| All values measured to ground unless otherwise noted | |||
| N3/4 | |||
| 1.1-3 | Pins not used | ||
| 1.4 | Fuel cut off signal input, generated from EA/CC/ISC actuator |
Ignition on 2.2 - 11 VDC | Feed from M16/1 or M16/2 |
| 1.5 | Ground signal output jumper to pin 6 | Approx. 0 Ohms between pin 5 and 6 | |
| 1.6 | Ground signal input jumper from pin 5 | ||
| 1.7-8 | Pins not used | ||
| 1.10 | ICS signal input from CC/EA system, determined by setting of M16/1 or M16/2 | Ignition on, acceleration pedal position: CTP < 4.8 VDC WOT > 5.5 VDC |
|
| 1.11-14 | Pins not used | ||
| 1.15 | 02S 1 signal output to diagnostic 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 |
| 1.16 | 02S 2 signal output to diagnostic module | Engine at idle ECT > 80 °C measure to pin 24 >450 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 |
| 1.17 | CMP sensor signal output to diagnostic module | Engine at idle 1.3 - 1.7 VDC (value alternates) | generated by B6/1 |
| 1.18 | Rpm signal output, controls (EA/)CC/ISC system and tachometer A1p5 | Engine at idle 5.0 - 7.5 VDC | |
| 1.19 | "Diagnostic port" for DTC readout and diagnostic purpose | Ignition on 12 VDC | To be tested with HHT refer to D.M. |
| 1.20 | Pin not used | ||
| 1.21 | Circuit 50 starter signal recognition input | Gear range selector in pos P or N key held in starting position 12 VDC |
|
| 1.22-23 | Pins not used | ||
| 1.24 1.25 |
02S signal input, low side 02S signal input, high side |
Engine at 2000-3000 rpm for at least 2 min. ECT >80 °C >550 mVDC across pin 24 and 25 |
|
| 1.26 | Shield for 02S signal | Approx. 0 Ohms to ground | |
| 1.27 | Circuit 87 switched power input, switched by relay K1 | Ignition on 12 VDC | |
| 1.28 | Pin not used | ||
| 1.29 | Fuel pump activation signal output, activates relay K27 | 6-12 VDC during start procedure | |
| 1.31 | 02S heater activation (after TWC) to heater relay K35 | Ignition on approx. 0.1-0.3 A current draw. ECT<25 °C measure to circuit 87 pin 27 12 VDC |
|
| 1.32 | Main ground to W16/4 | Approx. 0 Ohms to ground | |
| 1.33 | Main ground to W16/6 | Approx. 0 Ohms to ground | |
| 1.37-38 | Pins not used | ||
| 1.39 | Circuit 87 switched power input, switched by relay K1 | Ignition on 12 VDC | |
| 1.40 | Circuit 30 main power input | 12 VDC at all times | |
| 1.41 | O2S heater activation signal (after TWC) | Same as 1.30 | |
| 1.43 | Purge control signal output switched ground activates purge valve | Ignition on, approx. 0.2-0.3 A current draw Engine at idle for at least 1 min. Valve must recognizably cycle |
|
| 1.44 | Ground signal to diagnostic module | ||
| 3.H | CAN-Bus (high side). High speed data transfer bus input and output, shares data with other ECMs | No reliable test. Check continuity to other ECMs approx. 5 VAC when data is on bus. |
HHT is also used for CAN diagnosis |
| 3.L | CAN-Bus (low side). high speed data transfer bus input and output, shares data with other ECMs | ||