPLY CIRCUIT-VI

1. Disconnect ECM harness connector.

2. Disconnect IPDM E/R harness connector.

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

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.

• Junction block connectors E44, E45

• Harness for open or short between ECM and IPDM E/R

>> Repair open circuit, short to ground or short to power in harness or connectors.

14.

CHECK INTERMITTENT INCIDENT

Refer to

GI-41, "Intermittent Incident"

 

GI-41

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-35

.

NO

>> Repair or replace harness or connectors.

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F14

24

F10

69

Existed

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

E10

105

E18

10

Existed