| All values measured to ground unless otherwise noted | |||
| N73 | |||
| A.1 | Circuit 15 power output | Ignition on 12 VDC | Distribution via Z3/26 |
| A.2,3 | Circuit 30 main power input | 12 VDC at all times | Feed from battery via X4 |
| A.4 | Circuit 15R power output | 12 VDC with key in steering lock position "1" | Distribution via Z3/27 |
| A.5 | pin not used | ||
| A.6 | Circuit 30 power output to electronic steering lock ECM | 12 VDC at all times | Distribution via F1f27 |
| B.1 | Combination switch signal input | Ignition on, wiper switch S4s5 in position: Intevall 31.5-31.7 Ohms stage 1 31.0-31.1 Ohms stage 2 30.8-30.9 Ohms |
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| B.2 | Combination switch signal input | Ignition on, washer switch S4s4 in position: Touch wipe 31.0-31.1 Ohms wash 30.8-30.9 Ohms |
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| B.3 | Main ground to W1 | Approx. 0 Ohms to ground | |
| B.4 | ??? | ||
| B.5 | ??? | ||
| B.6 | Combination switch signal input | Ignition on, turn signal switch S4s4 in position: Off 0 VDC left < 8 VDC right 12 VDC |
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| B.7 | Circuit 30 main power input | 12 VDC at all times | Feed from battery |
| B.8 | Horn contact switched ground signal input | Ignition off, approx. 0 Ohms or Ignition on, measure to circuit 30, depress horn contact 12 VDC |
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| B.9 | Circuit 50 signal output | < 1 VDC to pin B.7 (circuit 30) with key held in starting position | |
| B.10 | CAN Class B bus (high side). Mid speed data transfer bus input and output, exchanges data with SAM ECM | No reliable test. Check continuity to all appropriate ECMs. Approx. 5 VAC when data is on bus | HHT is also used for CAN diagnosis Note 1 |
| B.11 | CAN Class B bus (low side) | See pin B.10 | |
| B.12 | Circuit 15X power output to A/C ECM | Ignition on 12 VDC | |
| B.13 | Circuit 15c "Ignition Key" recognition | 12 VDC with ignition key inserted in steering lock | Buzzing signal when door is opened with key still inserted |
| B.14 | "Diagnostic port" for DTC readout and diagnostic purpose | No reliable test | To be tested with HHT |
| C.1 | CAN Class C bus (high 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 | HHT is also used for CAN diagnosis Note 2 |
| C.2 | CAN Class C bus (lowside). High speed data transfer bus input and output | See pin C.1 | |
| D.1 | Memory recall activation signal input | Ignition on, CC switch: not activated < 1 VDC memory recall 12 VDC |
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| D.2 | Control contact signal input. CC switch operational recognition | Ignition on, CC switch: not activated < 1 VDC all other positions 12 VDC |
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| D.3 | Decelerate activation signal input | Ignition on, CC switch: not activated < 1 VDC decelerate/set 12 VDC |
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| D.4 | Acceleration activation signal input | Ignition on, CC switch: not activated < 1 VDC accelerate/set 12 VDC |
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| D.5 | CC switch OFF mode recognition signal input | Ignition on, CC switch: not activated 12 VDC OFF < 1 VDC |
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| D.6 | Circuit 15 power supply to CC switch | Ignition on 12 VDC | |
| Note 1 | N73 is gateway for data exchange between CAN Class C and Class B bus | ||