Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK STEERING SWITCHES RESISTANCE

Turn ignition switch OFF.
Disconnect combination switch connector M149.
Check the resistance between the terminals of combination switch connector M149.

Combination switch connector M149		Condition	Resistance Ohm (Approx.)
Terminal	Terminal	Condition	Resistance Ohm (Approx.)
14	17	Depress SOURCE switch.	1
		Depress switch.	121
		Depress switch.	321
		Depress switch.	723
		Depress ENTER switch.	2023
15		Depress switch.	1
		Depress switch.	121
		Depress switch.	321
		Depress switch.	723
		Depress DISP switch.	2023

Is the inspection result normal?

YES

GO TO 2.

Replace steering switches. Refer to Removal and Installation .

CHECK HARNESS BETWEEN COMBINATION SWITCH AND COMBINATION METER

Disconnect combination meter connector M24 and combination switch connector M30.

Check continuity between combination meter connector M24 and combination switch connector M30.

Combination meter		Combination switch		Continuity
Connector	Terminal	Connector	Terminal
M24	3	M30	24	Yes
	24		33
	4		31

Check continuity between combination meter connector M24 and ground.

Combination meter		Ground	Continuity
Connector	Terminal
M24	3	--	No
	24
	4

Is the inspection result normal?

YES

GO TO 3.

Repair or replace harness or connectors.

CHECK COMBINATION SWITCH

Check continuity between combination switch connectors M30 and M149.

Combination switch				Continuity
Connector	Terminal	Connector	Terminal
M30	24	M149	14	Yes
	31		15
	33		17

Is the inspection result normal?

YES

GO TO 4.

Replace spiral cable. Refer to Removal and Installation .

CHECK HARNESS BETWEEN COMBINATION METER AND DISPLAY CONTROL UNIT

Disconnect display control unit connector M92.

Check continuity between combination meter connector M24 and display control unit connector M92.

Combination meter		Display control unit		Continuity
Connector	Terminal	Connector	Terminal
M24	36	M92	6	Yes
	37		18

Check continuity between combination meter connector M24 and ground.

Combination meter		Ground	Continuity
Connector	Terminal
M24	36	--	No
	37

Is the inspection result normal?

YES

Replace display control unit. Refer to Removal and Installation .

Repair or replace harness or connectors.