GMC Chevrolet Camaro 1998 Service Manual page 137

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HVAC
L 10~
0
w
90--
$
80-
1 70-
D
E 6(}-
p SO-
R
E
4(}-
S 30-
S
U 2(}-
R 10-
E
Step
100
HVAC System - Manual 1-27
.
LEFT
RIGHT
_.,.,
l..--'"
NORMAL
--~----
200
300 400
176737
VDOT System Performance
Action Value(s) Yes No
DEFINITION: The A/C system is blowing warm air. Checking the VDOT system performance.
Were you sent here from the Compressor Clutch
Go to the VDOT
1
Engagement Diagnostic Table?
-
System
Go to Step 2 Performance table
1.
Close all the vehicle windows and doors.
2. Set the A/C control to NORM A/C mode.
3. Set the blower motor speed to high.
4. Set the temperature control to full cold.
2
5. Let the engine run at idle speed for 5 minutes.
-
6. Feel the liquid line on both sides of the expansion
(orifice) tube.
Is the temperature the same on both sides of the
expansion (orifice) tube? Go to Step 3 Go to Step 8
1. Recover the refrigerant. Refer to Refrigerant
Recovery and Recharging.
3
2.
Inspect for a missing expansion (orifice) tube
-
or 0-ring.
Is the expansion (orifice) tube or the 0-ring missing? Go to Step 4 Go to Step 5
4
Replace the missing expansion (orifice) tube or the 0-ring.
- -
Is the repair complete? Go to Step 6
5
Inspect for a restriction in the highside line.
-
-
Is there a restriction?
Go to Step 7
1. Recover and recharge the A/C system. Refer to
Refrigerant Recovery and Recharging.
6
2.
Leak test the system.
-
3. Check the discharge temperature.
Is the discharge temperature within specifications? System OK Go to Step 8