Nissan Frontier. Instruction — part 1192
STR-16
< SYSTEM DESCRIPTION >
STARTING SYSTEM
M/T WITHOUT CLUTCH INTERLOCK CANCEL SYSTEM : Component Description
INFOID:0000000009482295
Component part
Description
Clutch interlock switch
Clutch interlock switch supplies power to the coil side of the starter
relay when the clutch pedal is depressed to crank the engine.
BCM
BCM sends a starter request signal to the CPU of the IPDM E/R
over the CAN communication lines.
IPDM E/R
CPU inside IPDM E/R operates the starter relay at the request of
the BCM over the CAN communication lines.
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-17
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
A
STR
N
P
O
DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
Description
INFOID:0000000009482296
Terminal “B” is constantly supplied with battery power.
Diagnosis Procedure
INFOID:0000000009482297
Regarding Wiring Diagram information, refer to
STR-20, "Wiring Diagram - VQ40DE With Clutch Interlock
STR-26, "Wiring Diagram - VQ40DE Without Clutch Interlock Cancel System"
.
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 released.
1.
CHECK “B” TERMINAL CIRCUIT
1. Turn ignition switch OFF.
2. Check that starter motor B” terminal connection is clean and tight.
3. Check voltage between starter motor connector E210 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Check harness between battery and starter motor for open circuit.
2.
CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
1. Shift selector lever to P (Park) or N (Neutral) position.
2. Check voltage between battery positive terminal and starter motor B terminal.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check harness between the battery and starter motor for continuity.
3.
CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
1. Shift selector lever to P (Pack) or N (Neutral) position.
2. Check voltage between starter motor case and battery negative terminal.
Is the inspection result normal?
Terminals
Voltage
(Approx.)
(+)
(-)
Starter motor “B” terminal
Terminal
E210
2
Ground
Battery voltage
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Starter motor
“B“ terminal
Terminal
Battery positive terminal
E210
2
When the ignition switch is in START position
Less than 0.5V
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Starter motor case
Battery negative terminal
When the ignition switch is in
START position
Less than 0.2V
STR-18
< DTC/CIRCUIT DIAGNOSIS >
B TERMINAL CIRCUIT
YES
>> “B” terminal circuit is OK. Further inspection is necessary. Refer to
or
STR-10, "Work Flow (Without GR8-1200 NI)"
.
NO
>> Check the starter motor case to engine mounting for high resistance.
S CONNECTOR CIRCUIT
STR-19
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
A
STR
N
P
O
S CONNECTOR CIRCUIT
Description
INFOID:0000000009482298
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 (Park) or N (Neutral) position.
Diagnosis Procedure
INFOID:0000000009482299
Regarding Wiring Diagram information, refer to
STR-20, "Wiring Diagram - VQ40DE With Clutch Interlock
STR-26, "Wiring Diagram - VQ40DE Without Clutch Interlock Cancel System"
.
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.
3. Shift selector lever to “P” (Park) or “N” (Neutral) position.
4. Check voltage between starter motor harness connector E211 (QR25DE) or E207 (VQ40DE) and ground.
Is the inspection result normal?
YES
>> “S” circuit is OK. Further inspection is necessary. Refer to
STR-6, "Work Flow (With GR8-1200
STR-10, "Work Flow (Without GR8-1200 NI)"
.
NO
>> GO TO 2.
2.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect IPDM E/R connector.
2. Check continuity between starter motor harness connector E211 (QR25DE) or E207 (VQ40DE) and the
IPDM E/R harness connector E120.
Is the inspection result normal?
YES
>> Further inspection is necessary. Refer to
STR-6, "Work Flow (With GR8-1200 NI)"
"Work Flow (Without GR8-1200 NI)"
.
NO
>> Repair or replace the harness or connectors.
(+)
(-)
Condition
Voltage
(Approx.)
Connector Terminal
E211 (QR25DE)
1
Ground
When the ignition switch is in START position
Battery voltage
E207 (VQ40DE)
Starter motor harness connector
IPDM E/R harness connector
Continuity
Connector
Terminal
Connector
Terminal
E211 (QR25DE)
1
E120
19
Yes
E207 (VQ40DE)
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