Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK DTC WITH ECM
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.
CHECK INPUT SIGNAL (WITH CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
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
Fig 1: CONSULT-II Display - DATA MONITOR Mode For A/T
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INPUT SIGNAL (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 39 and ground.
  
  Fig 2: Checking Voltage Between TCM Terminal 39 And Ground
  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
CHECK DTC
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.