The only thingasfar as intstrument cluster is thatjust plain be badyur temp controls can be anything as far as heater controlstht is avacuum operated so it can be a leak or the control is leaking vacuum if at the heater control you can get voltage then you are suppliying the gorund to make it get voltage. If thi si autmatic temp control whichmeans there are sensors all overlike inside and outside you really need to know how to diagnose that. There is a blower relay on lh wheel well for hi and low. Here is chart and how to get codes for heater control. But this si where you set etmp bu ttry it anyhow.
ENTERING SELF DIAGNOSTICS
To enter self diagnostics, press and hold fan up and down arrow at same time for approximately 5 seconds. Liquid Crystal Display (LCD) will show " 00." Press "AUTO" and LCD will show fault codes stored in
When in diagnostic mode, it is possible to check several different system parameters (circuits or systems). This is done by pressing either fan up or down arrow button. Once parameter to be checked is chosen, press fan
"AUTO" button and a diagnostic value will be displayed on LCD. Refer to ELECTRONIC CLIMATE CONTROL PARAMETERS in Fig. 3 .
Fig. 3: Electronic Climate Control Parameters
Courtesy of GENERAL MOTORS CORP.
TROUBLE CODE DESCRIPTIONS
NOTE: For diagnosis of ECC system trouble codes, refer to TROUBLE SHOOTING FLOW CHARTS at end of this article.
Code Number Symptom
00 Not Used
01 Air Mix Door Actuator Circuit Fault
02 Air Mix Door Actuator Circuit Fault
03 Outside Temperature Sensor Circuit Open
04 Outside Temperature Sensor Circuit Short
05 In Car Temperature Sensor Circuit Open
06 In Car Temperature Sensor Circuit Shorted
07 Solar (Sun) Load Sensor Open
08 Solar (Sun) Load Sensor Shorted
09 Low Freon Detected
check the air mix actuators. They control temp. I'm also sending a htr control schematic that I found for your car. Good luck if you have other heater codes let me know I can look this stuff up again.
Monday, January 21st, 2013 AT 8:21 PM