Nissan Altima L32. Instruction — part 1409
STR-32
< FUNCTION DIAGNOSIS >
[VQ35DE]
STARTING SYSTEM
FUNCTION DIAGNOSIS
STARTING SYSTEM
System Diagram
INFOID:0000000004205246
System Description
INFOID:0000000004205247
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.
AWBIA0742GB
STARTING SYSTEM
STR-33
< FUNCTION DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
STR
N
P
O
Component Description
INFOID:0000000004205248
Component part
Description
TCM (CVT models)
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.
Clutch interlock switch (M/T models)
The switch turns ON and electric power is supplied to the starter
relay and starter control relay inside IPDM E/R when the clutch
pedal is depressed.
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.
STR-34
< COMPONENT DIAGNOSIS >
[VQ35DE]
B TERMINAL CIRCUIT
COMPONENT DIAGNOSIS
B TERMINAL CIRCUIT
Description
INFOID:0000000004205249
The “B” terminal is constantly supplied with battery power.
Diagnosis Procedure
INFOID:0000000004205250
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. (CVT models)
Press and hold the clutch pedal fully with the control lever in neutral. (M/T models)
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. (CVT models)
Press and hold the clutch pedal fully with the control lever in neutral. (M/T models)
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 necessary.
.
NO
>> Check the starter motor case to engine mounting for
high resistance.
B - ground
Battery voltage
WKIA0137E
While cranking the engine
Terminal B - B+ terminal
Less than 0.5V
WKIA0138E
While cranking the engine
Starter case - B- terminal
Less than 0.2V
WKIA0139E
S CONNECTOR CIRCUIT
STR-35
< COMPONENT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
STR
N
P
O
S CONNECTOR CIRCUIT
Description
INFOID:0000000004205251
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 (CVT models) or the clutch pedal is fully depressed (M/T
models).
Diagnosis Procedure
INFOID:0000000004205252
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. (CVT models)
Press and hold the clutch pedal fully with the control lever in
neutral. (M/T models)
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 necessary. Refer to
.
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 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 connector F10 terminal 80.
Is there proper continuity between the two pins?
YES
>> Further inspection necessary. Refer to
NO
>> Repair the harness.
With ignition switch in START
S - ground
Battery voltage
ALBIA0503GB
S - 80
Continuity exists
ALBIA0504GB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст