NOTE:Diagnostic Trouble Codes (DTCs) should be diagnosed and repaired before proceeding with any other tests. DTCs can be retrieved using A/C-heater control unit. If no DTCs are set, diagnose problem by symptom, see appropriate test under TROUBLE SHOOTING.
RETRIEVING DIAGNOSTIC TROUBLE CODES
If a fault has occurred in a monitored circuit, the MAN symbol on right side of A/C-heater control unit display will flash during first 2 minutes of operation. To enter diagnostic mode, turn ignition on, then press both temperature ****s simultaneously for 5 seconds.
There are 2 display modes within self-diagnostics: diagnostic pointer and diagnostic value. By rotating driver's temperature ****, one detent in either direction, display is toggled between pointer and value.
Value displayed is decimal equivalent of Random Access Memory (RAM) contents. A "2" is formed using minus sign, and leading "1" in order to display values over 199. Diagnostic pointer mode is identified by a minus sign preceding pointer number. Pointer provides an index, identifying corresponding diagnostic value.
DTCs reside under diagnostic pointer 00. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. Pointer will be set to this position upon initial entry into self-diagnostics. If more than one DTC is present, they will be displayed sequentially at a rate of 2-second intervals per fault. Rotating passenger temperature **** will switch self-diagnostic pointers.
A wraparound feature is provided if pointer is continued past either end. Other data used by computer resides under different self-diagnostic pointers and may not be useful in diagnosing A/C-heater system. To exit diagnostics, press any mode button.
NOTE:A 2-digit DTC indicates fault is current. A 3-digit DTC indicates fault is intermittent.
DIAGNOSTIC TROUBLE CODE IDENTIFICATION
00No Faults Found
01 Or 101In-Vehicle Air Temperature Sensor Shorted To Ground
02 Or 102In-Vehicle Air Temperature Sensor Circuit Open
03 Or 103Outside Air Temperature Sensor Shorted To Ground
04 Or 104Outside Air Temperature Sensor Circuit Open
DTC 05 Or 105Left-Side Temperature Valve Actuator Shorted Or Open
DTC 06 Or 106Right-Side Temperature Valve Actuator Shorted Or Open
07 Or 107Serial Data (Class II) Line Open
08 Or 108Sun Load Temperature Sensor Circuit Open
01, 03 & 08; 02 & 04Multiple Codes Displayed
CLEARING DIAGNOSTIC TROUBLE CODES
After a repair is completed, DTCs must be cleared from memory to ensure proper system operation. To clear memory, press A/C mode button.
Tuesday, July 5th, 2011 AT 4:42 AM