| All values measured to ground unless otherwise noted | |||
| K40/2 | |||
| C1.2,3 | Circuit 30 main power input | 12 VDC at all times | Feed from battery via X4 |
| C1.4 | Main ground to W1 | Approx. 0 Ohms to ground | |
| N10/1 | |||
| 1.5 | Hazard flasher switch signal input | S6/1s1 ON < 1 Ohm, OFF > 20 kOhms | |
| 1.8 | Hazard flasher control lamp output | S6/1s1 ON 12 VDC intermittent | |
| 2.4 | Left turn signal indicator voltage output | Ignition on, 12 VDC intermittent with left turn signal on | A1e1 flashing Note 2 |
| 2.5 | Right turn signal indicator voltage output | Ignition on, 12 VDC intermittent with right turn signal on | A1e2 flashing Note 2 |
| 2.6 | CAN Class B bus (high side). Mid speed data transfer bus input and output, exchanges data with EIS ECM | No reliable test. Check continuity to all appropriate ECMs. Approx. 5 VAC when data is on bus | Note 3 |
| 2.7 | CAN Class B bus (low side) | See pin 2.6 | |
| 4.1 | CAN Class B bus (low side). Mid speed data transfer bus input and output, exchanges data with other ECMs | No reliable test. Check continuity to all appropriate ECMs. Approx. 5 VAC when data is on bus | |
| 4.2 | CAN Class B bus (high side) | See pin 4.1 | |
| 4.7 | Right rear turn signal lamp voltage output | Ignition on, 12 VDC intermittent with right turn signal on | E4e1 flashing Note 2 |
| 4.8 | Left rear turn signal lamp voltage output | Ignition on, 12 VDC intermittent with left turn signal on | E3e1 flashing Note 2 |
| 5.1 | Right front turn signal/side marker lamp voltage output | Ignition on, 12 VDC intermittent with right turn signal on | E6/2 flashing Note 2 |
| 5.3 | Left front turn signal/side marker lamp voltage output | Ignition on, 12 VDC intermittent with left turn signal on | E6/1 flashing Note 2 |
| N73 | |||
| A.2,3 | Circuit 30 main power input | 12 VDC at all times | Feed from battery via X4 |
| B.3 | Main ground to W1 | Approx. 0 Ohms to ground | |
| 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.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 2 |
| B.11 | CAN Class B bus (low side) | See pin B.10 | |
| 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 3 |
| C.2 | CAN Class C bus (lowside). High speed data transfer bus input and output | See pin C.1 | |
| Note 1 | Due to various functions K40/2, N10/1 and N73 are split up in several system diagrams, therefore only the relating pins are listed. Pins not shown are unrelated to this system | ||
| Note 2 | Turn signal/hazard warning flasher frequencies: 1.5 Hz (90/min) with all turn lights ok. 3.0 Hz (180/min) one or more turn lights defective |
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| Note 3 | N73 is gateway for data exchange between CAN Class B and Class C bus | ||