Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
If DTC P1217 is displayed with DTC UXXXX or P0607, first perform the confirmation procedure for DTC UXXXX or P0607.

Is applicable DTC detected?

YES

Perform diagnosis of applicable.
- DTC UXXXX: Refer to DTC Index .
- DTC P0607: Refer to DTC Description .
NO

GO TO 2.
CHECK COOLING FAN OPERATION
With CONSULT
1. Turn ignition switch ON.
2. Perform "FAN DUTY CONTROL" in "ACTIVE TEST" mode of "ENGINE" using CONSULT.
3. Check that cooling fan speed varies according to the percentage.
Without CONSULT
1. Activate IPDM E/R auto active test and check cooling fan motors operation. Refer to Diagnosis Description .
2. Check that cooling fan operates.
Is the inspection result normal?

YES

GO TO 3.

NO

Proceed to Diagnosis Procedure .
CHECK COOLING SYSTEM FOR LEAK-I
Check cooling system for leak. Refer to System Inspection .

Is leakage detected?

YES

GO TO 4.

NO

GO TO 5.
CHECK COOLING SYSTEM FOR LEAK-II
Check the following for leak.
- Hose (Refer to System Inspection .)
- Radiator (Refer to System Inspection .)
- Water pump (Refer to Removal and Installation .)
Repair or replace malfunctioning part.
CHECK RADIATOR CAP
Check radiator cap. Refer to System Inspection .

Is the inspection result normal?

YES

GO TO 6.

NO

Replace radiator cap. Refer to Exploded View .
CHECK THERMOSTAT
Check thermostat. Refer to Removal and Installation .

Is the inspection result normal?

YES

GO TO 7.

NO

Replace thermostat. Refer to Removal and Installation .
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 8.

NO

Replace engine coolant temperature sensor. Refer to Exploded View .
OVERHEATING CAUSE ANALYSIS
If the cause cannot be isolated, check the Troubleshooting Chart .

INSPECTION END