Nissan Murano: Driveline :: Transfer: Ty21c / Ecu Diagnosis Information. Awd Control Unit

Nissan Murano (Z52) 2015-2024 Service Manual / Transmission & Driveline / Driveline :: Transfer: Ty21c / Ecu Diagnosis Information. Awd Control Unit

Values on the Diagnosis Tool

NOTE:

The following table includes information (items) inapplicable to this Nissan Murano vehicle: For information (items) applicable to this vehicle, refer to CONSULT display items.

Monitor item	Condition	Value/Status
STOP LAMP SW	Brake pedal: Depressed	On
STOP LAMP SW	Brake pedal: Released	Off
ENG SPEED SIG	Engine stopped (Engine speed: Less than 400 rpm)	Stop
ENG SPEED SIG	Engine running (Engine speed: 400 rpm or more)	Run
ETS ACTUATOR	Engine stopped (Ignition switch: ON)	Off
ETS ACTUATOR	Engine running	On
4WD WARN LAMP	AWD warning icon/display: ON	On
4WD WARN LAMP	AWD warning icon/display: OFF	Off
4WD MODE SW	Always	AUTO
4WD MODE MON	Always	AUTO
DIS-TIRE MONI	Nissan Murano Vehicle running with normal size tire installed	0 – 4 mm
DIS-TIRE MONI	Nissan Murano Vehicle running with improper size tire installed (Front/rear tire size difference, wear condition)	4 – 8 mm, 8 – mm
P BRAKE SW	Parking brake operated	On
P BRAKE SW	Parking brake not operated	Off
BATTERY VOLT	Always	Battery voltage
THRTL POS SEN	When depressing accelerator pedal (Value rises gradually in response to throttle position.)	0 – 100%
ETS SOLENOID	Engine running At idle speed	Approx. 0.000 A
ETS SOLENOID	Engine running 3,000 rpm or more constant	Approx. 0.000 – 1.800 A*
FR RH SENSOR	Nissan Murano Vehicle stopped	0.00 mph (0.00 km/h)
FR RH SENSOR	Nissan Murano Vehicle running CAUTION: Check air pressure of tire under standard condition.	Nearly matches the speed meter display (±10% or less)
FR LH SENSOR	Nissan Murano Vehicle stopped	0.00 mph (0.00 km/h)
FR LH SENSOR	Nissan Murano Vehicle running CAUTION: Check air pressure of tire under standard condition.	Nearly matches the speed meter display (±10% or less)
RR RH SENSOR	Nissan Murano Vehicle stopped	0.00 mph (0.00 km/h)
RR RH SENSOR	Nissan Murano Vehicle running CAUTION: Check air pressure of tire under standard condition.	Nearly matches the speed meter display (±10% or less)
RR LH SENSOR	Nissan Murano Vehicle stopped	0.00 mph (0.00 km/h)
RR LH SENSOR	Nissan Murano Vehicle running CAUTION: Check air pressure of tire under standard condition.	Nearly matches the speed meter display (±10%)
Unit characteristic 1	The unit characteristics 1 of electric controlled coupling is displayed.	0.32 Amps
Unit characteristic 2	The unit characteristics 2 of electric controlled coupling is displayed.	0.58 Amps
Unit characteristic 3	The unit characteristics 3 of electric controlled coupling is displayed.	0.91 Amps
Unit characteristic 4	The unit characteristics 4 of electric controlled coupling is displayed.	1.74 Amps
Unit characteristic 5	The unit characteristics 5 of electric controlled coupling is displayed.	2.23 Amps

*: The values are changed by throttle opening and engine speed.

