Diagnosis Procedure

With CONSULT 

Perform unified meter and A/C amp. self-diagnosis.

Is any error system detected? 

YES: Check the error system.

NO: GO TO 2.

1. Turn the ignition switch OFF.
2. Disconnect unified meter and A/C amp. harness connector.
3. Disconnect power steering control unit harness connector.
4. Check the continuity between unified meter and A/C amp. harness connector and power steering control unit harness connector.

   Unified meter and A/C amp.		Power steering control unit		Continuity
   Connector	Terminal	Connector	Terminal
   M66	8	M108	8	Existed

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

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair or replace damaged parts.

1. Turn the ignition switch OFF.
2. Connect unified meter and A/C amp. harness connector.
3. Check the unified meter and A/C amp. input/output standard values. Refer to "REFERENCE VALUE ".

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Replace unified meter and A/C amp. Refer to "EXPLODED VIEW ".

1. Turn the ignition switch OFF.
2. Connect power steering control unit harness connector.
3. Check the signal between power steering control unit harness connector and ground with oscilloscope.

   Power steering control unit			Value (Approx.)
   Connector	Terminal	Condition
   M108	8 - Ground	Vehicle speed: 40 km/h (25 MPH) CAUTION: Check the air pressure of tire under standard condition.	Courtesy of NISSAN NORTH AMERICA, INC.

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

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Replace power steering control unit. Refer to "EXPLODED VIEW ".

• Check the power steering control unit pin terminals for damage or loose connection with harness connector.
• Check the unified meter and A/C amp. pin terminals for damage or loose connection with harness connector.

  Is the inspection result normal? 

  YES: INSPECTION END

  NO: Repair or replace damaged parts.