Nissan Maxima. Instruction — part 1131
STR-8
< SYSTEM DESCRIPTION >
[VQ35DE]
STARTING SYSTEM
SYSTEM DESCRIPTION
STARTING SYSTEM
System Diagram
INFOID:0000000009464999
System Description
INFOID:0000000009465000
The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The
starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.
Component Description
INFOID:0000000009465001
AWBIA0669GB
Component part
Description
TCM
TCM supplies power to the starter relay and starter control relay
inside IPDM E/R when the selector lever is shifted to the P or N
position.
BCM
BCM controls the starter relay inside IPDM E/R.
IPDM E/R
CPU inside IPDM E/R controls the starter control relay.
Starter motor
The starter motor plunger closes and the motor is supplied with
battery power, which in turn cranks the engine, when the “S” ter-
minal is supplied with electric power.
B TERMINAL CIRCUIT
STR-9
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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STR
N
P
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DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
Description
INFOID:0000000009465002
The “B” terminal is constantly supplied with battery power.
Diagnosis Procedure
INFOID:0000000009465003
Regarding Wiring Diagram information, refer to
.
CAUTION:
Perform diagnosis under the condition that the engine cannot start by the following procedure.
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is depleted.
1.
CHECK TERMINAL B POWER SUPPLY VOLTAGE
1. Turn ignition switch OFF.
2. Make sure that starter motor connector F27 terminal B connection is clean and tight.
3. Check voltage between starter motor connector F27 terminal B
and ground.
Is there battery voltage present?
YES
>> GO TO 2
NO
>> Check harness between battery and starter motor for
open circuit.
2.
CHECK BATTERY CABLE (VOLTAGE DROP TEST)
1. Shift CVT selector lever to “P” or “N” position.
2. Check voltage between battery positive terminal and starter
motor connector F27 terminal B while cranking the engine.
Is the voltage drop less than 0.5V?
YES
>> GO TO 3
NO
>> Check harness between the battery and the starter
motor for high resistance.
3.
CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
1. Shift CVT selector lever to “P” or “N” position.
B - ground
Battery voltage
WKIA0137E
While cranking the engine
Terminal B - B+ terminal
Less than 0.5V
WKIA0138E
STR-10
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
B TERMINAL CIRCUIT
2. Check voltage between starter motor case and battery negative
terminal while cranking the engine.
Is the voltage drop less than 0.2V?
YES
>> Terminal B circuit is OK. Further inspection is necessary.
Refer to
STR-2, "Work Flow (With GR8-1200 NI)"
STR-6, "Work Flow (Without GR8-1200 NI)"
.
NO
>> Check the starter motor case to engine mounting for
high resistance.
While cranking the engine
Starter case - B- terminal
Less than 0.2V
WKIA0139E
S CONNECTOR CIRCUIT
STR-11
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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STR
N
P
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S CONNECTOR CIRCUIT
Description
INFOID:0000000009465004
The starter motor magnetic switch is supplied with power when the ignition switch is turned to the START posi-
tion while the selector lever is in the P or N position.
Diagnosis Procedure
INFOID:0000000009465005
Regarding Wiring Diagram information, refer to
.
CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
1.
CHECK “S” CONNECTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect starter motor connector F28.
3. Shift CVT selector lever to “P” or “N” position.
4. Check voltage between starter motor harness connector F28
terminal S and ground with the ignition in START.
Is battery voltage present?
YES
>> “S” circuit is OK. Further inspection is necessary. Refer
to
STR-2, "Work Flow (With GR8-1200 NI)"
"Work Flow (Without GR8-1200 NI)"
.
NO
>> GO TO 2
2.
CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Check the following terminals and connectors for damage, bent pins and loose connections.
-
IPDM E/R harness connector F10
-
Starter motor harness connector F28
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair the terminal and connector.
3.
CHECK HARNESS CONTINUITY (OPEN/SHORT CIRCUIT)
1. Disconnect the following harness connectors.
-
IPDM E/R connector F10
-
Starter motor connector F28
2. Check continuity between starter motor harness connector F28 terminal S and IPDM E/R harness con-
nector F10 terminal 80.
3. Check continuity between starter motor harness connector F28 terminal S and ground.
Are the inspection results normal?
YES
>> Further inspection is necessary. Refer to
STR-2, "Work Flow (With GR8-1200 NI)"
"Work Flow (Without GR8-1200 NI)"
.
NO
>> Repair the harness.
With ignition switch in START
S - ground
Battery voltage
ALBIA0503GB
S - 80
Continuity exists
S - ground
Continuity does not exist
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