| All values measured to ground unless otherwise noted | |||
| N54 | |||
| 1 | Main ground to W19 | Approx. 0 Ohms to ground | |
| 2 | Sensor ground signal output | Approx. 0 Ohms to ground | |
| 2 | Unlock command SN1 signal ouput, generated from RCL system, to activate PSE module | Use remote control Lock vehicle 12 VDC Unlock vehicle < 1 VDC |
Initialized with IR transmitter or manually with key |
| 4 | Lock command SN2 signal output, generated from RCL system, to activate PSE module | Use remote control Unlock vehicle 12 VDC Lock vehicle < 1 VDC |
Initialized with IR transmitter or manually with key |
| 5 | Vehicle locking confirmation signal output | Lock vehicle whether manually or with IR transmitter, red indicator flashes. Use scope 12 Vpp when confirmation occurs | |
| 6 | Vehicle unlocking confirmation signal output | Unlock vehicle whether manually or with IR transmitter, green indicator flashes. Use scope 12 Vpp when confirmation occurs | |
| 7 | Interior rear view mirror infrared sensor signal input | Using IR transmitter, lock vehicle, keep button depressed until locking process is finished, monitor voltage. Release button, voltage will raise approx. 0.3 - 1.0 VDC | |
| 8 | Unlock command driver side / trunk signal input | Disconnect A37 plugs, in rest position > 20 kOhms in unlock mode <40 Ohms |
Initialized from S86/1 and S88/2 |
| 9 | Circuit 15 main power input | Ignition on 12 VDC | Feed from F1f23 via Z3/15 |
| 10 | Lock command driver side / trunk signal input | Disconnect A37 plugs, in rest position > 20 kOhms in unlock mode <60 Ohms |
Initialized from S86/1 and S88/2 |
| 11 | RCL receiver voltage supply output | 5 VDC at all times | |
| 12 | Circuit 30 main power input | 12 VDC at all times | Feed from F4f15 |
| 13-18 | Pins not used | ||
| 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. |
Also other ECMs can cause CAN-Bus DTCs. |
| L | CAN-Bus (low side). High speed data transfer bus input and output, shares data with other ECMs. | Disconnect plug 2 from N54. Approx. 120 Ohms across pins H and L | HHT is also used for CAN diagnosis |
| Note | System also supports DAS function DAS causes fuel injection interruption if not a legal unlock procedure is recognized. Since RCL and engine ECM's both have an interactive ID code, swapping modules from other vehicles is not possible. |
HHT is also used for diagnosis. Refer to DM Body and Accessories Vol 1 sect. 4 |
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