Diagnosis Procedure

INSPECTION START
Turn ignition switch to START.

Are any cylinders 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 (3), F201 (1)

Fig 1: Location Of Harness Connector F44, F201 & Vacuum Tank
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch ON.
Check voltage between harness connector F44 terminal 3 and ground with CONSULT-III or tester.
Voltage: Battery voltage

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

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

ECM TERMINALS REFERENCE CHART

Cylinder	Harness connector F44 terminal	ECM terminal
1	2	23
3	1	22
5	4	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 E2, F32
- IPDM E/R harness connector E119
- 15 A fuse (No. 55)
- Harness for open or short between harness connector F44 and fuse
- Harness for open or short between harness connector F201 and fuel injector
  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 F201 as follows and then interrupt it. Listen to each fuel injector operating sound.

ECM TERMINALS REFERENCE CHART

Cylinder	Harness connector F201 terminal
Cylinder	(+)	(-)
1	3	2
3	3	1
5	3	4

Operating sound should exist.

Fig 3: Applying Battery Voltage Between Harness Connector F201

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

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: Location Of Fuel Injector Harness 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 E2, F32
- Harness connectors F44, F201
- IPDM E/R harness connector E119
- 15 A fuse (No. 55)
- 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 F201, 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. Refer to "EXPLODED VIEW ".
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

INSPECTION END