GMC Chevrolet Camaro 1998 Service Manual page 126

1-16 HVAC System - Manual
Functional Check (cont'd)
Step
Action
Normal Result{s)
1. Place the mode control knob • The blower motor speed
in the HEATER setting. is HIGH.
2.
Place the temperature control • There is airflow from the heater
knob in the HOT setting. outlets.
3. ,,Place the blower motor knob • There is no airflow from the
in the HIGH setting. A/C outlets.
• There is minimum air flow from
7
the defroster outlets.
• Engagement of the detent is felt
in each mode control lever
setting.
• The temperature lever travels
from full COLD to full HOT.
• Air flow is present at the side
window defogger outlets.
1. Place the mode control knob • The blower motor speed
in the DEFROSTER BLEND
is HIGH.
setting.
• There is airflow from the heater
2.
Place the temperature control
outlets.
knob in the HOT setting.
• There is no airflow from the
3. Place the blower motor knob
A/C outlets.
8 in the HIGH setting.
• There is air flow from the
defroster outlets.
• Engagement of the detent is felt
in each mode control lever
setting.
• Air flow is present at the side
window defogger outlets.
1. Place the mode control knob • The blower motor speed
in the DEFROST setting. is HIGH.
2.
Place the temperature control
• There is minimum airflow from
knob in the HOT setting. the heater outlets.
3. Place the blower motor knob
• There is no airflow from the
in the HIGH setting. A/C outlets.
9
• There is air flow from the
defroster outlets.
• Engagement of the detent is felt
in each mode control lever
setting.
• Air flow is present at the side
window defogger outlets.
*
Refer to the appropriate symptom diagnostic table for the applicable abnormal result.
HVAC Blower Controls System Check
Step Action
Normal Results
1. Place the ignition switch in the
The blower motor runs at low speed.
RUN position.
2.
Place the blower switch in the
LO position.
1
3.
Place the selector switch in the
MAX position, the NORM
position, the VENT position, the
Bl-LEV position, the HEATER
position, the HEAT/DEF
position, and the DEF position.
1. Place the selector switch in the
The blower motor increases in speed.
2
VENT position.
2.
Place the blower switch in the
M1 position.
HVAC
Abnormal Result{s)*
• Blower motor speed inop.
• Airflow from the heater, defroster
and A/C outlets.
• No engagement of the detent
is felt.
• Refer to Blower Motor
Inoperative at Any Speed,
Cooling Insufficient - AIC
Inoperative, Air Delivery
Improper or Temperature Control
Inoperative.
• Blower motor speed inop.
• No airflow from the heater and/or
defroster outlets.
• Airflow from the A/C outlets.
• No engagement of the detent
is felt.
• No airflow at the side window
defogger outlets.
• Refer to Blower Motor
Inoperative at Any Speed,
Heating Insufficient, Air Delivery
Improper or Temperature Control
Inoperative.
• Blower motor speed inop.
• Airflow from the A/C outlets.
• No airflow from the defroster
outlets.
• No engagement of the detent
is felt.
• No airflow at the side window
defogger outlets.
• Refer to Blower Motor
Inoperative at Any Speed,
Heating Insufficient, Air Delivery
Improper, Temperature Control
Inoperative.
Abnornal Results
Blower Motor Low Speed Inoperative
Blower Motor Inoperative in One
Speed Only (High Speed Operates
Normally)
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