Advertisement
and terminal D1 of HVAC control head and go to step 12 .
8. Check for loose wires and or poor connections of inside air temperature sensor. Repair any
problems found and go to step 12 . If wiring and connectors are okay, 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 inside air temperature sensor. See INSIDE AIR TEMPERATURE SENSOR
under REMOVAL & INSTALLATION. After repair, go to step 12 .
11. Replace HVAC control head. See HVAC CONTROL HEAD under REMOVAL &
INSTALLATION and go to next step.
12. Use scan tool to clear DTCs. See CLEARING TROUBLE CODES under TROUBLE
SHOOTING. 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 B0348: SUNLOAD TEMPERATURE SENSOR 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.
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 SUNLOAD TEMP SENSOR parameter in
HVAC data list. If scan tool indicates sunload temperature sensor value is 0.1-5 volts, see
DIAGNOSTIC AIDS . If scan tool does not indicate sunload temp sensor is 0.1-5 volts, go
to next step.
3. Turn ignition off. Disconnect sunload temperature sensor harness connector. Turn ignition
on. Use scan tool to observe SUNLOAD AIR TEMP SENSOR parameter with scan tool. If
scan tool indicates more than 4.9 volts, go to next step. If scan tool indicates 4.9 volts or
less, go to step 5 .
4. Turn ignition off. Connect a fused jumper wire between terminal "A" (Light Blue/Black
wire) and terminal "B" (Gray/Black wire) of sunload temperature sensor harness connector.
Turn ignition on (with engine off). With scan tool, observe SUNLOAD AIR TEMP
SENSOR parameter. If scan tool indicates 0.1 volt or more exists, go to step9 . If scan tool
indicates more than 0.1 volt exists, go to step6 .
2001 Chevrolet Corvette
2000-01 AUTOMATIC A/C-HEATER SYSTEMS Corvette
Advertisement
