Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX80. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION START

Perform inspection in accordance with procedure that confirms DTC.

Which procedure confirms DTC?

DTC confirmation procedure 1

GO TO STEP 2 .

DTC confirmation procedure 2

GO TO STEP 6 .

CHECK DTC OF TCM

Check DTC in "Self Diagnostic Result" mode of "TCM" using CONSULT.

Is DTC detected?

YES

Perform the trouble diagnosis related to the detected DTC. Refer to DTC INDEX .

NO

GO TO STEP 3 .

CHECK BCM INPUT SIGNAL

Turn ignition switch ON.

Check voltage between BCM harness connector and ground.

(+)		(-)	Condition		Voltage (V) (Approx.)
BCM
Connector	Terminal
M71	102	Ground	Selector lever	P or N position	12
M71	102	Ground	Selector lever	Other than above	0

Is the inspection result normal?

YES

GO TO STEP 4 .

GO TO STEP 5 .

REPLACE BCM
1. Replace BCM. Refer to REMOVAL AND INSTALLATION .
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.
INSPECTION END

CHECK BCM INPUT SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect BCM connector.
Disconnect A/T assembly connector.

Check continuity between A/T assembly harness connector and BCM harness connector.

A/T assembly		BCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F51	9	M71	102	Existed

Check continuity between A/T assembly harness connector and ground.

A/T assembly		Ground	Continuity
Connector	Terminal
F51	9		Not existed

Is the inspection result normal?

YES

GO TO STEP 11 .

Repair or replace harness.

CHECK A/T SHIFT SELECTOR POWER SUPPLY

Turn ignition switch OFF.
Disconnect A/T shift selector (detention switch) connector.

Check voltage between A/T shift selector (detention switch) harness connector and ground.

(+)		(-)	Voltage (V) (Approx.)
A/T shift selector (detention switch)
Connector	Terminal
M57	13	Ground	12

Is the inspection result normal?

YES

GO TO STEP 9 .

GO TO STEP 7 .

CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT

Disconnect BCM connector.

Check continuity between A/T shift selector (detention switch) harness connector and BCM harness connector.

A/T shift selector (detention switch)		BCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M57	13	M71	104	Existed

Check continuity between A/T shift selector (detention switch) harness connector and ground.

A/T shift selector (detention switch)		Ground	Continuity
Connector	Terminal
M57	13		Not existed

Is the inspection result normal?

YES

GO TO STEP 8 .

Repair or replace harness.

REPLACE BCM
1. Replace BCM. Refer to REMOVAL AND INSTALLATION .
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.
INSPECTION END

CHECK A/T SHIFT SELECTOR CIRCUIT

Disconnect BCM connector and IPDM E/R connector.

Check continuity between A/T shift selector (detention switch) harness connector and BCM harness connector.

A/T shift selector (detention switch)		BCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M57	14	M68	37	Existed

Check continuity between A/T shift selector (detention switch) harness connector and ground.

A/T shift selector (detention switch)		Ground	Continuity
Connector	Terminal
M57	14		Not existed

Is the inspection result normal?

YES

GO TO STEP 10 .

Repair or replace harness.

CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)

Refer to COMPONENT INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 11 .

NO

Replace A/T shift selector. Refer to REMOVAL AND INSTALLATION .

CHECK INTERMITTENT INCIDENT

Refer to INTERMITTENT INCIDENT .

INSPECTION END