A/C - Corrected Trouble Codes and Diagnostic Text

9219oldsmobile04

NUMBER:
90-T-87

CORP.REF.NO:
038107

DATE:
April 1990

SECTION:
1C and 8A


SUBJECT
SERVICE MANUAL UPDATE - SECTION 8A-68 A/C C68
AIR DELIVERY - TEMPERATURE CONTROLS
(CODES/DIAGNOSTIC TEXT)

MODELS/YEARS
1989-90 CUTLASS SUPREME


Note:
This TSB has been corrected by TSB # 90T87A dated 1/91.

The trouble codes and diagnostic text found in Section 8A-68 are incorrect. Please make a reference to this bulletin in your copies of the 1989 and 1990 Cutlass Supreme Service Manuals.





ON-BOARD DIAGNOSTIC MODE TROUBLESHOOTING HINTS AND SYSTEM DIAGNOSIS





TEMPERATURE SENSOR TEST AIR TEMPERATURE DOOR MOTOR TEST





AIR TEMPERATURE DOOR MOTOR TEST (TABLE 2) SERIAL DATA LINE TEST





HEATER AND A/C CONTROL ASSEMBLY VOLTAGE TEST SOLENOID TEST





CIRCUIT OPERATION