Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test L: Passenger HVAC Control Does Not Operate Properly
2004 Oldsmobile Bravada RWDSECTION Test L: Passenger HVAC Control Does Not Operate Properly
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. After performing system check, go to next step.
- Turn ignition ON, engine OFF. Connect scan tool. Observe AUTO HVAC W/DUAL ZONE OPTION parameter in DASH INTEGRATION MODULE (DIM) SET OPTIONS data list. If scan tool indicates, AUTO HVAC W/DUAL ZONE OPTION is active, go to next step. If scan tool indicates AUTO HVAC W/DUAL ZONE OPTION is not active, go to step 6.
- Place AUTO control switch in on position. Using scan tool, observe PASS HVAC SWITCH parameter in DRIVER DOOR MODULE data list. Place passenger's air temperature switch in the warmest position. If value of PASS HVAC SWITCH parameter changes, go to next step. If value of PASS HVAC SWITCH parameter does not change, go to step 7.
- Connect scan tool. Observe RIGHT PROGRAM NUMBER parameter in INSTRUMENT PANEL MODULE data list. Place passenger's air temperature switch from coldest to warmest position. If RIGHT PROGRAM NUMBER parameter increases, go to next step. If RIGHT PROGRAM NUMBER parameter does not increase, go to step 8.
- Place Passenger's Air Temperature Switch in warmest position. Using scan tool, observe RIGHT PROGRAM NUMBER parameter in INSTRUMENT PANEL MODULE data list. Press OFF control knob one time on HVAC control head. If RIGHT PROGRAM NUMBER parameter changes, test for intermittent loose wires and connectors. See INTERMITTENTS under TROUBLE SHOOTING. If RIGHT PROGRAM NUMBER parameter does not change, go to step 8.
- Using scan tool, enable AUTO HVAC W/DUAL ZONE option in DIM set options data list. When complete, go to step 11.
- Check for loose wires and/or poor connections at Passenger's Air Temperature Switch and Passenger Door Module. If poor connection is found, repair as necessary. When repair is complete, go to step 11. If poor connection is not found, go to step 9.
- Check for loose wires and/or poor connections at Instrument Panel Module (IPM) harness connector. If poor connection is found, repair as necessary. When repair is complete, go to step 11. If poor connection is not found, go to step 10.
- Replace Passenger-Side Temperature Control Panel. See PASSENGER-SIDE TEMPERATURE CONTROL PANEL under REMOVAL & INSTALLATION. When repair is complete, go to step 11.
- Replace IPM. See INSTRUMENT PANEL MODULE (IPM) under REMOVAL & INSTALLATION. When repair is complete, go to next step.
- Operate system to verify repair. If condition is corrected, system is okay. If condition is not corrected, go to step 2.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.