Engine Coolant Temperature Signal Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Infiniti FX45, 2005 Infiniti FX35, 2004 Infiniti FX45, 2004 Infiniti FX35, and 2003 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

Symptom: Water temperature gauge indication is malfunction.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

Start engine and select "METER A/C AMP" on CONSULT-II.
Using "W TEMP METER" on "DATA MONITOR", compare the value of "DATA MONITOR" with water temperature gauge pointer of combination meter.

DIAGNOSIS PROCEDURE

Water temperature gauge pointer	Reference value of data monitor °C (°F)
Hot	Approx. 130 (266)
Middle	Approx. 70-105 (158-221)
Cold	Approx. 50 (122)

Fig 1: CONSULT-II Diagnosis Function Display (3 Of 5)

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

OK or NG

OK: GO TO 2.
NG: Replace combination meter.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Select "ENGINE" on CONSULT-II.
2. Using "COOLAN TEMP/S" on "DATA MONITOR", print out the CONSULT-II screen.
3. Select "METER A/C AMP" on CONSULT-II.
4. Using "W TEMP METER" on "DATA MONITOR", compare the value of "DATA MONITOR" with that of the "COOLAN TEMP/S".
OK or NG
1. OK: Perform ECM self-diagnosis. Refer to "CONSULT-II FUNCTION (ENGINE) " (for VQ35DE) or "CONSULT-II FUNCTION (ENGINE) " (for VK45DE).
2. NG: Replace unified meter and A/C amp. Refer to "REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. ".
Fig 2: CONSULT-II Diagnosis Function Display (4 Of 5)
Courtesy of NISSAN MOTOR CO., U.S.A.