Diagnosis Procedure

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

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Disconnect the following harness connectors.
- ECM
- Low tire pressure warning control unit
- Front air control (with manual air conditioning system)
- A/C auto amp. (with automatic air conditioning system)

Check the continuity between the low tire pressure warning control unit harness connector and the front air control harness connector or the A/C auto amp. harness connector.

With manual air conditioning system

Low tire pressure warning control unit harness connector		Front air control harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
M123	2	M132	1	Existed
	11		17	Existed

With automatic air conditioning system

Low tire pressure warning control unit harness connector		A/C auto amp. harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
M123	2	M137	1	Existed
	11		21	Existed

Is the inspection result normal?

YES

Check CAN system type decision again.

YES

Error was detected in the main line between the low tire pressure warning control unit and the front air control or the A/C auto amp.

Repair the main line between the low tire pressure warning control unit and the front air control harness connector or the A/C auto amp. harness connector.