Nissan Sentra. Instruction — part 437
EC-444
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
SENSOR POWER SUPPLY 2 CIRCUIT
SENSOR POWER SUPPLY 2 CIRCUIT
Description
INFOID:0000000009758701
ECM supplies a voltage of 5.0 V to some of the sensors systematically divided into 2 groups, respectively.
Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously
in the sensors belonging to the same group as the shorted-circuit sensor.
Sensor power supply 1
• Battery current sensor
• Crankshaft position (CKP) sensor (POS)
• Throttle position (TP) sensor
• Accelerator pedal position (APP) sensor 1
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.
Sensor power supply 2
• Camshaft position (CMP) sensor (PHASE)
• Mass air flow (MAF) sensor
• Engine oil pressure (EOP) sensor
• Exhaust valve timing (EVT) control position sensor
• Accelerator pedal position (APP) sensor 2
• Intake manifold runner control valve position sensor
Diagnosis Procedure
INFOID:0000000009758702
1.
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-1
1. Turn ignition switch OFF.
2. Disconnect accelerator pedal position (APP) sensor harness connector.
3. Turn ignition switch ON.
4. Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 2.
2.
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-2
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check the continuity between APP sensor harness connector and ECM.
CVT models
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
+
−
Voltage
(Approx.)
APP sensor
Connector
Terminal
E12
5
Ground
5.0 V
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
E12
5
E16
118
Existed
SENSOR POWER SUPPLY 2 CIRCUIT
EC-445
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK COMPONENTS
Check the following.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning component.
5.
CHECK APP SENSOR
Check APP sensor. Refer to
EC-436, "Component Inspection (APP Sensor)"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
NO
>> Replace accelerator pedal assembly. Refer to
ACC-3, "Removal and Installation"
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F24
32
CMP sensor (PHASE)
F39
1
40
EOP sensor
F2
1
44
EVT control position sensor
F57
1
F25
36
MAF sensor
F31
1
Sensor
Reference
CMP sensor (PHASE)
EC-282, "Component Inspection
[CMP Sensor (PHASE)]"
MAF sensor
EC-188, "Component Inspection
(MAF Sensor)"
EOP sensor
EC-342, "Component Inspection
(EOP Sensor)"
EVT control position sensor
EC-360, "Component Inspection
(EVT Control Position Sensor)"
EC-446
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
BRAKE PEDAL POSITION SWITCH
BRAKE PEDAL POSITION SWITCH
Component Function Check
INFOID:0000000009758703
1.
CHECK BRAKE PEDAL POSITION SWITCH FUNCTION
With CONSULT
1. Turn ignition switch ON.
2. Select “ENGINE” using CONSULT.
3. Select “BRAKE SW1” in “DATA MONITOR” mode.
4. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009758704
1.
CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect brake pedal position switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between brake pedal position switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Pull out #5 fuse.
2. Check that the fuse is not fusing.
3. Check the continuity between stop lamp switch harness connector and fuse terminal.
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage
(Approx.)
Connector
+
–
Terminal
Terminal
E16
116
127
Brake pedal
Slightly depressed
0 V
Fully released
Battery voltage
+
−
Voltage
Brake pedal position switch
Connector
Terminal
E36
1
Ground
Battery voltage
BRAKE PEDAL POSITION SWITCH
EC-447
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Check power supply circuit for 12V battery power supply.
NO
>> Repair or replace error-detected parts.
3.
CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between brake pedal position switch harness connector and ECM harness connec-
tor.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK BRAKE PEDAL POSITION SWITCH
Check brake pedal position switch. Refer to
EC-447, "Component Inspection (Brake Pedal Position Switch)"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
NO
>> Replace brake pedal position switch. Refer to
Component Inspection (Brake Pedal Position Switch)
INFOID:0000000009758705
1.
CHECK BRAKE PEDAL POSITION SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect brake pedal position switch harness connector.
3. Check the continuity between brake pedal position switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK BRAKE PEDAL POSITION SWITCH-II
1. Adjust brake pedal position switch installation. Refer to
2. Check the continuity between brake pedal position switch terminals under the following conditions.
+
−
Continuity
Brake pedal position switch
Connector
Terminal
E36
1
#5 fuse ter-
minal
Existed
+
−
Continuity
Brake pedal position switch
ECM
Connector
Terminal
Connector
Terminal
E36
2
E16
116
Existed
Brake pedal position switch
Condition
Continuity
+
−
Terminals
1
2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
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