Jeep Grand Cherokee

1993-1999 of release

Repair and operation of the car



Jeep Grand Cherokee
+ Cars of the Jeep Grand Cherokee brand
+ Settings and routine maintenance
+ Line six-cylinder engine
+ V8 engine
+ Procedures of the general and capital repairs of the engine
- Cooling systems, heating and air conditioning
   General information
   Antifreeze - the general information
   Check of functioning and replacement of the thermostat
   Check of serviceability and replacement of the fan of the cooling system and coupling of its coupling
   Check of functioning and replacement of the block of the sensor of temperature of a cooler
   Removal and installation of a radiator and broad tank of the cooling system
   Check of functioning of the water pump
   Removal and installation of the water pump
   Check of serviceability of an electric contour and replacement of components of the motor of the fan of a heater and conditioner of air
   Removal and installation of the block of the fan of a heater
   Removal and installation of assembly of management of a heater and conditioner of air
   Removal and installation of the heat exchanger of a heater
   Check of serviceability and service of systems of heating and air conditioning
   Diagnostics of system of automatic control of temperature (automatic telephone exchange) without its removal from the car
   Removal and installation of the accumulator (store) of the air conditioning system
   Removal and installation of the compressor of the air conditioning system
   Removal and installation of the condenser of the air conditioning system
   Removal and installation of a tube of the calibrated jet
   Removal and installation of the evaporator of air conditioning system
+ A power supply system and production of the fulfilled gases
+ System of electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of gear shifting
+ Automatic transmission
+ Transfer case
+ Coupling and transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of onboard electric equipment
+ Governing bodies and methods of operation



Diagnostics of system of automatic control of temperature (automatic telephone exchange) without its removal from the car

Diagnostics of serviceability of functioning of system of automatic telephone exchange is impossible at the disconnected battery. If you for any reason are going to switch-off the battery, before make this check.

Some of models of cars of the Jeep Grand Cherokee brand are equipped with system of automatic control of temperature (automatic telephone exchange) which part also digital indicator (display) which is built in in the dashboard is. The system allows to make shipboard (without removal from the car) diagnostics of malfunctions of its entrance and output contours and to define as current, the refusals which were so taking place earlier. Are meant by the refusals taking place earlier such which withdrew at the moment, they usually result from violation of the quality of electric contacts which occurred during performing procedures of service of any other components.

The control panel of system of automatic telephone exchange (below) in comparison with the standard manual panel equipped with three rotating switches (above).

The same part of a working surface of the screen of the display which serves for indication of temperature works in the diagnostic mode.

The top left part of the screen of the display which is usually serving for indication of temperature (two figures) in the mode of diagnostics of malfunctions of system (it is shown in the drawing - there is no arrow indicating to the little man (see an illustration above)) serves for removal of codes of malfunctions (with 0 on 99).

If in system of automatic telephone exchange there is any failure, on the display every time at inclusion of ignition appears (once lights up) the error message ("ER").

For an entrance to diagnostics mode at the same time squeeze out the EXPERT and RECIRC buttons and, holding them pressed, turn on one click clockwise the handle of management of temperature condition. At the same time will join all screen of the display (segmentary check) (will light up).

After an otpuskaniye of buttons in the left part of the screen the digital 00 code (the choice of level of check) will appear.

Now press one (any) of the buttons mentioned above. On the screen there has to be a figure representing the sitting person that speaks about an entrance to diagnostics mode. If are stored in memory any of 64 (with 1 on 64) malfunction codes, they will be displayed. Write down the highlighted codes and verify them with the card of malfunctions (see the table below), revealing the sites of system needing more detailed check. In case of existence of codes with 25 on 29 before starting further checks should replace the module of management of automatic telephone exchange.

Codes of the current refusals will be erased in process of introduction of corrections. For removal of codes of the malfunctions taking place earlier and self-destructing it is necessary to squeeze out both buttons on the panel and to hold them pressed during not less than 3 sec. Deleting of codes is demonstrated by emergence on the screen of the display of two horizontal hyphens.

