Manual Air Conditioning (Rear)

SYSTEM OUTLINE

1. BLOWER MOTOR (REAR HEATER) OPERATION
Current is applied at all times through the RR A/C fuse to TERMINAL 1 of the rear heater relay.

When the ignition SW is turned on, the current flows through HEATER fuse to TERMINAL 3 of the rear heater relay to TERMINAL 5 to TERMINAL 6 of the heater blower SW (Front), rear HI relay (Coil side), rear LO relay (Coil side), rear Ml relay (Coil side), rear M2 relay (Coil side) and rear relay (Coil side).

1. Heater blower SW (Front) operation
- Low speed operation
When the blower SW is moved to LO position, the current to TERMINAL 6 of the heater blower SW (Front) flows to TERMINAL 8 to GROUND, causing the rear heater relay to turn on. This causes the current to flow through the rear heater relay (Point Side) to TERMINAL 2 of the blower motor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear LO relay to TERMINAL 3 to TERMINAL 5 of the heater blower SW (Front) to TERMINAL 8 to GROUND, rotating the blower motor at low speed.

- Medium speed operation (Operation at Ml, M2)
When the blower SW is moved to Ml position, the current to TERMINAL 6 of the heater blower SW (Front) flows to TERMINAL 8 to GROUND, causing the rear heater relay to turn on. This causes the current to flow through the rear heater relay (Point Side) to TERMINAL 2 of the blower motor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear heater) to TERMINAL 3 to TERMINAL 4 of the rear Ml relay to TERMINAL 3 to TERMINAL 2 of the heater blower SW (Front) to TERMINAL 8 to GROUND. At this time, the blower resistance of the blower resistor (Rear heater) is smaller than at low speed, so the blower motor rotates at medium low speed.

When the blower SW is moved to M2 position, the current through the motor flows from TERMINAL 4 of the blower resistor (Rear heater) to TERMINAL 2 to TERMINAL 4 of the rear M2 relay to TERMINAL 3 to TERMINAL 7 of the heater blower SW (Front) to TERMINAL 8 to GROUND. At this time, resistance of the blower resistor (Rear heater) is smaller than at Ml position, so the blower motor rotates at medium high speed.

- High speed operation
When the blower SW is moved to HI position, the current to TERMINAL 6 of the heater blower SW (Front) flows to TERMINAL 8 to GROUND, causing the rear heater relay to turn on. At this time, the current flows to TERMINAL 3 of the heater blower SW (Front) to TERMINAL 8 to GROUND, causes the rear HI relay to turn on.

This causes the current to flow through the rear heater relay (Point Side) to TERMINAL 2 of the blower motor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear relay to TERMINAL 2 to TERMINAL 2 of the rear HI relay to TERMINAL 1 to GROUND, rotating the blower motor at high speed.

2. Heater blower SW (Rear) operation
With the heater blower SW (Front) at REAR position, the current to TERMINAL 6 of the heater blower SW (Front) to flows TERMINAL 8 to GROUND, causing the rear heater relay to turn on.
- Glow speed operation
When the blower SW (Rear) is moved to LO position, the current flows through the rear heater relay (Point Side) to TERMINAL 2 of the blower motor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear LO relay to TERMINAL 3 to TERMINAL 3 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 8 to GROUND, rotating the blower motor at low speed.

- Medium speed operation (Operation at Ml, M2)
When the blower SW (Rear) is moved to Ml position, the current flows through the rear heater relay (Point Side) to TERMINAL 2 of the blower motor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear heater) to TERMINAL 3 to TERMINAL 4 of the rear Ml relay to TERMINAL 3 to TERMINAL 4 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 8 to GROUND. At this time, the blower resistance of the blower resistor (Rear heater) is smaller than at low speed, so the blower motor rotates at medium low speed.

When the blower SW (Rear) is moved to M2 position, the current through the motor flows from TERMINAL 4 of the blower resistor (Rear heater) to TERMINAL 2 to TERMINAL 4 of the rear M2 relay to TERMINAL 3 to TERMINAL 8 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 8 to GROUND. At this time, resistance of the blower resistor (Rear heater) is smaller than at Ml position, so the blower motor rotates at medium high speed.

- High speed operation
When the blower SW is moved to HI position, the current flows to TERMINAL 5 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 8 to GROUND, causes the rear HI relay to turn on.

This causes the current flows through the rear heater relay (Point Side) to TERMINAL 2 of the blower motor (Rear heater) to TERMINAL 1 to TERMINAL 4 of the rear relay to TERMINAL 2 to TERMINAL 2 of the rear HI relay to TERMINAL 1 to GROUND, rotating the blower motor at high speed.

2. BLOWER MOTOR (REAR COOLING) OPERATION
Current is applied at all times through the RR A/C fuse to TERMINAL 1 of the rear heater relay.

When the ignition SW is turned on, the current flows through HEATER fuse to TERMINAL 3 of the rear heater relay to TERMINAL 5 to TERMINAL 6 of the heater blower SW (Front) and rear HI relay (Coil side).

