Nissan Maxima. Instruction — 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
.
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
.
POWER SUPPLY AND GROUND CIRCUIT
EC-157
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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EC
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POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000010094858
Regarding Wiring Diagram information, refer to
.
1.
CHECK GROUND CONNECTION-I
1. Turn ignition switch OFF.
2. Check ground connection E9. Refer to Ground Inspection in
.
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
8.
CHECK INTERMITTENT INCIDENT
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]
C
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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
GI-41, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
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
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