AC-4
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
General Description
5. CONTROL SWITCHES
Start and warm-up the engine completely.
1) Inspection using switches
2) Compressor operation inspection
3) Inspection of illumination control
No. Point to check Switch operation Judgment standard
1 Fan speed control dial Turn the fan speed control dial clockwise.Fan speed changes 1st → 2nd → 3rd → 4th
as dial turn.
2AUTO switch1) Press the AUTO switch.
2) Turn the temperature control dial to the left
fully, and set maximum cool position. Outlet air temperature: COOL
Fan speed: 4th
Outlet opening: VENT
Inlet opening: RECIRC
Compressor: AUTO
3) Turn the temperature control dial to the right
slowly, and change the setting from maximum
cool position to maximum hot position gradually. Outlet air temperature: COOL → HOT
Fan speed: AUTO
Outlet opening: AUTO
Inlet opening: AUTO
Compressor: AUTO
4) Turn the temperature control dial to the right
fully, and set maximum hot position. Outlet air temperature: HOT
Fan speed: 4th
Outlet opening: HEAT
Inlet opening: FRESH
Compressor: AUTO
3 Defroster switch Press the defroster switch. Outlet air temperature: AUTO
Fan speed: AUTO
Outlet opening: DEF
Inlet opening: FRESH
Compressor: ON
4FRESH/RECIRC
switchPress the FRESH/RECIRC switch.Inlet opening switches RECIRC → FRESH or
FRESH → RECIRC each time pressing the
switch.
5 Mode control dial Press the mode control dial.Outlet opening switches VENT → BI-LEVEL
→ HEAT → DEF/HEAT each time dialing
clockwise.
No. Point to check Switch operation Judgment standard
1 Compressor1) A/C switch is turned to ON.
2) Turn the fan speed control clockwise.Compressor: ON
No. Point to check Switch operation Judgment standard
1 Illumination1) Turn the lighting switch to ON. Illumination comes on.
2) Press the OFF switch one second or more. Illumination dimming is cancelled.
4AT-141
AUTOMATIC TRANSMISSION
AT Main Case
3) Set the one way clutch inner race to low clutch
drum. Make sure that the forward clutch is free in
the clockwise direction and locked in the counter
clockwise direction, as viewed from the front of the
vehicle.
E: INSPECTION
1. HIGH CLUTCH AND REVERSE CLUTCH
Check the following items:
Drive plate facing for wear and damage
Snap ring for wear, return spring for setting and
breakage, and snap ring retainer for deformation
Lip seal and D-ring for damage
Piston and drum check ball for operation
Adjust total end play.
JUSTMENT, Oil Pump Housing.>
2. PLANETARY GEAR AND LOW CLUTCH
Check the following items:
Drive plate facing for wear and damage
Snap ring for wear, return spring for setting and
breakage, and spring retainer for deformation
Lip seal and D-ring for damage
Piston check ball for operation
Measure the total end play and adjust it within
specifications.
Oil Pump Housing.>
3. 2-4 BRAKE
Check the following items:
Drive plate facing for wear and damage
Snap ring for wear and spring retainer for defor-
mation
Lip seal and D-ring for damage
Measure the total end play and adjust it within
specifications.
Oil Pump Housing.>
4. ONE-WAY CLUTCH
Make sure the snap ring is not worn and the seal
rings are not deformed.
Measure the total end play and adjust it within
specifications.
Oil Pump Housing.>
5. LOW AND REVERSE BRAKE
Check the following:
Drive plate facing for wear and damage
Snap ring for wear and spring retainer for defor-
mation
(A) Locked
(B) Free
AT-00282
(B) (A)
