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Dark Blue wire between terminal No. 6 of right air temperature actuator and terminal C7 of
HVAC control head. If continuity exists, go to step 7 . If continuity does not exist, repair
open in Dark Blue wire and go to step 10 .
6. Turn ignition off. Check continuity in Brown wire between terminal No. 5 (Brown wire) of
right air temperature actuator and HVAC fuse 18 (10-amp) in instrument panel fuse block.
If continuity does not exist, repair open in Brown wire. If continuity exists, check continuity
in White/Black wire between terminal No. 6 of right air temperature actuator and terminal
C6 of HVAC control head. If continuity exists, go to step 8 . If continuity does not exist,
repair open in Dark Blue wire and go to step 10 .
7. Replace left air temperature actuator. See AIR TEMPERATURE ACTUATORS under
REMOVAL & INSTALLATION and go to step 10 .
8. Replace right air temperature actuator. See AIR TEMPERATURE ACTUATORS under
REMOVAL & INSTALLATION and go to step 10 .
9. Replace HVAC control head. See HVAC CONTROL HEAD under REMOVAL &
INSTALLATION and go to next step.
10. Use scan tool to clear DTCs. Operate vehicle and verify that DTCs do not reset. If DTCs
reset, go to DIAGNOSTIC SYSTEM CHECK under TROUBLE SHOOTING. If DTCs
do not reset, system is okay.
RIGHT TEMPERATURE CONTROL INOPERATIVE
1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under
TROUBLE SHOOTING. After diagnostic system check, go to next step.
2. Connect scan tool. Turn ignition on. Display HVAC data list. Depress AUTO button to off.
Turn driver's control knob to center position. Operate passenger's control knob through full
range of movement. If scan tool displays RH MIX MTR positions in relation to control
knob position, go to next step. If scan tool does not display correct left and right actuator
positions in relation to control knob position, replace HVAC control head. See HVAC
CONTROL HEAD under REMOVAL & INSTALLATION and go to step 7 .
3. Use scan tool to command RH MIX MTR in MISCELLANEOUS TESTS through full
range of movement. If scan tool indicates RH MIX MTR is operating properly, system is
okay at this time. If scan tool indicates RH MIX MTR is not operating properly, go to next
step.
4. Turn ignition off. Check continuity in Brown wire between terminal No. 5 (Brown wire) of
right air temperature actuator and HVAC fuse 18 (10-amp) in instrument panel fuse block.
If continuity does not exist, repair open in Brown wire. If continuity exists, check continuity
in White/Black wire between terminal No. 6 of right air temperature actuator and terminal
C6 of HVAC control head. If continuity exists, go to next step. If continuity does not exist,
2001 Chevrolet Corvette
2000-01 AUTOMATIC A/C-HEATER SYSTEMS Corvette
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