Diagnostic Procedure

Perform diagnostic test mode II (self-diagnostic results) for engine control. Check ignition signal circuit condition.

OK or NG 

1. OK (With CONSULT-II): GO TO 2.
2. OK (Without CONSULT-II): GO TO  3.
3. NG: Check ignition signal circuit for engine control. Refer to SELF-DIAGNOSTICS - 1.8L - EXCEPT CALIFORNIA CA , or SELF-DIAGNOSTICS - 1.8L - CALIFORNIA CA .

1. Start engine.
2. Select TCM INPUT SIGNALS in DATA MONITOR mode for A/T with CONSULT-II.
   Fig 1: Checking Input Signal (With CONSULT-II)

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Read out the value of ENGINE SPEED.

   Check engine speed changes according to throttle position.

OK or NG 

1. OK: GO TO  4.
2. NG: Check the following items:
   • Harness for short or open between TCM and ECM
   • Resistor and ignition coil

     Refer to SELF-DIAGNOSTICS - 1.8L - EXCEPT CALIFORNIA CA , SYSTEM or SELF-DIAGNOSTICS - 1.8L - CALIFORNIA CA .

1. Start engine.
2. Check voltage between TCM terminal 39 and ground.
   Fig 2: Checking Input Signal (Without CONSULT-II)

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

   Voltage (Idle speed): Refer to  TCM TERMINALS AND REFERENCE VALUE   .

OK or NG 

1. OK: GO TO 4.
2. NG: Check the following items:
   • Harness for short or open between TCM and ECM
   • Resistor and ignition coil

     Refer to SELF-DIAGNOSTICS - 1.8L - EXCEPT CALIFORNIA CA ] or SELF-DIAGNOSTICS - 1.8L - CALIFORNIA CA .

Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE .

OK or NG 

1. OK: INSPECTION END 
2. NG:
   1. Perform TCM input/output signal inspection.
   2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.