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head and go to step 15 . If continuity does not exist, go to step 12 .
9. Measure voltage between ground and terminal No. 9 (Light Blue wire) of left air
temperature actuator harness connector. If voltage exists, repair short to voltage in Light
Blue wire between left air temperature actuator and terminal C8 of HVAC control head. If
voltage does not exist, check continuity in Light Blue wire between terminal No. 9 of left
air temperature actuator harness connector and terminal C8 of HVAC control head. If
continuity exists, go to next step. If continuity does not exist, repair open in Light/Blue wire
and go to step 15 .
10. Check continuity between ground and terminal No. 7 (Gray/Black wire) of left air
temperature actuator. If continuity exists, go to step 12 . If continuity does not exist, repair
open or high resistance in Gray/Black wire between left air temperature actuator and
terminal D1 of HVAC control head and go to step 15 .
11. Check for loose wires and or poor connections to left air temperature actuator. Repair any
problems found and go to step 15 . If wiring and connectors are okay, go to step 13 .
12. Check for loose wires and or poor connections to HVAC control head. Repair any problems
found and go to step 15 . If wires and connections are okay, go to step 14 .
13. Replace left air temperature actuator. See AIR TEMPERATURE ACTUATORS under
REMOVAL & INSTALLATION. After repair, go to step 15 .
14. Replace HVAC control head. See HVAC CONTROL HEAD under REMOVAL &
INSTALLATION and go to next step.
15. Use scan tool to clear DTCs. See CLEARING TROUBLE CODES under SELF-
DIAGNOSTICS. Operate vehicle and verify that DTCs do not reset. If DTCs reset, go to
step 3 . If DTCs do not reset, system is okay.
DTC B0363: LEFT ACTUATOR FEEDBACK OPEN
Diagnostic Aids
If DTC is intermittent or has a history, perform tests while wiggling wiring and connectors. This
can often cause the malfunction to appear. Inspect sensor connector and harness for damage,
corrosion or water intrusion. Check for adequate terminal tension, harness routing, damaged wire
insulation, and broken wires.
Connect a scan tool to Diagnostic Link Connector (DLC) and turn ignition on. Select the
OUTPUT CONTROL screen in HVAC SPECIAL FUNCTIONS. Use MISCELLANEOUS
TEST screen to manually drive LH ELECTRIC ACTUATOR with scan tool from fully open to
fully closed. Use scan tool to monitor LH MIX MTR POSITION FEEDBACK. A normal
position feedback signal should range between 0-255 counts as electric actuator is being moved.
2001 Chevrolet Corvette
2000-01 AUTOMATIC A/C-HEATER SYSTEMS Corvette
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