Automatic A/C - Diagnosis, Replacement Information

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Bulletin: 91-1-9

Date: June '91

Ref. No.: 91-203-1

Corp. Ref. No.: 131202R


SUBJECT:
SERVICE MANUAL UPDATE SECTION - 1C1 AUTOMATIC A/C DIAGNOSIS
(REPLACEMENT INFORMATION)

MODELS AFFECTED:
1991 ROADMASTER WAGONS AND 1992 ROADMASTER SEDANS
WITH AUTOMATIC AIR CONDITIONING (OPTION C68)


SERVICE MANUAL UPDATE - SECTION 1C1

The following information replaces existing text in the 1991 Roadmaster Service Manual and the 1992 Roadmaster Preliminary Service Manual for Automatic Air Conditioning (C68).

Please note your copy of the Service Manual accordingly.





AUTOMATIC AIR CONDITIONING C68 DIAGNOSIS AND INDEX





Air Conditioning Temperature Control (C68) Wiring Diagram





Air Conditioning Compressor Control (C68) Wiring Diagram





FAULT CODE 01-TEMPERATURE AIR VALVE ACTUATOR MOTOR POTENTIOMETER FEEDBACK OPEN





FAULT CODE 02-TEMPERATURE AIR VALVE ACTUATOR MOTOR POTENTIOMETER FEEDBACK SHORT





FAULT CODE 03-OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT OPEN





FAULT CODE 04-OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT SHORT





FAULT CODE 05-INSIDE AIR TEMPERATURE SENSOR CIRCUIT OPEN.





FAULT CODE 06-INSIDE AIR TEMPERATURE SENSOR CIRCUIT SHORT





FAULT CODE 07-SUN LOAD SENSOR CIRCUIT OPEN





FAULT CODE 08-SUN LOAD SENSOR CIRCUIT SHORT





FAULT CODE 09-LOW FREON DETECTED





FAULT CODE 10-UNIVERSAL ASYNCHRONOUS RECEIVER TRANSMITTER (UART) FAILURE