|
|
Involves the wiring, blend-air door actuator, or the ATC control head. Involves the wiring, mode door actuator, or the ATC control head. Involves the wiring, blend-air door actuator, mode door actuator, fresh/recirc. door actuator, or the ATC Involves the wiring, fresh/recirc. door actuator, or the ATC control head. Involves the compressor circuit signal wiring, or the ATC control head. Involves the blower wiring, power module, or the ATC control head. Requires replacing the ATC control head. • DIAGNOSTIC TROUBLE CODES 9, and 27 Involves the wiring, sun sensor, or the ATC control head. Involves the wiring, water temperature sensor, or the ATC control head. Involves the wiring, ambient temperature sensor, or the ATC control head. Involves the wiring, in-car temperature sensor/aspirator, or the ATC control head. DIAGNOSTIC TROUBLE CODE SERVICE PROCE- The control keyboard will not function if pins 7, 9, 17, 19, or 20 of the 21-way wiring connector For electrical pin numbers, refer to the wiring Pin out charts (Figs. 1, 2, 3, 4, 5, or 6). DIAGNOSTIC TROUBLE CODE 1—OUTPUT (1) Remove pin #2 from 21-way connector on control and retest system. If code 01 does not appear, the Disconnect 21-way connector from control. With an ohmmeter, measure the resistance between pin #2 and Source of voltage on pin #2 is in the wiring. Repair and retest system. (2) Remove pin #13 from 21-way connector on con- trol and retest system. If code 01 does not appear, the (3) Remove pin #5 from 21-way connector on control and retest system. If code 01 does not appear, the (4) Remove pin #6 from 21-way connector on control and retest system. If code 01 does not appear, the (5) Remove pin #15 from 21-way connector on con- trol and retest system. If code 01 does not appear, the DIAGNOSTIC TROUBLE CODE 2—BLEND AC- If both Diagnostic Trouble Codes 2 and 3 occur simultaneously, do both procedures. There is (1) Disconnect terminal #6 on the ATC control 21- way connector and retest the system. Note that remov- (2) If Diagnostic Trouble Code 2 reappears, replace control. (3) If code 2 does not reappear, the problem is a shorted blend door actuator motor or a short to ground (4) Remove 21-way connector and check for continu- ity from pin #6 to chassis ground. There should not be (5) Check resistance across pins #6 and #4 of the 21-way for a shorted actuator motor. Resistance should DIAGNOSTIC TROUBLE CODE 3—MODE AC- If both Diagnostic Trouble Codes 2 and 3 occur simultaneously, do both procedures. There is (1) Disconnect terminal #5 on the ATC control 21- way connector and retest the system. Removing this (2) If Diagnostic Trouble Code 3 reappears, replace control. (3) If code 3 does not reappear, the problem is a shorted mode door actuator motor, or a short to ground (4) Remove 21-way and check for continuity from pin #5 to chassis ground. There should not be any continu- 24 - 74 HEATING AND AIR CONDITIONING Ä |