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 POWER SOURCE (STOP LAMP RELAY)

Turn ignition switch OFF.
Disconnect stop lamp relay connector.

Check voltage between stop lamp relay connector and ground.

Stop lamp relay

Ground

Voltage

(Approx.)

Connector

Terminal

E34

1, 3

Battery voltage

Is the inspection result normal?

YES

GO TO 2 .

Check the following:

Harness for short or open between fuse block (J/B) and stop lamp relay.
10A fuse (No. 10, located in fuse block [J/B])

CHECK STOP LAMP RELAY
Check stop lamp relay. Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 3 .

NO

Replace stop lamp relay.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND STOP LAMP RELAY

Check continuity between stop lamp relay connector and stop lamp switch connector.

Stop lamp switch		Stop lamp relay		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E38	2	E34	2	Yes

Is the inspection result normal?

YES

GO TO 4.

Repair or replace damaged parts.

CHECK GROUND CIRCUIT (STOP LAMP SWITCH)

Remove the stop lamp switch.

Check continuity between stop lamp switch connector and ground.

Stop lamp switch		Ground	Continuity
Connector	Terminal (+)
E38	1		Yes

Is the inspection result normal?

YES

GO TO 5.

Repair or replace damaged parts.

CHECK STOP LAMP SWITCH
Check stop lamp switch. Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 6.

NO

Replace stop lamp switch.

CHECK HARNESS BETWEEN STOP LAMP RELAY AND BCM

Check continuity between stop lamp relay connector and BCM connector.

BCM		Stop lamp relay		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M21	27	E34	5	Yes

Is the inspection result normal?

YES

GO TO 7.

Repair or replace damaged parts.

CHECK HARNESS BETWEEN BCM AND CVT SHIFT SELECTOR FOR OPEN

Disconnect CVT shift selector and BCM.

Check continuity between BCM and CVT shift selector.

BCM		CVT shift selector		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M18	108	M78	3	Yes

Is the inspection result normal?

YES

GO TO 8.

Repair or replace damaged parts.

CHECK HARNESS BETWEEN BCM AND CVT SHIFT SELECTOR FOR SHORT CIRCUIT

Check continuity between BCM and ground.

BCM		Ground	Continuity
Connector	Terminal
M18	108		No

Is the inspection result normal?

YES

GO TO 9.

Repair or replace damaged parts.

CHECK GROUND CIRCUIT (CVT SHIFT SELECTOR)

Check continuity between CVT shift selector and ground.

CVT shift selector		Ground	Continuity
Connector	Terminal
M78	4		Yes

Is the inspection result normal?

YES

Replace shift lock solenoid. Refer to Exploded View .

Repair or replace damaged parts.