Infiniti M45 (Y34). Manual — part 407
DTC P0340 CMP SENSOR (PHASE)
EC-317
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EC
DTC P0340 CMP SENSOR (PHASE)
PFP:23731
Component Description
ABS002JO
The camshaft position sensor (PHASE) senses the protrusion of
exhaust camshaft sprocket to identify a particular cylinder. The
crankshaft position sensor (POS) senses the piston position.
When the crankshaft position sensor (POS) system becomes inoper-
ative, the camshaft position sensor (PHASE) provides various con-
trols of engine parts instead, utilizing timing of cylinder identification
signals.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause
the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor changes.
On Board Diagnosis Logic
ABS002JP
DTC Confirmation Procedure
ABS002JR
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V with igni-
tion switch ON.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Crank engine for at least 2 seconds and run it for at least 5 sec-
onds at idle speed.
4.
If 1st trip DTC is detected, go to
EC-319, "Diagnostic Procedure"
.
If 1st trip DTC is not detected, go to next step.
5.
Maintain engine speed at more than 800 rpm for at least 5 sec-
onds.
6.
If 1st trip DTC is detected, go to
EC-319, "Diagnostic Procedure"
.
WITH GST
Follow the procedure WITH CONSULT-II above.
PBIB0562E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0340
0340
Camshaft position sensor
(PHASE) circuit
●
The cylinder No. signal is not sent to ECM
for the first few seconds during engine
cranking.
●
The cylinder No. signal is not sent to ECM
during engine running.
●
The cylinder No. signal is not in the normal
pattern during engine running.
●
Harness or connectors
(The sensor circuit is open or shorted)
●
Camshaft position sensor (PHASE)
●
Starter motor (Refer to
●
Starting system circuit (Refer to
.)
●
Dead (Weak) battery
SEF058Y
EC-318
DTC P0340 CMP SENSOR (PHASE)
Wiring Diagram
ABS002JS
TBWA0289E
DTC P0340 CMP SENSOR (PHASE)
EC-319
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A
EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
ABS002JT
1.
CHECK STARTING SYSTEM
Turn ignition switch to START position.
Yes or No
Yes
>> GO TO 2.
No
>> Check starting system. (Refer to
2.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws.
Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
84
L/W
Camshaft position sensor
(PHASE)
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
1.0 - 4.0V
[Engine is running]
●
Engine speed: 2,000 rpm.
1.0 - 4.0V
PBIB0056E
PBIB0057E
Does the engine turn over?
Does the starter motor operate?
PBIB1118E
EC-320
DTC P0340 CMP SENSOR (PHASE)
3.
CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1.
Disconnect camshaft position (CMP) sensor (PHASE) harness
connector.
2.
Turn ignition switch ON.
3.
Check voltage between CMP sensor (PHASE) terminal 3 and
ground with CONSULT-II or tester.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors F105, M135
●
Harness for open or short between ECM and camshaft position sensor (PHASE)
●
Harness for open or short between ECM relay and camshaft position sensor (PHASE)
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between CMP sensor (PHASE) terminal 1 and ground.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Joint connector-29
●
Harness for open or short between camshaft position sensor (PHASE) and ground
>> Repair open circuit or short to power in harness or connectors.
PBIB0023E
Voltage: Battery voltage
SEF481Y
Continuity should exist.
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