| All values measured to ground unless otherwise noted | |||
| N4/1 | |||
| 1.1 | pin not used | ||
| 1.2 | Memory recall activation signal input | Ignition on, CC switch: not activated <1 VDC memory recall 12 VDC |
|
| 1.4 | Transmission range recognition for EA/CC/ISC system voltage input | Ignition on measure in lever position P - 1.0 VDC, R - 0.3 VDC, N - 4.0 VDC, D - 3.5 VDC, 3 - 2.5 VDC, 2 - 1.8 VDC |
|
| 1.5 | "Diagnostic port" for DTC readout and diagnostic purpose | Ignition on 12 VDC | To be tested with HHT refer to D.M. |
| 1.6 | pin not used | ||
| 1.7 | Fuel cut off signal output | Ignition on 2.2 - 11 VDC | Feed from M16/1 |
| 1.8 | pin not used | ||
| 1.9 | CTP switch signal input activated with acceleration pedal in rest position | Ignition on, acceleration pedal position: CTP < 1 VDC WOT 1.0 - 2.25 VDC |
see also pin 1.25 |
| 1.10 | Decelerate activation signal input | Ignition on, CC switch: not activated <1 VDC decelerate/set 12 VDC |
|
| 1.11 | Acceleration activation signal input | Ignition on, CC switch: not activated <1 VDC accelerate/set 12 VDC |
|
| 1.12 | Rear axle VSS input, processed in traction system ECM | Ignition on, lift rear of vehicle. Turn any rear wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving |
20 mph / 200 Hz 35 mph / 330 Hz square wave |
| 1.13 | Stop lamp switch (normally closed) input | 12 VDC with brakes not applied, 0 VDC with brakes applied. | |
| 1.14 | pin not used | ||
| 1.15 | LF VSS input, processed in traction system ECM | Ignition on, lift front of vehicle. Turn left front wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving |
20 mph / 200 Hz 35 mph / 330 Hz square wave |
| 1.16 | Idle speed increase signal output, raises engine rpm with increasing load | Engine at idle, defrost on 12 VDC defrost off 0 VDC |
|
| 1.17-19 | pins not used | ||
| 1.20 | 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 |
| 1.21 | CAN-Bus (low side). high speed data transfer bus input and output, shares data with other ECMs | ||
| 1.22-23 | pins not used | ||
| 1.24 | Engine idle mode recognition signal output | Ignition on, acceleration pedal position: CTP < 4.8 VDC WOT > 5.5 VDC |
|
| 1.25 | CTP switch signal output | Ignition off ECM disconnected acceleration pedal not depressed > 20 Ohms depressed approx. 1000Ohms |
see also pin 1.9 |
| 1.26-28 | pins not used | ||
| 1.29 | Backup lamp signal input | Ignition on lever in position R - 12 VDC | switched by S16/1 pin2 |
| 1.30 | Stop lamp switch (normally open) input. Same signal as to brake lights |
12 VDC with brakes applied, 0 VDC with brakes not applied | |
| 1.31 | Control contact signal input CC switch operational recognition |
Ignition on, CC switch: not activated <1 VDC all other positions 12 VDC |
|
| 1.32 | Pin not used | ||
| 1.33 | CC switch OFF mode recognition signal input | Ignition on, CC switch: not activated 12 VDC OFF <1 VDC |
|
| 1.34 | Engine rpm increase signal input to raise rpm due to load increase when additional consumer is activated | Engine at idle all additonal consumers off < 1 VDC alternately switch on systems - HS front/rear 12 VDC - fan stage 3 12 VDC - rear window defroster 12 VDC - lights 12 VDC |
|
| 1.35, 36 | Circuit 87, switched power output, supplies EA/CC/ISC system | Ignition on 12 VDC | |
| 1.37, 38 | Main ground to W16/4 | Approx. 0 Ohms to ground or measure to circuit 30 12 VDC |
|
| 2.1-7 | pins not used | ||
| 2.8 | Reference potentiometer signal input | Ignition on CTP > 0.25 VDC, WOT < 4.75 VDC |
Note 1 |
| 2.9 | Actual value potentiometer signal input | Ignition on CTP > 4.85 VDC, WOT < 0.25 VDC |
Note 1 |
| 2.10 | Reference voltage output low side | Ignition on measure to pin 2.12 4.7 - 5.3 VDC | Note 1 |
| 2.11 | pin not used | ||
| 2.12 | Reference voltage output high side | see pin 2.10 | Note 1 |
| 2.13-15 | pins not used | ||
| 2.16 | Voltage supply output to safety contact and CTP switch | Ignition on, acceleration pedal position CTP voltage varies in range of 6 - 10 VDC |
|
| 2.17, 18 | pins not used | ||
| 2.19 | Magnetic clutch solenoid activation signal output (low side) | Ignition on, measure to pin 2.40 7.5 - 10 VDC | |
| 2.20 |
Actuator motor voltage supply output high side |
Ignition off, ECM disconnected, accelerator pedal in CTP position < 10 Ohms | same as pin 2.41 |
| 2.22 | see pin 2.41 | ||
| 2.23-34 | pins not used | ||
| 2.35 | Safety contact and CTP switch signal input | Ignition on, measure to pin 2.38 (+) CTP positive / WOT negative voltage value varies. Slowly depress pedal to overlap pos. (both switches are closed) < 1 VDC |
same as pin 2.38 |
| 2.36, 37 | pins not used | ||
| 2.38 | Safety contact and CTP switch signal input | see pin 2.35 | |
| 2.39 | pin not used | ||
| 2.40 | Magnetic clutch solenoid activation signal output (high side) | see pin 2.19 | |
| 2.41 2.22 |
Actuator motor voltage supply output high side low side |
Ignition off, ECM disconnected, accelerator pedal in CTP position < 10 Ohms | |
| Note 1 | Nominal value 5.0 VDC used as ref. voltage in other test steps. Deviation from this value has to be calculated to or from actual value accordingly |
||