| All values measured to ground unless otherwise noted | |||
| N59/1 | |||
| 1.1 | Sensor common ground output, from engine control module | Approx. 0 Ohms to ground or measure to circuit 30 12 VDC |
see also pin 1.7 |
| 1.2 | Main ground to W16/4 | Approx. 0 Ohms to ground or measure to circuit 30 12 VDC |
|
| 1.3 | Circuit 87 power input from K1 | Ignition on 12 VDC | |
| 1.4 | Circuit 30 main power input | 12 VDC at all times | |
| 1.5 | Pin not used | ||
| 1.6 | "Diagnostic port" for DTC readout and diagnostic purpose | Ignition on 12 VDC | To be tested with HHT refer to D.M. |
| 1.7 | Sensor common ground output, from engine control module | Approx. 0 Ohms to ground or measure to circuit 30 12 VDC |
see also pin 1.1 |
| 1.8 | Pin not used | ||
| 1.9 | Check Engine MIL switched ground signal output | Ignition on 12 VDC < 1 VDC when malfunction occurs |
|
| 1.10 | Pin not used | ||
| 1.11 | 02S 2 signal input, from engine control module | Engine at idle ECT >80 °C measure to pin 31 >550 mVDC Raise to 2000-3000 rpm for at least 3 min until 02S heater switches to on, then accelerate briefly voltage changes >100mVDC |
generated by G3/1 |
| 1.12 | Purge flow switchover valve activation output | Ignition on, approx. 0.4-0.6 A current draw Engine at idle for at least 1 min. purge valve Y58/1 must recognizably cycle |
|
| 1.13 | Pin not used | ||
| 1.14 | 02S 1 signal input, from engine control module | Engine at idle for at least 2 min. ECT > 80 °C Voltage varies more than 0.3 VDC in a range from - 0.2 to + 1.0 VDC |
generated by G3/2 |
| 1.15 | Ground from from engine control module | ||
| 1.16 | Pin not used | ||
| 1.17 | "Diagnostic port" for DTC readout and diagnostic purpose | Ignition on 12 VDC | To be tested with HHT refer to D.M. |
| 1.18 | Pressure sensor voltage input | Ignition on > 3.5 VDC, engine at idle < 2 VDC connect vacuum tester > 500 mbar |
|
| 1.19 | Engine rpm signal output | Engine at idle approx. 7.5-9 VAC or square wave 12 Vpp, ratio 50 % Approx. 1200 Hz |
|
| 1.20 | CMP sensor signal input, from engine control module | Engine at idle 9.5-11.0 VDC (value alternates) or use scope square wave approx. 10 Vpp, duty cycle 80 % |
generated by L5/1 |
| 1.21 | Pin not used | ||
| 1.22 | Pressure sensor voltage supply output | Ignition on, approx. 5 VDC to pin 2 (-) | |
| 2.L | CAN Class C bus (low side). High speed data transfer bus input and output, exchanges data with other ECMs | No reliable test. Check continuity to other ECMs. Approx. 5 VAC when data is on bus | Also ECMs can cause CAN-Bus DTCs |
| 2.H | CAN Class C bus (high side). High speed data transfer bus input and output | ECM internal resistance with plugs disconnected Pins 3.H and 3.L approx. 120 Ohms |
HHT is also used for CAN diagnosis |