Nissan Frontier D22. Manual - part 442

DTC P0340 CMP SENSOR

EC-871

[VG33E]

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Specification data are reference values and are measured between each terminal and ground.

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 the ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

4

OR/B

ECM relay (Self shut-
off)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition switch 
OFF

0 - 1.5V

[Ignition switch: OFF]

●

A few seconds passed after turning ignition 
switch OFF

BATTERY VOLTAGE
(11 - 14V)

44

PU

Camshaft position sen-
sor (Reference signal)

[Engine is running]

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle

0.3 - 0.5V

[Engine is running]

●

Engine speed is 2,000 rpm

0.3 - 0.5V

49

LG

Camshaft position sen-
sor (Position signal)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at 
idle

Approximately 2.5V

[Engine is running]

●

Engine speed is 2,000 rpm

Approximately 2.5V

67

B/P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

72

B/P

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

117

B/P

Current return

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

SEF997U

SEF998U

SEF999U

SEF001V

EC-872

[VG33E]

DTC P0340 CMP SENSOR

Diagnostic Procedure

UBS00DJW

1. 

RETIGHTEN GROUND SCREWS

1.

Turn ignition switch OFF.

2.

Loosen and retighten engine ground screws.

>> GO TO 2.

2. 

CHECK CMP SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect camshaft position (CMP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between CMP sensor terminal 5 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness for open or short between camshaft position sensor and ECM relay

●

Harness for open or short between camshaft position sensor and ECM

>> Repair harness or connectors.

BBIA0418E

AEC647A

Voltage: Battery voltage

SEF708U

DTC P0340 CMP SENSOR

EC-873

[VG33E]

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4. 

CHECK CMP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between CMP sensor terminal 4 and ECM terminal 49, CMPS terminal 3 and
ECM terminals 44, 48. Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5

NG 

>> Repair open circuit or short to ground or short to power in harness or connectors.

5. 

CHECK CMPS GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check harness continuity between CMPS terminal 6 and engine 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.

●

Harness for open between camshaft position sensor and engine ground

>> Repair open circuit or short to power in harness or connector.

Continuity should exist.

Continuity should exist.

EC-874

[VG33E]

DTC P0340 CMP SENSOR

7. 

CHECK CAMSHAFT POSITION SENSOR

1.

Install any parts removed.

2.

Start engine.

3.

Check voltage between ECM terminals 44, 48 and ground, ECM
terminal 49 and ground with DC range.
<Terminal 44 or 48 and engine ground>

<Terminal 49 and engine ground>

OK or NG

OK

>> GO TO 8.

NG

>> Replace distributor assembly with camshaft position sensor.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>>  INSPECTION END.

Removal and Installation

UBS00DJX

DISTRIBUTOR

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

Condition

Idle

2,000 rpm

Voltage

0.3 - 0.5V

0.3 - 0.5V

Pulse sig-

nal

Condition

Idle

2,000 rpm

Voltage

Approximately 2.5V

Approximately 2.5V

Pulse sig-

nal

PBIB1424E

SEF997U

SEF998U

SEF999U

SEF001V