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1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under
TROUBLE SHOOTING. Go to next step.
2. Connect scan tool. Turn ignition on. Observe RH MIX MTR POSITION FEEDBACK
parameter in HVAC data list. If scan tool indicates RH MIX MTR POSITION
FEEDBACK parameter is between 5-250 counts, see DIAGNOSTIC AIDS . If scan tool
indicates RH MIX MTR POSITION FEEDBACK parameter is not between 5-250 counts,
go to next step.
3. Turn ignition off. Disconnect right air temperature actuator. Turn ignition on. Observe RH
MIX MTR POSITION FEEDBACK parameter in HVAC data list. If scan tool indicates
RH MIX MTR POSITION FEEDBACK parameter is more than 250 counts, go to next
step. If scan tool indicates RH MIX MTR POSITION FEEDBACK parameter is 250 counts
or less, go to step 8 .
4. Turn ignition off. Connect a fused jumper wire between terminals No. 9 (Dark Blue wire)
and No. 7 (Gray/Black wire) of right air temperature actuator. Turn ignition on. Observe
RH MIX MTR POSITION FEEDBACK parameter in HVAC data list. If scan tool
indicates RH MIX MTR POSITION FEEDBACK parameter is less than 5 counts, go to
next step. If scan tool indicates RH MIX MTR POSITION FEEDBACK parameter is more
than 5 counts, go to step 9 .
5. Turn ignition off. Connect a fused jumper wire between terminals No. 9 (Dark Blue wire)
and No. 10 (Yellow wire) of right air temperature actuator. Turn ignition on. Observe RH
MIX MTR POSITION FEEDBACK parameter in HVAC data list. If scan tool indicates
RH MIX MTR POSITION FEEDBACK parameter is more than 250 counts, go to step 7 .
If scan tool indicates RH MIX MTR POSITION FEEDBACK parameter is 250 counts or
less, go to next step.
6. Check continuity between ground and terminal No. 10 (Yellow wire) of right air
temperature actuator. If continuity exists, repair short to ground in Yellow wire between
right air temperature actuator and terminal C10 of HVAC control head and go to step 15 . If
continuity does not exist, go to step 12 .
7. Check continuity in Yellow wire between terminal No. 10 of right air temperature actuator
and terminal C10 of HVAC control module. If continuity exists, go to step 11 . If continuity
does not exist, repair open in Yellow wire and go to step 15 .
8. Check continuity between ground and terminal No. 6 (Dark Blue wire) of right air
temperature actuator. If continuity exists, repair short to ground in Dark Blue wire between
terminal C3 of HVAC control head and right air temperature actuator and go to step 15 . If
continuity does not exist, go to step 12 .
9. Turn ignition off. Measure voltage between ground and terminal No. 9 (Dark Blue wire) of
right air temperature actuator. If voltage exists, repair short to voltage in Dark Blue wire
between terminal C3 of HVAC control head and right air temperature actuator and go to
2001 Chevrolet Corvette
2000-01 AUTOMATIC A/C-HEATER SYSTEMS Corvette
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