With Nippondenso Compressor

Diagnostic Trouble Code (DTC) table Automatic climate control

The table lists all of the possible malfunctions and Diagnostic Trouble Codes (DTC) recognized by the A/C control head -E87-, and displayed and/or printed on the VAG 1551 sCan Tool.

Malfunctions stored in Diagnostic Trouble Code (DTC) memory are retained until erased.

If faulty components are indicated, check wiring and connections (terminals 75, 30, and 31) for open or short circuits according to wiring diagram before replacing the components.

After replacing a faulty component, carry out basic setting and check DTC memory.

Use VAG 1598 testbox and VAG 1598/11 and 1598/12 adapter cables for checking electrical connections to the A/C control head -E87-.

Sporadic malfunctions are identified with an SP on the right side of the VAG 1551 Scan Tool display.

The five-digit DTC is not displayed on the VAG 1551 Scan Tool, but only printed out via the printer.

If the A/C control head -E87- stays ON after the ignition is switched OFF, check the wiring from the A/C control head connector D, terminal 1 tor a short circuit to battery positive voltage (B+) according to the wiring diagram.

Notes:
Zexel A/C compressors have been installed from the start of production. During m.y. 1996, a new Nippondenso A/C compressor is installed as a running change on all vehicies with 6-cylinder engines.

The A/C control head -E87- must be coded for the specific vehicle application, including the type of A/C compressor installed (Zexel or Nippondenso).

Vehicles equipped with a Nippondenso compressor must have an A/C control head -E87- identified with index letter "K" or higher to allow for correct coding.

For correct part number and application of replacement A/C control head -E87-, see latest parts catalog.

On the Nippondenso compressor, the A/C compressor speed sensor -G111- has been eliminated. If this is not taken into consideration when coding the A/C control head -E87-, the A/C compressor will run only briefly and then be switched off again immediately, since no A/C compressor speed signal is received.

If a malfunction for A/C clutch -N25- is recognized on a vehicle with a Zexel compressor (with A/C compressor speed sensor -G111-), first check the wiring between the A/C control head -E87- and the sensor -G111-.

Diagnostic Trouble Code (DTC) table





DTC 00000 and 00529





DTC 00532 and 00600
1) Message will be displayed in addition to the appropriate component or information
2) If malfunction is present in sensor -G92-, temperature regulator flap motor -V68- can be manually adjusted by pressing the "+" or temperature button (display range between 0 ° - 50 °C (32 ° - 122 °F).





DTC 00601 and 00602
1) Message will be displayed in addition to the appropriate component or information





DTC 00603
1) Message will be displayed in addition to the appropriate component or information





DTC 00604 and 00624
1) Message will be displayed in addition to the appropriate component or information





DTC 00625 and 00779
1) Message will be displayed in addition to the appropriate component or information





DTC 00785 and 00786
1) Message will be displayed in addition to the appropriate component or information





DTC 00787 and 00799
1) Message will be displayed in addition to the appropriate component or information





DTC 00800
1) Message will be displayed in addition to the appropriate component or information





DTC 00801
1) Message will be displayed in addition to the appropriate component or information
2) If A/C refrigerant high pressure switch -F118- opens 30 times during one driving period (for example due to loose connections or excessive system pressure), compressor is switched OFF for remainder of driving period. Compressor can be switched ON again by pressing "Compressor ON/OFF" button. If this malfunction occurs repeatedly over several driving periods, compressor cannot be switched on again until DTC memory has been erased.





DTC 01270 (Part 1 of 3)
1) Malfunction type displayed in addition to the appropriate component or information.
2) If the malfunction cause Speed deviation too high is also displayed, repair the open or short circuit first.
3) Sensor -G111- has been eliminated and special A/C control head coding is required for Nippondenso A/C compressors installed as a running change during m.y. 1996.





DTC 01270 (Part 2 of 3)
1) Malfunction type disptayed in addition to the appropriate component or information.
2) If the malfunction cause "Open/Short circuit to B+" is also displayed, repair the open or short circuit first.
3) Sensor -G111- has been eliminated and special A/C control head coding is required for Nippondenso NC compressors installed as a running change during m.y. 1996.





DTC 01270 (Part 3 of 3)
1) Message will be displayed in addition to the appropriate component or information
2) If display for clutch -N25- indicates both "Open/Short circuit to B+" and "Speed deviation too high", repair cause for open/short circuit first.





DTC 01271 and 01272
1) Message will be displayed in addition to the appropriate component or information





DTC 01273
1) Message will be displayed in addition to the appropriate component or information