Rear Blower Motor 1
- CHECK FUSE
Check 20A fuse No. 70.
Is the inspection result normal?
YES
GO TO 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 3.
NO
GO TO 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 4.
NO
GO TO 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 5.
NO
Less than approximately 2.5 V: GO TO 9.
NO
More than approximately 10 V: Replace A/C 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
M104
3
Ground
Yes
Is the inspection result normal?
YES
GO TO 6.
NO
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 A/C auto amp. harness connector and ground.
(+)
(-)
Condition
Voltage
(Approx.)
A/C auto amp.
Connector
Terminal
M50
34
Ground
Blower speed: 1st
(Blower motor operating)
10 V
Is the inspection result normal?
YES
Replace A/C auto amp.
NO
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
Is the inspection result normal
YES
. Refer to Component Inspection (Rear Blower Motor Relay) .
NO
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
M107
2
M104
1
Yes
Is the inspection result normal?
YES
Replace rear blower motor 1.
NO
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 A/C auto amp.
NO
Replace rear blower motor resistor 1.