Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

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

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

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

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

For an entrance in 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 a temperature mode. Thus will join all screen of the display (segmentary check) (will light up).

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

Now press one (any) of mentioned above buttons. On the screen there should be a figure representing the sitting person that speaks about the entrance in diagnostics mode. If in memory are stored 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 to further checks it is necessary to 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 taking place earlier and self-liquidated malfunctions both buttons on the panel are necessary to squeeze out and to hold them pressed during not less than 3 seconds. Emergence testifies to deleting of codes on the screen of the display of two horizontal hyphens.

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

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