GMC Chevrolet Camaro 1998 Service Manual page 138

1-28 HVAC System - Manual
HVAC
VDOT System Performance (cont'd)
Step Action Value(s) Yes No
7
Repair the restriction in the highside line.
- -
Is the repair done?
System OK
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1. Operate the A/C system for 5 minutes or longer.
2. Record the low and high side pressures.
On engines equipped with electric cooling fans,
8
record the pressures with the fans ON.
-
3. Locate the intersection of the low and high side
pressures. Refer to the graphic/chart.
Do the low and high side pressures intersect on the right
Go to the High Go to the Low
side of the chart?
Side Pressure Side Press1,1re
High Side Pressure
Step Action Value(s) Yes No
DEFINITION: Right area diagnosis and service.
Were you sent here from the VDOT System Performance Go to the VDOT
1 Diagnostic Table? - System
..
Go to step 2 Performance
1. Start the engine.
2. Close all the vehicle doors and windows.
3. Set the A/C control to the UPPER mode.
4. Set the blower motor speed to high.
2
5.
Set the temperature control to full cold.
-
6. Push the A/C button to turn the A/Con.
7. Open the hood.
8. Feel the liquid line between the condenser and the
expansion tube.
Is the liquid line cold? Go to Step 3 Go to Step 7
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'
3
Check the cooling fan(s).
-
Are the cooling fan(s) operating? Go to Step 4 Go to Step 5
Check the airflow at the condenser for restrictions, Go to the VDOT
4
Is the airflow at the condenser restricted?
-
System
Go to Step 6 Performance
Repair or replace the cooling fan(s) as necessary. Refer to
5
Cooling Fan Replacement - Electric.
-
-
Is the repair complete? System OK
6
Remove the restriction.
-
-
Is the repair complete? System OK
7 Check the A/C system for an overcharge of refrigerant. .
-
Go to Step B Go to step 9
Recover and recharge the
A!C
system. Refer to
Go to the VDOT
8
Refrigerant Recovery and Recharging.
-
System
Is the repair complete? System OK Performance
9
Check for air in the A/C system.
- -
Is there air in the A/C system? Go to Step 10
Leak test the A/C system. Refer to Leak Testing. Go to the VDOT
10
Is there a leak in the A/C system?
-
System
Go to Step 11 Performance
1. Recover the refrigerant. Refer to Refrigerant
Recovery and Recharging.
11
2. Repair the leak in the A/C system.
-
-
3. Recharge the A/C system. Refer to Refrigerant
Recovery and Recharging.
Is the repair complete? System OK
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