Nissan Primera P11. Instruction — part 191

2

CHECK POWER SUPPLY

1. Stop engine.
2. Disconnect injector harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between terminal 2 and ground with CONSULT-II or tester.

SEF986W

Voltage: Battery voltage

OK or NG

OK

©

GO TO 4.

NG

©

GO TO 3.

3

DETECT MALFUNCTIONING PART

Check the following.

I

10A fuse

I

Harness connectors M50, F104

I

Harness for open or short between injector and fuse

©

Repair harness or connectors.

4

CHECK OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector harness connector terminal 1 and ECM terminals 101, 103, 105, 107.

Refer to wiring diagram.

Continuity should exist.

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

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 5.

5

DETECT MALFUNCTIONING PART

Check the harness for open or short between ECM and injector.

©

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

INJECTOR

QG16

I

18DE

Diagnostic Procedure (Cont’d)

EC-321

6

CHECK INJECTOR

Refer to “Component Inspection”, EC-QG-322.

OK or NG

OK

©

GO TO 7.

NG

©

Replace injector.

7

CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-QG-102.

©

INSPECTION END

Component Inspection

NCEC0439

INJECTOR

NCEC0439S01

1.

Disconnect injector harness connector.

2.

Check resistance between terminals as shown in the figure.

Resistance: 13.5 - 17.5

Ω

[at 25°C (77°F)]

If NG, replace injector.

SEF139X

INJECTOR

QG16

I

18DE

Diagnostic Procedure (Cont’d)

EC-322

Component Description

NCEC0542

IGNITION COIL AND POWER TRANSISTOR

NCEC0542S01

The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the ignition
coil primary circuit. This on-off operation induces the proper high
voltage in the coil secondary circuit.

CONSULT-II Reference Value in Data Monitor
Mode

NCEC0543

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

IGNITION SW

I

Ignition switch: ON

,

OFF

,

ON

ON

,

OFF

,

ON

ECM Terminals and Reference Value

NCEC0544

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 ECM terminals, such as the ground.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

35
36
37
38

Y/R
PU/G
L/Y
GY/L

Ignition signal (No. 1)
Ignition signal (No. 2)
Ignition signal (No. 3)
Ignition signal (No. 4)

[Engine is running]

I

Warm-up condition

I

Idle speed

0 - 0.3V

SEF971W

[Engine is running]

I

Engine speed is 2,000 rpm

0.2 - 0.4V

SEF972W

IGNITION SIGNAL

QG16

I

18DE

Component Description

EC-323

Wiring Diagram

NCEC0545

YEC793

ENGINE
CONTROL
MODULE
RELAY

CONDENSER

Refer to EL-POWER.

BATTERY

: Detectable line for DTC

: Non-detectable line for DTC

Next page

Next page

IGNITION SIGNAL

QG16

I

18DE

Wiring Diagram

EC-324