| All values measured to ground unless otherwise noted | |||
| N15/3 | |||
| 1.12 | RPM sensor Y3/6n2 signal input, used additionally with wheel and engine rpms | No or distorted signal from n2 will set DTC 012/108 on HHT |
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| 1.13 | Power output to RPM sensors Y3/6n2, n3 | Approx. 4-8 VDC with ignition on | |
| 1.14 | Switched ground output, activates Y3/6y3 valve | Ignition off, ECM disconnected: Approx. 2.5-6.5 Ohms to pin 1.38 |
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| 1.15 | Switched ground output activates Y3/6y4 valve | Ignition off, ECM disconnected: Approx. 2.5-6.5 Ohms to pin 1.38 |
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| 1.16 | Switched ground output activates Y3/6y5 valve | Ignition off, ECM disconnected: Approx. 2.5-6.5 Ohms to pin 1.38 |
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| 1.17 | Switched ground output activates Y3/6y6 valve | Ignition off, ECM disconnected: Approx. 2.5-4 Ohms to pin 1.38 |
PWM signal to regulate pressure |
| 1.33 | Sensor common ground signal output | < 5 Ohm to ground | |
| 1.34 | Starter lock-out signal and transmission fluid temperature signal input | > 20 kOhms in lever position P and N approx. 0.5-2.5 kOhms in all other position measured to pin 1.33 |
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| 1.35 | RPM sensor Y3/6n3 signal input used additionally with wheel and engine rpms | No or distorted signal from n3 will set DTC 013/109 on HHT |
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| 1.36 | Switched ground output, activates Y3/6y1 valve | Ignition off, ECM disconnected: Approx. 4-8 Ohms to pin 1.38 |
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| 1.37 | Switched ground output, activates Y3/6y2 valve | Ignition off, ECM disconnected: Approx. 4-8 Ohms to pin 1.38 |
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| 1.38 | Power output supplies valves in valve unit | Ignition on 12 VDC | |
| 1.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. |
Note 2 Also other ECMs can cause CAN-Bus DTCs. |
| 1.L | CAN-Bus (low side). High speed data transfer bus input and output, shares data with other ECMs. | HHT is also used for CAN diagnosis | |
| 2.1 | DTC diagnostic output also input for HHT data and test |
Ignition on 12 VDC, approx. 8 VAC when data transmission active |
Note 1 |
| 2.2 | Kick-down recognition | 0 VDC with kick-down switch activated | Feed from ground via S16/6 |
| 2.3 | Program recognition for Standard or Winter mode | Ignition on approx. 12 VDC with program swith in "W" approx. 0 VDC with program swith in "S" |
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| 2.4 | Prevents from unintentional gear shifting into "R" or "P" above a speed of approx. 6 mph |
No reliable test Approx. 20-35 Ohms across Y66/1 solenoid approx. 12 VDC when VSS < 6 mph approx. 0 VDC when VSS > 6 mph |
Test in "D" |
| 2.5,6 | Pins not used | ||
| 2.7 | Starter lock-out signal switched ground output, permits starting in lever position "P" or "N" only |
measure to circuit 30 approx. 12VDC in lever position "P" or "N", approx. 0 VDC in any other position |
Initialised from Y3/6s1 and S 16/10 |
| 2.8-24 | Pins not used | ||
| 2.25 2.26 2.27 2.28 |
Transmission range recognition input. Actuates valve unit (ETC) depending on position of selector lever. | For test values see chart in diagram | HHT is also used for S16/10 diagnosis |
| 2.29 | Circuit 87 power input to ECM, switched by relay K40/4k1 | Ignition on 12 VDC | Feed from battery |
| 2.30 | Main ground to W29/2 | Approx. 0 Ohms to ground | |
| Note 1 | DTC memory of sporadic faults is reset with ignition off | ||
| Note 2 | CAN-Bus interchanging data: Received - Engine rpm - Engine load - VSS speed signal rear axle - Accelerator pedal position - Engine coolant temperature Transmitted - Engaged gear - Overload protection requirements - Kick-down - Limp-home mode |
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