Diagnosis Procedure

INSPECTION START
Turn ignition switch to START.

Is any cylinder ignited?

Yes or No

Yes (With CONSULT-III): GO TO 2.

Yes (Without CONSULT-III): GO TO 3.

No: GO TO 7.
CHECK OVERALL FUNCTION
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
OK or NG

OK: INSPECTION END

NG: GO TO 7.

CHECK FUNCTION OF FUEL INJECTOR-I

Without CONSULT-III

Stop engine.
Disconnect harness connector F44 (2), F101 (3).
Turn ignition switch ON.
- ← : Vehicle front
- Intake manifold collector (1)
Fig 1: Identifying Intake Manifold Collector
Courtesy of NISSAN MOTOR CO., U.S.A.
Check voltage between harness connector F44 terminal 5 and ground with CONSULT-III or tester.
Voltage: Battery voltage

Fig 2: Checking Continuity Between Connector F44 Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch OFF.
Disconnect ECM harness connector.

Check harness continuity between harness connector F44 terminal and ECM terminal as follows.

TERMINALS REFERENCE CHART

Cylinder	Harness connector F44 terminal	ECM terminal
1	6	23
3	2	22
5	1	21

Continuity should exist.

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

OK or NG

OK: GO TO 5.

NG: GO TO 4.

DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E8, F17
- Fuse block (J/B) connector E30
- 10 A fuse
- Harness for open or short between harness connector F44 and fuse
- Harness for open or short between harness connector F44 and ECM
Repair open circuit or short to ground or short to power in harness or connectors.

CHECK FUNCTION OF FUEL INJECTOR-II

Provide battery voltage between harness connector F101 as follows and then interrupt it. Listen to each fuel injector operating sound.

TERMINALS REFERENCE CHART

Cylinder	Harness connector F101 terminal
Cylinder	(+)	(-)
1	5	6
3	5	2
5	5	1

Fig 3: Checking Voltage Between Connector F101 Terminals

Courtesy of NISSAN MOTOR CO., U.S.A.

Operating sound should exist.

OK or NG

OK: GO TO 6.

NG: GO TO 7.

CHECK FUNCTION OF FUEL INJECTOR-III
1. Reconnect all harness connector disconnected.
2. Start engine.
3. Listen to fuel injectors No. 2, No. 4, No. 6 operating sound.
Clicking noise should exist.

OK or NG

OK: INSPECTION END

NG: GO TO 7.

Fig 4: Checking Fuel Injector Operating Sound
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
  
  Fig 5: Identifying Fuel Injector Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between fuel injector terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage

Fig 6: Checking Voltage Between Fuel Injector Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 9.

NG: GO TO 8.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E8, F17
- Harness connectors F44, F101
- Fuse block (J/B) connector E30
- 10 A fuse
- Harness for open or short between fuel injector and fuse
Repair harness or connectors.
CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.
  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 11.

NG: GO TO 10.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F101, F44
- Harness for open or short between fuel injector and ECM
Repair open circuit or short to ground or short to power in harness or connectors.
CHECK FUEL INJECTOR
Refer to , "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 12.

NG: Replace fuel injector.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END