Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Big Stew on September 30, 2007, 08:47:36 PM

Title: Problems With Twin Climate on a Grand Cherokee
Post by: Big Stew on September 30, 2007, 08:47:36 PM

Has anyone had problems with the passenger side blowing cold all the time but the drivers side working as it should on a Grand Cherokee 1999?

Title:
Post by: Mike Pavelin on September 30, 2007, 09:23:50 PM

Could be the one of the blend air motors is faulty. Could also be a blend door has broken. If it has it's a total dash out job i'm afraid.

The system has a self diagnostic function. follow the instructions below to read off any fault codes.......


ENTERING THE AZC SELF-DIAGNOSTIC MODE

To enter the AZC self-diagnostic mode, perform the

following:

(1) Depress the A/C and Recirc buttons at the

same time and hold. Rotate the left temperature control

knob clockwise (CW) one detent.

(2) If you continue to hold the A/C and Recirc buttons

depressed, the AZC control module will perform

a Segment Test of the vacuum fluorescent (VF) display.

In the Segment Test you should see all of the

display segments illuminate as long as both buttons

are held. If a display segment fails to illuminate, the

vacuum fluorescent display is faulty and the heater-

A/C control must be replaced.

(3) After viewing the Segment Test, release the

A/C and Recirc buttons and the display will clear

momentarily.

If a 0 is displayed, then no faults Should there be any faults, all fault codes will displayed in ascending numerical sequence, whether current or historical.

Input faults 01 = IR thermister circuit open

02 = IR thermister circuit shorted

03 = Fan pot shorted

04 = Fan pot open

05 = Mode pot shorted

06 = Mode pot open

07 = IR sensor delta too large

08 = Reserved

09 = Reserved

10 = Reserved

11 = Engine air intake temperature Buss message

missing

12 = Country code Buss message missing

System Faults 13 = Mode motor not responding

14 = AI (Recirc) motor not responding

15 = Left temperature door not responding

16 = Right temperature door not responding

17 = Mode door travel range too small

18 = Mode door travel range too large

19 = AI (Recirc) door travel too small

20 = AI (Recirc) door travel too large

21 = Left temperature door travel too small

22 = Left temperature door travel too large

23 = Right temperature door travel too small

24 = Right temperature door travel too large

25 = Calibration check sum error

26 = Engine coolant temp bus message missing

27 = Vehicle speed bus message missing

28 = Engine RPM bus message missing

29 = OAT bus message missing

30 = Display intensity bus message missing

31 = VIN number bus message missing

32 = Reserved


Historical fault codes:

Input faults 33 = IR thermister circuit was open

34 = IR thermister circuit was shorted

35 = Fan pot was shorted

36 = Fan pot was open

37 = Mode pot was shorted

38 = Mode pot was open

39 = IR sensor delta was too large

40 = Reserved

41 = Reserved

42 = Reserved

43 = Engine air intake temperature Buss message

missing

44 = Country code Buss message missing

System Faults 45 = Mode motor was not responding

46 = AI (Recirc) motor was not responding

47 = Left temperature door was not responding

48 = Right temperature door was not responding

49 = Mode door travel range too small

50 = Mode door travel range too large

51 = AI (Recirc) door travel range too small

52 = AI (Recirc) door travel range too large

53 = Left temperature door travel too small

54 = Left temperature door travel too large

55 = Right temperature door travel too small

56 = Right temperature door travel too large

57 = Calibration check sum error

58 = Engine coolant temp bus message missing

59 = Vehicle speed bus message missing

60 = Engine RPM bus message missing

61 = OAT bus message missing

62 = Display intensity bus message missing

63 = VIN number bus message missing

64 = Reserved

65 = Reserved

66 = Reserved

67 = Reserved

Title:
Post by: greggmo on September 30, 2007, 09:54:49 PM

glad you put the short amswer on mike 8)

Title:
Post by: Big Stew on September 30, 2007, 09:55:23 PM

Many thanx will do the test tomorrow.

Title:
Post by: Big Stew on September 30, 2007, 10:04:53 PM

well just done it and it came up with 54 56 25 48 ????

Title:
Post by: Dave69 on October 01, 2007, 09:25:29 AM

now you know whats wrong you can fix it.

start with the number 48 right door not working could be a good idea

Title:
Post by: CrunchTyme on October 02, 2007, 03:46:50 AM

Dang Mike,

I was going to say that exact same thing ........................   I had to stop for a carpel tunnel rest break

Title:
Post by: Bubba on October 02, 2007, 07:15:58 PM

:?

Title:
Post by: Big Stew on October 02, 2007, 07:35:19 PM

Any one know a cheap sorce of spares i.e doors and motors or is it a case of jeep uk only, would really like the spares ready to put on as this is my only car and would need to get it back on the road asap after starting the job. Would it be viable to get a spare unit from a breakers rebuild it ready to fit and have a spare one there after ????

Title:
Post by: Dave69 on October 03, 2007, 01:41:50 AM

nothing wrong with having a few spares lying around, the downside is that it tends to escalate