Iwantmymarkback
Well-Known LVC Member
Does anyone have the link, or know where I can find the self diacnostic for the A/C console for a mark viii?
Thanks
-Rick
Thanks
-Rick
Self Diagnostic
- Thread starter Iwantmymarkback
- Start date
driller
Dedicated LVC Member
Electronic Automatic Temperature Control Unit Self Test
1. Turn ignition switch to RUN position.
2. Push and release both OFF and FLOOR buttons simultaneously; then within two seconds, press and release the AUTO button.
3. Note: Display will be blank during testing.
After about 20 seconds, a code will appear in the window. Refer to the following Diagnostic Trouble Code Directory to identify the error for the proper diagnostic procedure:
01 Damaged EATC Module.
02 A/C air temperature control door cannot reach desired position.
03 Automatic temperature control sensor open.
04 A/C ambient air temperature sensor and bracket
05 A/C sunload sensor short.
1. Turn ignition switch to RUN position.
2. Push and release both OFF and FLOOR buttons simultaneously; then within two seconds, press and release the AUTO button.
3. Note: Display will be blank during testing.
After about 20 seconds, a code will appear in the window. Refer to the following Diagnostic Trouble Code Directory to identify the error for the proper diagnostic procedure:
01 Damaged EATC Module.
02 A/C air temperature control door cannot reach desired position.
03 Automatic temperature control sensor open.
04 A/C ambient air temperature sensor and bracket
05 A/C sunload sensor short.
Iwantmymarkback
Well-Known LVC Member
Thank you for getting this for me, but I have an error message of 155, and that doesnt seem to be on the list.
-Rick
-Rick
driller
Dedicated LVC Member
Must be different on a Gen2 then. 
driller
Dedicated LVC Member
MaloriaN said:
Error Code 02 = A/C air temperature control door cannot reach desired position.
PINPOINT TEST B: EATC CONTROL ASSEMBLY CONNECTOR AND BLEND DOOR ACTUATOR DIAGNOSIS
B2 CHECK EATC CONTROL OPERATION
l Disconnect both connectors from EATC control assembly and drive actuator in both directions using any 9-12 volt battery. The following pins can be jumped to utilize the vehicle battery. Ensure the ignition is in the RUN position. All pins are located on the LH side connector.
-- Trial 1: Pin 24 (57, BK) to Pin 22 (249 DB/LG)
-- Trial 2: Pin 24 (57, BK) to Pin 21 (250 O)
l Is actuator driven in both directions?
On-Board Diagnostic DTC 03 (Warm Air Discharge at 65°F or Cool Air Discharge at 85°F).
Possible Source(s):
§ Sensor open or shorted.
Action(s) to Take:
§ Disconnect wire harness connector at in-vehicle temperature sensor. Measure resistance across sensor terminals and compare with specifications in the following In-Vehicle Sensor Resistance Table. If resistance is out of specifications, replace sensor. If sensor is ok, proceed to "Wire harness open or shorted".
Possible Source(s):
§ Wire harness open or shorted.
Action(s) to Take:
§ Disconnect battery cables. Disconnect wire harness connector from sensor and disconnect both connectors from EATC control assembly. Check for continuity and for possible shorting between the two wires (Pin 2 (470 PK/BK) and Pin 17 (790 W/O)). Service as necessary. Reconnect wire harness and battery cables.