Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

Do the self-diagnosis results indicate PNP switch, ATF pressure switch 1?
1. YES: Check the malfunctioning system. Refer to "DTC P1705 THROTTLE POSITION SENSOR ", "DTC P1841 ATF PRESSURE SWITCH 1 ".
2. NO: GO TO 2.
CHECK 4TH POSITION SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch "ON".
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Read out "OD CONT SW" switch moving selector lever to each position.
Fig 1: OD CONT Display Value Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Consult II DATA MONITOR Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II
1. Turn ignition switch "ON". (Do not start engine)
2. Check voltage between A/T device harness connector terminal 1 and ground.
Fig 3: A/T Device Harness Connector Terminal & Ground Voltage Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Checking Voltage Between A/T Device Harness Connector Terminal 1 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace damaged parts.
CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to "CHECKING A/T FLUID ".

Fig 5: Checking A/T Fluid Level
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 4.
2. NG: Refill ATF.
CHECK CONTROL CABLE
Check the control cable.

Fig 6: Checking Control Cable
Courtesy of NISSAN MOTOR CO., U.S.A.
- Refer to "CHECKING OF A/T POSITION ".
OK or NG
1. OK: GO TO 5.
2. NG: Adjust control cable. Refer to "ADJUSTMENT OF A/T POSITION ".
CHECK A/T FLUID CONDITION

Fig 7: Checking A/T Fluid Condition
Courtesy of NISSAN MOTOR CO., U.S.A.
1. Remove oil pan. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
2. Check A/T fluid condition. Refer to "FLUID CONDITION CHECK ".
OK or NG
1. OK: GO TO 6.
2. NG: GO TO 9.
DETECT MALFUNCTIONING ITEM
- Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "SYMPTOM CHART " (Symptom No. 14).
OK or NG
1. OK: GO TO 7.
2. NG: Repair or replace damaged parts.
CHECK SYMPTOM
Check again. Refer to "CRUISE TEST - PART 3 ".

OK or NG
1. OK: INSPECTION END
2. NG: GO TO 8.
PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
1. OK: INSPECTION END
2. NG: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
- Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "SYMPTOM CHART " (Symptom No. 14).
OK or NG
1. OK: GO TO 7.
2. NG: Repair or replace damaged parts.