Diagnostics of system of automatic telephone exchange allows to reveal malfunctions of both entrance, and output its contours. However, if the amateur mechanic cannot find the reason taking place in the database of codes of malfunctions (see the card of codes below), authors of the Guide recommend to the owner of the car to address for consultation and the help in dealer office.

Card of codes of shipboard diagnostics of system of automatic control of temperature (automatic telephone exchange)

Malfunction code

Description of malfunction

The place in a contour

0
there are no refusals Normal functioning
1
break in a contour Sensor of ambient temperature
2
break in a contour Temperature sensor in interior of the car
3
break in a contour Entrance contour of the photo diode
4
break in a contour Entrance of the fan of the forward control panel of the fan
5
break in a contour Entrance of management of the mode of the forward panel
6
break in a contour Contour of feedback of the mixing air gate
7
break in a contour Contour of feedback of the gate of the modes
8
too high feedback Contour of power supply of the fan of the heater/fan
9
short circuit in a contour Sensor of surrounding temperature
10
short circuit in a contour Temperature sensor in interior of the car
11
short circuit in a contour Entrance contour of the photo diode
12
short circuit in a contour Entrance of the fan of the forward control panel of the fan
13
short circuit in a contour Entrance of management of the mode of the forward panel
14
short circuit in a contour Contour of feedback of the mixing air gate
15
short circuit in a contour Contour of feedback of the gate of the modes
16
too low feedback Contour of power supply of the fan of the heater/fan
17
error of switching of an entrance PWD impulse width entrance
19
the gate does not react Contour of feedback of the gate of the modes
20
the gate does not react Contour of the drive of the actuation mechanism of the mixing air gate
21
too gate low speed Contour of feedback of the gate of the modes
22
the gate course is too big Contour of feedback of the gate of the modes
23
too gate low speed Contour of the drive of the actuation mechanism of the mixing air gate
24
the gate course is too big Contour of the drive of the actuation mechanism of the mixing air gate
25
error of data of calibration These calibrations and CPU
26
loss of the message on cooler temperature Entrances of definition of collisions of C2D BUS
27
loss of the message on the speed of the movement of the car Entrances of definition of collisions of C2D BUS
28
loss of the message on engine turns Entrances of definition of collisions of C2D BUS
29
CPU mistake These calibrations and CPU
33
the break of a contour took place Sensor of ambient temperature
34
the break of a contour took place Temperature sensor in interior of the car
35
the break of a contour took place Entrance contour of the photo diode
36
the break of a contour took place Entrance of the fan of the forward control panel of the fan
37
the break of a contour took place Entrance of management of the mode of the forward panel
38
the break of a contour took place Contour of feedback of the mixing air gate
39
the break of a contour took place Contour of feedback of the gate of the modes
40
too high feedback Contour of power supply of the fan of the heater/fan
41
short circuit in a contour took place Sensor of ambient temperature
42
short circuit in a contour took place Temperature sensor in interior of the car
43
short circuit in a contour took place Entrance contour of the photo diode
44
short circuit in a contour took place Entrance of the fan of the forward control panel of the fan
45
short circuit in a contour took place Entrance of management of the mode of the forward panel
46
short circuit in a contour took place Contour of feedback of the mixing air gate
47
short circuit in a contour took place Contour of feedback of the gate of the modes
48
too low feedback Contour of power supply of the fan of the heater/fan
49
the error of switching of an entrance took place PWD impulse width entrance
51
the gate did not react Contour of feedback of the gate of the modes
52
the gate did not react Contour of the drive of the actuation mechanism of the mixing air gate
53
the course of the gate was too small Contour of feedback of the gate of the modes
54
the course of the gate was too big Contour of feedback of the gate of the modes
55
the course of the gate was too small Contour of the drive of the actuation mechanism of the mixing air gate
56
the course of the gate was too big Contour of the drive of the actuation mechanism of the mixing air gate
57
the error of calibration data took place These calibrations and CPU
58
loss of the message on cooler temperature took place Entrances of definition of collisions of C2D BUS
59
loss of the message on the speed of the movement of the car took place Entrances of definition of collisions of C2D BUS
60
loss of the message on engine turns took place Entrances of definition of collisions of C2D BUS
61
CPU mistake took place These calibrations and CPU