| All values measured to ground unless otherwise noted | |||
| N3/10 | |||
| C.28 | Air pump activation signal output | Disconnect ECT sensor and connect 2.5 KOhms resistor across pin 1 and 4 of B11/4 plug engine at idle, measure to circuit 87 pin A.2 12 VDC while pump is running (approx. 2 min) |
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| D.3 | Starter activation ground signal output, energizes relay K40/4k2 | Ignition on 0 VDC 12 VDC when starter turning |
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| E.1 | Injector 2 (engine 112) or 6 (engine 113) timing signal output controls fuel injection quantity (pulse width determines fuel quantity wider pulse = more fuel) |
Use scope, probe tip to pin A.2 (circuit 87), gnd to pin E.1 ECT 20 °C start engine approx. t=8 msec. ECT 80 °C engine at idle approx.. t=2.7-4 msec. accelerate briefly approx. t=14 msec. |
Waveform needle pulse approx. 40 Vpp, coil resistance 14-17 Ohms |
| E.2 | Injector 3 (113) or 5 (112) timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 ground to pin E.2, same as pin E.1 | |
| E.3 | Injector 7 (113 only) timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 ground to pin E.3, same as pin E.1 | |
| E.4 | Injector 8 (113 only) timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 ground to pin E.4, same as pin E.1 | |
| E.5 | EGR valve ground signal output | Connect vacuum tester. Engine at idle and ECT > 60 °C: < 1 VDC and < 10 mbar drive vehicle on rollers or road at approx. 3000 rpm: 1-7 VDC and 80-220 mbar |
 Use two technicians for road testing |
| E.6-9 | Pins not used | ||
| E.10 | Air pump switchover valve activation signal output | Ignition on, 0.4-0.6 A current draw | |
| E.11 | Pin not used | ||
| E.12 | Resonance intake manifold s/o valve activation signal output | Ignition on, 0.4-0.6 A current draw Measure to pin A.2 (circuit 87) engine < 3500 rpm < 1 VDC engine > 3500 rpm 12 VDC |
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| E.13 | Injector 3 (112) or 4 (113) timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 ground to pin E.2, same as pin E.1 | |
| E.14 | Injector 6 (112) or 2 (113) timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 ground to pin E.14, same as pin E.1 | |
| E.15 | Oil level recognition sensor power output | Ignition on, approx. 5 VDC to pin E.16 (-) | |
| E.16 | Oil level recognition sensor ground | Ignition on, approx. 5 VDC to pin E.15 (+) approx. 0 Ohms to ground |
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| E.17 | Oil level recognition signal input, displays message on A1p13 when oil level is low | Ignition on, oil level: OK 12 VDC low <1 VDC |
Feed to A1p13 via CAN |
| E.18-21 | Pins not used | ||
| E.22 | Pressure sensor power output | Ignition on, approx. 5 VDC to pin E.24 (-) | |
| E.23 | Pressure sensor signal input | Ignition on > 3.5 VDC engine at idle < 2 VDC connect vacuum tester > 500 mbar |
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| E.24 | Pressure sensor ground signal output | Ignition on, approx. 5 VDC to pin E.22 (+) | |
| E.25 | Injector 1 timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 (circuit 87) ground to pin E.25 same as pin E.13 |
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| E.26 | Injector 4 (112) or 5 (113) timing signal output controls fuel injection quantity |
Use scope, probe tip to pin A.2 ground to pin E.26, same as pin E.1 | |
| E.27 | Pin not used | ||
| E.28 E.29 |
ECT sensor signal input, low side ECT sensor signal input, high side |
Ignition on, measure to pin E.29 (+) ECT at: 20 °C approx. 3.4 VDC 60 °C approx. 1.5 VDC 100 °C approx. 0.5 VDC |
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| E.30 | Pin not used | ||
| E.31 | EA/CC/ISC potentiometer 1 signal input, determined by accelerator pedal position | Ignition on, measure to pin E.32 (-) accelerator pedal position CTP 4.0-4.6 VDC, WOT < CTP value |
P/O M16.6 see also pins F.1-F.2 |
| E.32 E.33 |
EA/CC/ISC potentiometer 1 and 2 power output, low side high side |
