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temperature sensor and terminal D3 of HVAC control module. If continuity exists, go to
next step. If continuity does not exist, repair open or high resistance in Light Green/Black
wire and go to step 12 .
7. Check continuity of Gray/Black wire between terminal "B" of ambient outside air
temperature sensor and terminal D1 of HVAC control head. If continuity exists, go to step
9 . If continuity does not exist, repair open or high resistance in Gray/Black wire and go to
step 12 .
8. Check for loose wires and or poor connectors at ambient outside air temperature sensor.
Repair any problems found and go to step 12 . If problems were not found, go to step 10 .
9. Check for loose wires and or poor connections at HVAC control head. Repair any problems
found and go to step 12 . If wiring and connectors are okay, go to step 11 .
10. Replace ambient outside air temperature sensor. See AMBIENT AIR TEMPERATURE
SENSOR under REMOVAL & INSTALLATION and go to step 12 .
11. Replace HVAC control head. See HVAC CONTROL HEAD under REMOVAL &
INSTALLATION. After repair, go to step 12 .
12. 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 2 . If DTCs do not reset, system is okay.
DTC B0337: INSIDE TEMPERATURE SENSOR SHORT TO GROUND
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. Resistance value of sensor must be close to values listed in chart.
See OUTSIDE AIR TEMPERATURE SENSOR RESISTANCE or INSIDE AIR
TEMPERATURE SENSOR RESISTANCE . If sensor is out of specification, it must be
replaced.
Diagnostic Procedure
1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under
TROUBLE SHOOTING. Go to next step.
2. Connect scan tool. Turn ignition on. Observe INSIDE AIR TEMP SENSOR in HVAC data
list. If scan tool indicates inside air temperature sensor value is 0.1-5 volts, see
DIAGNOSTIC AIDS . If scan tool does not indicate inside air temperature sensor value is
0.1-5 volts, go to next step.
2001 Chevrolet Corvette
2000-01 AUTOMATIC A/C-HEATER SYSTEMS Corvette
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