Reference Value

TERMINAL LAYOUT

PHYSICAL VALUES

Terminal No. (Wire color)		Description		Condition	Value (Approx.)
+	-	Signal name	Input/Output	Condition	Value (Approx.)
1 (G/W)	Ground	AWD solenoid power supply	Output	Engine speed: At idle	0 V
1 (G/W)	Ground	AWD solenoid power supply	Output	Engine speed: 3,000 rpm or more constant	2.5 V*
2 (Y)	Ground	AWD solenoid ground	Input	Always	0 V
7 (W/O)	Ground	Ignition switch	Input	Ignition switch: ON	Battery voltage
7 (W/O)	Ground	Ignition switch	Input	Ignition switch: OFF	0 V
8 (L)	—	CAN-High	Input/Output	—	—
9 (L/W)	Ground	Power supply (AWD solenoid)	Input	Always	Battery voltage
10 (GR)	Ground	Ground	—	Always	0 V
11 (GR)	Ground	Ground	—	Always	0 V
15 (G)	Ground	Power supply (AWD control unit)	Input	Always	Battery voltage
16 (P)	—	CAN-Low	Input/Output	—	—

*: The values are changed by throttle opening and engine speed.

CAUTION:

When using circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.

Fail-Safe

If any malfunction occurs in AWD electrical system, and control unit detects the malfunction, AWD warning icon/display on information display is displayed to indicate system malfunction.
When AWD warning icon/display is displayed, Nissan Murano vehicle changes to front-wheel drive or shifts to 4-wheel drive (rear-wheels still have some driving torque).

DTC	Possible cause	Nissan Murano Vehicle condition
C1201	Internal malfunction of AWD control unit	Front-wheel drive or shifts to 4-wheel drive (Rear-wheels still have some driving torque)
C1203	ABS malfunction Nissan Murano Vehicle speed signal error
C1204	Internal malfunction of electronic controlled coupling Malfunction of AWD solenoid power supply circuit (open or short) Malfunction of AWD solenoid command current
C1205	Internal malfunction of AWD control unit Malfunction of AWD solenoid power supply circuit (ground short)
C1210	Malfunction of engine control system
P1804	Internal malfunction of AWD control unit
P181F	Writing unit characteristics is incomplete
U1000	CAN communication error Internal malfunction of AWD control unit
U1010	Internal malfunction of AWD control unit

Protection Function

AWD system activates its protection function (shuts down AWD system temporarily) if AWD system detects high load continuously or the front wheel tire size differs from the rear tire size. (AWD system is automatically restored if AWD system no longer detects any overload or the tire size difference is eliminated.)

AWD warning icon/display	Possible cause	Nissan Murano Vehicle condition
(Displaying for approximately 1 minute and then turned OFF)	Drive train parts in protection mode. It is not malfunction. (Internal temperature rise of electronic controlled coupling) When this message is displayed, refer to Description.	Shuts down AWD system temporarily (Front wheel drive)
(Continuing to display until ignition switch OFF)	Malfunction in each tire or different tire diameter When this message is displayed, refer to Diagnosis Procedure.

AWD warning icon/display

Possible cause

Nissan Murano Vehicle condition

(Displaying for approximately 1 minute and then turned OFF)

Drive train parts in protection mode. It is not malfunction.

(Internal temperature rise of electronic controlled coupling)

When this message is displayed, refer to Description.

Shuts down AWD system temporarily

(Front wheel drive)

(Continuing to display until ignition switch OFF)

Malfunction in each tire or different tire diameter

When this message is displayed, refer to Diagnosis Procedure.

DTC Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority chart:

Priority	Detected items (DTC)
1	U1000 CAN COMM CIRCUIT U1010 CONTROL UNIT(CAN)
2	C1201 CONTROLLER FAILURE C1205 4WD ACTUATOR RLY
3	C1204 4WD SOLENOID
4	C1203 ABS SYSTEM C1210 ENGINE SIGNAL 1
5	P1804 CONTROL UNIT
6	P181F INCOMP CALIBRATION

DTC Index

DTC	Display Item	Reference
C1201	CONTROLLER FAILURE	DTC Description
C1203	ABS SYSTEM	DTC Description
C1204	4WD SOLENOID	DTC Description
C1205	4WD ACTUATOR RLY	DTC Description
C1210	ENGINE SIGNAL 1	DTC Description
P1804	CONTROL UNIT	DTC Description
P181F	INCOMP CALIBRATION	DTC Description
U1000	CAN COMM CIRCUIT	DTC Description
U1010	CONTROL UNIT(CAN)	DTC Description

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