| All values measured to ground unless otherwise noted | |||
| X11/4 | |||
| 1 | Main ground to W16/6 | Approx. 0 Ohms to ground | |
| 2 | Circuit 15, unfused power output | 12 VDC with ignition on | Feed from Z7/48 |
| 3 | Circuit 30z power output to diagnostic socket | 12 VDC at all times | Feed from battery, fuse protected by K40/4f1 |
| 4 | ME-SFI ECM activation diagnostic output | 11-14 VDC with ignition on | Note 1 Feed from N3/10 (C.39) |
| 5 | Data link to ME-SFI ECM for DTC readout and coding | No reliable test | Note 1 |
| 6 | Traction system ECM diagnostic output | Ignition on 12 VDC | Feed via K40/4. Use SDS to test |
| 7 | Pin not used | ||
| 8 | "Diagnostic port" for DTC readout and diagnostic purpose (Brake Assist, N48) | Ignition on 1 - 2 VDC | To be tested with HHT refer to D.M. |
| 9 | Pin not used | ||
| 10 | ETC ECM diagnostic output | 8-14 VDC with ignition on | |
| 11 | Pin not used | ||
| 12 | Electronic selector lever ECM diagnostic output | No reliable test. Check continuity of wiring | Use SDS to test |
| 13 | TN signal output | 7.5-9.0 VDC with engine at idle | Note 1 Feed from N3/10 (C.38) |
| 14 | Pin not used | ||
| 15 | Data link to IC ECM for DTC readout and coding | No reliable test. Check continuity of wiring | Use SDS to test |
| 16 | Data link to A/C ECM for DTC readout and coding | Ignition on 12 VDC | Feed via K40/2. Use SDS to test |
| 17-19 | Pins not used | ||
| 20 | "Diagnostic port" for DTC readout and diagnostic purpose N73 | No reliable test | To be tested with HHT |
| 21-23 | Pins not used | ||
| 24 | "Diagnostic port" for DTC readout and diagnostic purpose | No reliable test | |
| 25-27 | Pins not used | ||
| 28 | DTC diagnostic output to PTS. Also input for HHT data and tests. | Ignition on approx. 9-14 VDC | |
| 29 | Pin not used | ||
| 30 | Data link to SRS ECM for DTC readout and coding | No reliable test. Check continuity of wiring | Use SDS to test |
| 31 | Pins not used | ||
| 32 | Data link to Navigation ECM for DTC readout and coding | Use SDS to test | |
| 33 | Data link to radio ECM for DTC readout and coding | No reliable test. Check continuity of wiring | Use SDS to test |
| 34 | Data link to COMAND ECM for DTC readout and coding | No reliable test. Check continuity of wiring | Use SDS to test |
| 35 | Data link to headlamp range adjustment ECM for DTC readout and coding | No reliable test. Check continuity of wiring | Use SDS to test |
| 36-38 | Pins not used | ||
| X11/22 | |||
| 1-3 | Pins not used | ||
| 4 | Ground to W16/4 | Approx. 0 Ohms to ground | |
| 5 | "Diagnostic port" Engine rpm signal output processed in ECM |
Engine at idle approx. 7.5-9 VAC or square wave 12 Vpp, ratio 50 % Approx. 1200 Hz (varies with engine rpm) |
|
| 6 | Pin not used | ||
| 7 | Engine ECM activation diagnostic output | Same as X11/4 pin 4 | Feed via Z7 |
| 8-15 | Pins not used | ||
| 16 | Circuit 30z power output to diagnostic socket | Same as X11/4 pin 3 | Feed via Z4/4 |
| Note 1 | Refer to D. M. Engines Vol. 4, 9.2 | ||