Diagnostic Procedure

INSPECTION START
Turn ignition switch to START.

Is any cylinder ignited?

Yes or No
- Yes (With CONSULT-II): GO TO 2.
- Yes (Without CONSULT-II): GO TO 3.
- No: GO TO 7.
CHECK OVERALL FUNCTION
WITH CONSULT-II
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-II.
3. Make sure that each circuit produces a momentary engine speed drop.
  
  Fig 1: CONSULT-II Active Test Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: INSPECTION END
- NG: GO TO 7.

CHECK FUNCTION OF INJECTOR-I

Without CONSULT-II

Stop engine.
Disconnect harness connector F29, F201.
Turn ignition switch ON.

Fig 2: Disconnecting Harness Connector F29, F201
Courtesy of NISSAN MOTOR CO., U.S.A.
Check voltage between harness connector F29 terminal 5 and ground with CONSULT-II or tester.
- Voltage: Battery voltage
Turn ignition switch OFF.
Disconnect ECM harness connector.

Check harness continuity between harness connector F29 terminals and ECM terminals as follows. Refer to WIRING DIAGRAM .

ECM TERMINAL REFERENCE

Cylinder	Harness connector F29 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.

Fig 3: Checking Voltage Between Harness Connector F29 Terminal 5 And Ground

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

DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M82, F102
- Fuse block (J/B) connector M1
- 10A fuse
- Harness for open or short between harness connector F29 and fuse
- Harness for open or short between harness connector F29 and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.

CHECK FUNCTION OF INJECTOR-II

Provide battery voltage between harness connector F201 as follows and then interrupt it. Listen to each injector operating sound.

HARNESS CONNECTOR F201 TERMINAL REFERENCE

Cylinder	Harness connector F201 terminal
	(+)	(-)
1	5	6
3	5	2
5	5	1

Operating sound should exist .

Fig 4: Checking Battery Voltage Between Harness Connector F201 And Interrupt

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

OK or NG

OK: GO TO 6.
NG: GO TO 7.

CHECK FUNCTION OF INJECTOR-III
1. Reconnect all harness connector disconnected.
2. Start engine.
3. Listen to injectors No. 2, No. 4, No. 6 operating sound.
  - Clicking noise should exist .
OK or NG
- OK: INSPECTION END
- NG: GO TO 7.
Fig 5: Listening Injectors No. 2, No. 4, No. 6 Operating Sound
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect injector harness connector.
  
  Fig 6: Disconnecting Injector Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between injector terminal 1 and ground with CONSULT-II or tester.
  - Voltage: Battery voltage
OK or NG
- OK: GO TO 9.
- NG: GO TO 8.
Fig 7: Checking Voltage Between Injector Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M82, F102
- Harness connectors F201, F29
- Fuse block (J/B) connector M1
- 10A fuse
- Harness for open or short between injector and fuse
  - Repair harness or connectors.
CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between 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 F29, F201
- Harness for open or short between injector and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
CHECK INJECTOR
Refer to "COMPONENT INSPECTION ".

OK or NG
- OK: GO TO 12.
- NG: Replace injector.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
- INSPECTION END