Honda Acura NSX 1991 Service Manual page 922

Troubleshooting
Self-diagnosis indicator light I comes on: Indicates a problem in the vent door control motor circuit. Use a digital
multimeter (KS-AHM32-03) to check it.
The vent door control motor regulates the vent door according to output from the control unit.
Problem in the vent door control
Turn the ignition switch OFF.
Make sure all wires in the vent
door control motor connector are
securely attached. Make sure the
linkage is free of obstructions.
Remove the climate control unit
(page 22-84). Leave the wire
connected.
Turn the ignition switch ON.
Set the temperature control dial at
TEMP display 18, then measure
battery voltage between No.5 ter-
minal and body ground when
turning temperature control dial at
TEMP display 32. After, measure
battery voltage between No. 19
terminal and body ground when
turning temperature control dial at
TEMP display 18.
To page 22-35
22-34
Substitute a known-good control
unit and recheck. If symptom/indi-
t h
No.5
e