| All values measured to ground unless otherwise noted | |||
| A37 | |||
| 1.8 | CAN Class B bus (high side). Mid speed data transfer bus input and output, exchanges data with other ECMs | No reliable test. Check continuity of wiring. Approx. 5 VAC when data is on bus | HHT is also used for CAN diagnosis |
| 1.9 | CAN Class B bus (low side) | See pin 1.8 | |
| 2.3 | Main ground to W7 | Approx. 0 Ohms to ground | |
| 2.4 | Circuit 30 fused power input | 12 VDC at all times | Feed from F4f2 |
| 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 | |||
| 1.6 | RHR switch signal input | RHR switch S6/1s3 in: Rest position > 20 kOhms depressed pos. approx. 760 Ohms |
|
| 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 | |
| Note 1 | Due to various functions A37, K40/2 and N10/1 are split up in several system diagrams, therefore only the relating pins are listed. Pins not shown are unrelated to this system | ||