Infiniti G37 Coupe. Manual — part 542
P0555 BRAKE BOOSTER PRESSURE SENSOR
EC-349
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0555 BRAKE BOOSTER PRESSURE SENSOR
Description
INFOID:0000000001736749
Brake booster pressure sensor is connected to brake booster by a
hose. It detects brake booster pressure and sends the voltage signal
to the ECM. The sensor uses a silicon diaphragm which is sensitive
to the change in pressure. As the pressure increases, the voltage
rises.
DTC Logic
INFOID:0000000001736751
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 10 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001736752
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
JMBIA0878ZZ
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0555
Brake booster pressure sensor
circuit
• An excessively low voltage from the
sensor is sent to ECM.
• An excessively high voltage from the
sensor is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
[CKP sensor (POS) circuit is shorted.]
(APP sensor 2 circuit is shorted)
(EVAP control system pressure sensor
circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• Brake booster pressure sensor
• Crankshaft position sensor (POS)
• Accelerator pedal position sensor
• EVAP control system pressure sensor
• Refrigerant pressure sensor
EC-350
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P0555 BRAKE BOOSTER PRESSURE SENSOR
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK BRAKE BOOSTER PRESSURE SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect brake booster pressure sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between brake booster pressure sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 3.
3.
CHECK BRAKE BOOSTER PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between Brake booster pressure sensor harness connector and ECM harness con-
nector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness for open between ECM and brake booster pressure sensor
>> Repair open circuit.
5.
CHECK BRAKE BOOSTER PRESSURE SENSOR POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair short to ground or short to power in harness or connectors.
6.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to
EC-267, "Component Inspection"
• EVAP control system pressure sensor (Refer to
EC-306, "Component Inspection"
.)
Brake booster pressure sensor
Ground
Voltage
Connector
Terminal
E48
1
Ground
Approx. 5V
Brake booster pres-
sure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E48
1
F101
45
Existed
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F101
45
Brake booster pressure sensor
E48
1
46
CKP sensor (POS)
F2
1
M107
103
APP sensor
E112
6
107
EVAP control system pressure sensor
B30
3
111
Refrigerant pressure sensor
E77
3
P0555 BRAKE BOOSTER PRESSURE SENSOR
EC-351
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
• Refrigerant pressure sensor (Refer to
HAC-85, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace malfunctioning component.
7.
CHECK APP SENSOR
EC-460, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> GO TO 8.
8.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly
2.
Go to
EC-460, "Special Repair Requirement"
.
>> INSPECTION END
9.
CHECK BRAKE BOOSTER PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between brake booster pressure sensor harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness for open or short between brake booster pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11.
CHECK BRAKE BOOSTER PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between brake booster pressure sensor harness connector and ECM harness con-
nector.
2.
Also check harness for short to ground and power.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness for open or short between brake booster pressure sensor and ECM
Brake booster pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E48
3
F101
36
Existed
Brake booster pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E48
2
F101
39
Existed
EC-352
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P0555 BRAKE BOOSTER PRESSURE SENSOR
>> Repair open circuit or short to ground or short to power in harness or connectors.
13.
CHECK BRAKE BOOSTER PRESSURE SENSOR
EC-352, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Replace brake booster pressure sensor.
14.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000001736753
1.
CHECK BRAKE BOOSTER PRESSURE SENSOR-I
1.
Turn ignition switch OFF.
2.
Start engine and warm it up to normal operating temperature.
3.
Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
4.
Check the voltage between ECM harness connector terminals as follows.
NOTE:
• To avoid the influence of intake manifold vacuum, check the voltage 1 or more minutes past after engine
is stopped.
• Because the sensor is absolute pressure sensor, output value may differ depends on atmospheric pres-
sure and altitude.
5.
Measure the atmospheric pressure.
NOTE:
As the atmospheric pressure described on the synoptic chart is the value at sea level, compensate the
pressure with the following chart.
6.
Check the manifold absolute pressure sensor value corresponding to the atmospheric pressure.
ECM
Connector
+
–
Terminal
Terminal
F101
39
36
Altitude
Compensated pressure
0m
0hPa
200m
-24hPa
400m
-47hPa
600m
-70hPa
800m
-92hPa
1000m
-114hPa
1500m
-168hPa
2000m
-218hPa
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст