Rear Blower Motor 1

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check 20A fuse [No. 70, located in the fuse block (J/B)].

Is the inspection result normal?

YES

GO TO STEP 2 .

NO

Replace the blown fuse after repairing the affected circuit.

CHECK POWER SUPPLY FOR REAR BLOWER MOTOR 1

Turn ignition switch ON.

Check voltage between rear blower motor 1 harness connector and ground.

(+)		(-)	Voltage (Approx.)
Rear blower motor 1
Connector	Terminal
M107	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 3 .

GO TO STEP 7 .

CHECK POWER SUPPLY FOR REAR BLOWER MOTOR RESISTOR 1

Check voltage between rear blower motor resistor 1 harness connector and ground.

(+)		(-)	Voltage (Approx.)
Rear blower motor resistor 1
Connector	Terminal
M104	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 4 .

GO TO STEP 8 .

CHECK BLOWER MOTOR CONTROL SIGNAL

Turn mode control to VENT.
Turn fan control to 1st speed.

Check voltage between rear blower motor resistor 1 harness connector and ground.

(+)		(-)	Voltage (Approx.)
Rear blower motor resistor 1
Connector	Terminal
M104	2	Ground	2.5 V

Is the inspection result normal?

YES

GO TO STEP 5 .

NO - 1

Less than approximately 2.5 V: GO TO STEP 9 .

NO - 2

More than approximately 10 V: Replace auto amp.

CHECK REAR BLOWER MOTOR RESISTOR 1 GROUND CIRCUIT

Disconnect rear blower motor resistor 1 connector.

Check continuity between rear blower motor resistor 1 harness connector and ground.

Rear blower motor resistor 1		-		Continuity
Connector	Terminal	-		Continuity
M104	3	Ground		Yes

Is the inspection result normal?

YES

GO TO STEP 6 .

Repair harness or connector.

CHECK BLOWER MOTOR FEEDBACK SIGNAL

Reconnect rear blower motor resistor 1 connector.
Turn ignition switch ON.
Turn fan control to 1st speed.

Check voltage between auto amp. harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
Auto amp.
Connector	Terminal
M50	34	Ground	Blower speed: 1st (Blower motor operating)	10 V

Is the inspection result normal?

YES

Replace auto amp.

Repair harness or connector.

CHECK POWER SUPPLY OF REAR BLOWER MOTOR RELAY

Turn ignition switch OFF.
Remove blower relay.
Turn ignition switch ON.

Check voltage between rear blower motor relay connector terminals and ground.

(+)		(-)	Voltage (Approx.)
Rear blower motor relay
Connector	Terminal
M108	1	Ground	Battery voltage
	3
	6

Is the inspection result normal

YES

Check rear blower motor relay . Refer to COMPONENT INSPECTION (REAR BLOWER MOTOR RELAY) .

Repair harness or connector .

CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND REAR BLOWER MOTOR RESISTOR 1

Turn ignition switch OFF.
Disconnect rear blower motor resistor 1 connector.

Check continuity between rear blower motor 1 harness connector and rear blower motor resistor 1 harness connector.

Rear blower motor 1		Rear blower motor resistor 1		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M107	2	M104	1	Yes

Is the inspection result normal?

YES

Replace rear blower motor 1.

Repair harness or connector.

CHECK REAR BLOWER MOTOR RESISTOR 1

Check rear blower motor resistor 1 Refer to COMPONENT INSPECTION (REAR BLOWER MOTOR RESISTOR) .

Is the inspection result normal?

YES

Replace auto amp.

NO

Replace rear blower motor resistor 1.