Notes Regarding Readout of Diagnostic Module

On-board Diagnostics II (OBD II) (Diagnostic Module [N59/1]) uses two different plug connectors for diagnostic trouble code (DTC) readout:

- 16-pole diagnostic module (OBD II) generic scan tool connector (X11/22) using a generic scan tool,
- 38-pole data link connector (X11/4) using the HHT.


NOTE: DTC readout using the impulse counter scan tool or via the LED push-button switch has been eliminated. Readout is only possible with the HHT or a generic OBD II scan tool.


During DTC readout, the CHECK ENGINE Malfunction indicator lamp (MIL) stays on continuously.

Notes Regarding Diagnostic Trouble Codes (DTC's)

The retained diagnostic trouble code (DTC) memory feature of the diagnostic module has been replaced with DTC memory which is cleared after disconnecting the vehicle's battery.


Notes Regarding DTC Readout Using Generic Scan Tool

In case of DTC P0131 and P0133, the exact cause of the fault in oxygen sensor 1 (O2S 1) can be read via "MODE 5" with the generic scan tool. To do so, the following codes must be entered in the generic scan tool:

- DTC P0131: Code JD 4A HEX
- DTC P0133: Code JD 7E HEX


Layout of Diagnostic Module Generic Scan Tool Connector (OBD II, X11/22)





1 -
2 -
3 -
4 Ground (W1)
5 Ground (W15/1)
6 -
7 Diagnostic Wire
8 -
9 -
10-15 -
16 Voltage Supply, Circuit 30