Ignition on approx. 5 VDC across pins |
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| E.34 | EA/CC/ISC potentiometer 2 signal input determined by accelerator pedal position | Ignition on, measure to pin E.32 (-) accelerator pedal position CTP 0.3-0.9 VDC, WOT > CTP value |
P/O M16.6 see also pins F.1-F.2 |
| E.35,36 | Pins not used | ||
| E.37 E.38 |
CKP sensor signal input low side CKP sensor signal input high side CKP status affects injection system timing |
Start engine > 2.5 VAC, at idle > 5 VAC voltage raises with increasing rpm or use scope: sine wave 30 Vpp, t=0.7 msec. at idle |
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| E.39 E.40 |
Camshaft sensor ground Camshaft sensor signal input camshaft signal affects injection system timing |
Engine at idle 1.2-1.7 VDC (value alternates) or use scope square wave approx. 12 Vpp, duty cycle 80 % |
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| E.41 E.42 |
Knock sensor 1 signal input low side Knock sensor 1 signal input high side (affects ignition system timing if "knock" is detected) |
Ignition on, use oscilloscope tap on engine block see signal vary (looks like noise) |
Piezo element generates increasing voltage with increasing knock signal |
| E.43 E.44 |
Knock sensor 2 signal input low side Knock sensor 2 signal input high side |
Same as pins E.41 and E.42 | |
| E.45 | IAT sensor signal, reference voltage input | Ignition on, measure to pin E.48 20 °C 2.7 VDC. 40 °C 1.8 VDC, 60 °C 1.1 VDC |
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| E.46 | Hot film MAF sensor, power supply output | Disconnect B2/5, measure to pin E.48 ignition on 5 VDC |
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| E.47 | Hot film MAF sensor signal input | Ignition on, measure to pin E.48 0.9-1.1 VDC engine at idle, ECT > 70 °C 1.3-1.7 VDC voltage raises with increasing rpm |
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| E.48 | MAF sensor common ground (reference point for 5 V and 12 V supply) |
Disconnect B2/5, measure to B2/5 connector pin 2 Ignition on 12 VDC | |
| F.1 F.2 |
EA/CC/ISC actuator motor control signal output low side high side |
Ignition on, 0.8-2.3 VDC Engine at idle, ECT > 70 °C voltage varies from 1.0-2.5 VDC Ignition off, approx. 10 Ohms |
P/O M16/6 see also pins E.31-E.34 |
| F.3 | Pin not used | ||
| F.4 | Ignition coil 5b (112) or 3b (113) signal output | Ignition on 12 VDC Starter cranks > 10 VDC (voltage drops slightly during cranking) |
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| F.5 | Ignition coil 5a (112) or 3a (113) signal output | Same as pin F.4 | |
| F.6 | Ignition coil 3a (112) or 4a (113) signal output | Same as pin F.4 | |
| F.7 | Ignition coil 3b (112) or 4b (113) signal output | Same as pin F.4 | |
| F.8 | Main ground to W16/6 | Approx. 0 Ohms to ground | |
| F.9 | Ignition coil 8b (113 only) signal output | Same as pin F.4 | |
| F.10 | Ignition coil 8a (113 only) signal output | Same as pin F.4 | |
| F.11 | Ignition coil 7b (113 only) signal output | Same as pin F.4 | |
| F.12 | Ignition coil 7a (113 only) signal output | Same as pin F.4 | |
| F.13 | Ignition coil 4a (112) or 5a (113) signal output | Same as pin F.4 | |
| F.14 | Ignition coil 4b (112) or 5b (113) signal output | Same as pin F.4 | |
| F.15 | Main gound to W16/6 | Approx. 0 Ohms to ground | |
| F.16 | Ignition coil 2b (112) or 6b (113) signal output | Same as pin F.4 | |
| F.17 | Ignition coil 2a (112) or 6a (113) signal output | Same as pin F.4 | |
| F.18 | Ignition coil 6b (112) or 2b (113) signal output | Same as pin F.4 | |
| F.19 | Ignition coil 6a (112) or 2a (113) signal output | Same as pin F.4 | |
| F.20 | Ignition coil 1a signal output | Same as pin F.4 | |
| F.21 | Ignition coil 1b signal output | Same as pin F.4 | |
| Note 1 | Input programmable - version coding - idle speed rpm adjustment - wheel perimeter adjustment - basic initial adjustment - DAS Code programming |
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