Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION START
Which malfunction (P0102 or P0103) is duplicated?

P0102 or P0103
- P0102: GO TO 2.
- P0103: GO TO 3.
CHECK INTAKE SYSTEM
Check the following for connection.
- Air duct
- Vacuum hoses
- Intake air passage between air duct to intake manifold
OK or NG
- OK: GO TO 3.
- NG: Reconnect the parts.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 1: Loosen & Retighten Three Ground Screws On The Body
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 4.
- NG: Repair or replace ground connections.
CHECK MAF SENSOR POWER SUPPLY CIRCUIT
1. Disconnect mass air flow (MAF) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Disconnecting Mass Air Flow Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between MAF sensor terminal 2 and ground with CONSULT-II or tester.
  - Voltage: Battery voltage
OK or NG
- OK: GO TO 6.
- NG: GO TO 5.
Fig 3: Checking Voltage Between MAF Sensor Terminal 2 & Ground Voltage Test
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E12, F3
- Harness for open or short between IPDM E/R and MAF sensor
- Harness for open or short between MAF sensor and ECM
  - : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN & SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between MAF sensor terminal 3 and ECM terminal 67.
  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 7.
- NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between MAF sensor terminal 4 and ECM terminal 51.
  Refer to WIRING DIAGRAM .
  - Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
- OK: GO TO 8.
- NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK MASS AIR FLOW SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
- OK: GO TO 9.
- NG: Replace MAF sensor.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
- : INSPECTION END