The current from the HEATER fuse flows through the rear LO relay, rear Ml relay, rear M2 relay and rear relay to TERMINAL 3 of the volume SW to TERMINAL 4 to GROUND, causing each relay to turn on.

1. Heater blower SW (Front) operation Low speed operation
When the blower SW is moved to LO position, the current to TERMINAL 6 of the heater blower SW (Front) flows to TERMINAL 8 to GROUND, causing the rear heater relay to turn on. This causes the current to flow through the rear heater relay (Point Side) to TERMINAL 1 of the blower motor (Rear cooling) to TERMINAL 2 to TERMINAL 1 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear cooling) to TERMINAL 1 to TERMINAL 5 of the rear LO relay to TERMINAL 3 to TERMINAL 5 of the heater blower SW (Front) to TERMINAL 8 to GROUND, rotating the blower motor at low speed.

- Medium speed operation (Operation at Ml, M2)
When the blower SW is moved to Ml position, the current to TERMINAL 6 of the heater blower SW (Front) flows to TERMINAL 10 to GROUND, causing the rear heater relay to turn on. This causes the current to flow through the rear heater relay (Point Side) to TERMINAL 1 of the blower motor (Rear cooling) to TERMINAL 2 to TERMINAL 1 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear cooling) to TERMINAL 3 to TERMINAL 5 of the rear Ml relay to TERMINAL 3 to TERMINAL 2 of the heater blower SW (Front) to TERMINAL 8 to GROUND. At this time, the blower resistance of the blower resistor (Rear cooling) is smaller than at low speed, so the blower motor rotates at medium low speed.

When the blower SW is moved to M2 position, the current through the motor flows from TERMINAL 4 of the blower resistor (Rear cooling) to TERMINAL 2 to TERMINAL 5 of the rear M2 relay to TERMINAL 3 to TERMINAL 7 of the blower SW (Front) to TERMINAL 8 to GROUND. At this time, resistance of the blower resistor (Rear cooling) is smaller than at Ml position, so the blower motor rotates at medium high speed.

- High speed operation
When the blower SW is moved to HI position, the current to TERMINAL 6 of the heater blower SW (Front) flows to TERMINAL 8 to GROUND, causing the rear heater relay to turn on. At this time, the current flows to TERMINAL 3 of the heater blower SW (Front) to TERMINAL 8 to GROUND, causes the rear HI relay to turn on.

This causes the current to flow through the rear heater relay (Point Side) to TERMINAL 1 of the blower motor (Rear cooling) to TERMINAL 2 to TERMINAL 1 of the rear relay to TERMINAL 2 to TERMINAL 2 of the rear HI relay to TERMINAL 1 to GROUND, rotating the blower motor at high speed.

2. Heater blower SW (Rear) operation
With the heater blower SW (Front) at REAR position, the current to TERMINAL 6 of the heater blower SW (Front) to flows TERMINAL 8 to GROUND, causing the rear heater relay to turn on.

- Low speed operation
When the heater blower SW (Rear) is moved to LO position, the current flows through the rear heater relay (Point Side) to TERMINAL 1 of the blower motor (Rear cooling) to TERMINAL 2 to TERMINAL 1 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear cooling) to TERMINAL 1 to TERMINAL 5 of the rear LO relay to TERMINAL 3 to TERMINAL 3 of the blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 10 to GROUND, rotating the blower motor at low speed.

- Medium speed operation (Operation at Ml, M2)
When the heater blower SW (Rear) is moved to Ml position, the current flows through the rear heater relay (Point Side) to TERMINAL 1 of the blower motor (Rear cooling) to TERMINAL 2 to TERMINAL 1 of the rear relay to TERMINAL 2 to TERMINAL 4 of the blower resistor (Rear cooling) to TERMINAL 3 to TERMINAL 5 of the rear Ml relay to TERMINAL 3 to TERMINAL 4 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 10 to GROUND. At this time, the blower resistance of the blower resistor (Rear cooling) is smaller than at low speed, so the blower motor rotates at medium low speed.

When the heater blower SW (Rear) is moved to M2 position, the current through the motor flows from TERMINAL 4 of the blower resistor (Rear cooling) to TERMINAL 2 to TERMINAL 5 of the rear M2 relay to TERMINAL 3 to TERMINAL 8 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 10 to GROUND. At this time, resistance of the blower resistor (Rear cooling) is smaller than at Ml position, so the blower motor rotates at medium high speed.

- High speed operation
When the blower SW (Rear) is moved to HI position, the current flows to TERMINAL 5 of the heater blower SW (Rear) to TERMINAL 1 to TERMINAL 1 of the heater blower SW (Front) to TERMINAL 10 to GROUND, causes the rear HI relay to turn on.

This causes the current flows through the rear heater relay (Point Side) to TERMINAL 1 of the blower motor (Rear cooling) to TERMINAL 2 to TERMINAL 1 of the rear relay to TERMINAL 2 to TERMINAL 2 of the rear HI relay to TERMINAL 1 to GROUND, rotating the blower motor at high speed.