Diagnostic Trouble Codes Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:

For best results, perform at ambient temperature of -10°C (14°F) or higher.
For best results, perform at engine coolant temperature of -10°C (14°F) to 68°C (154°F).

With CONSULT-II

Replace thermostat with new one. Refer to THERMOSTAT AND THERMOSTAT HOUSING . Use only a genuine NISSAN thermostat as a replacement. If an incorrect thermostat is used, the MIL may come on.
Turn ignition switch ON.
Select "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT-II.

Fig 1: COOLAN TEMP/S In DATA MONITOR Mode - CONSULT-II Screen Display
Courtesy of NISSAN MOTOR CO., U.S.A.
Check that the "COOLAN TEMP/S" is above 68°C (154°F). If it is below 68°C (154°F), go to following step.
If it is above 68°C (154°F), stop engine and cool down the engine to less than 68°C (154°F), then retry from step 1.
Drive vehicle for 10 consecutive minutes under the following conditions.
DTC P0128 CONFIRMATION PROCEDURE (VEHICLE SPEED)

VHCL SPEED SE 80 - 120 km/h (50 - 75 MPH)

If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE ".

With GST

Follow the procedure "WITH CONSULT-II" above.