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.

NOTE: The Signal Tech II Tool [- (J-50190)] can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

Activate and display TPMS sensor IDs
Display tire pressure reported by the TPMS sensor
Read TPMS DTCs
Register TPMS sensor IDs

CHECK CAN IGNITION SIGNAL

With CONSULT

Select "INTELLIGENT KEY" of "BCM".
Select "IGN RLY1-F/B" in "Data Monitor" mode.

Check that the function operates normally according to the following conditions:

Monitor item	Displayed value
IGN RLY1 F/B	On with ignition in ON position

Is the inspection result normal?

YES

GO TO 2.

Check CAN system. Refer to Trouble Diagnosis Flow Chart .

CHECK BCM POWER SUPPLY AND GROUND
Check BCM power supply and ground. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

GO TO 3

NO

Repair or replace harness or connectors.
DRIVE VEHICLE
Clear DTC and test drive vehicle to check for low tire pressure warning lamp.

Does the vehicle operate without any low tire pressure warning lamp?

YES

Inspection End.

NO

Replace BCM. Refer to Removal and Installation .