Eight steps from an empty cabin to a working SC-1. Written for authorised Santim service partners, with every warning and every check in one place.
08
Steps
06
Warnings
04
Troubleshooting paths
A clean installation starts with the right tools on the bench.
SC-1 needs constant power, switched power, ground and the two wires of the CAN pair. Nothing more.
Schematic drawing. Colours identify functions, not wire colours.
Six rules that protect the vehicle, the installation and your time.
Cutting or lengthening the twisted pair changes the network and can disturb other control units. Tap it in place, through a short window of insulation.
A mains iron without proper grounding can damage control units. Use an EMC-safe or battery-powered iron, or approved connectors.
New vehicles can leave the factory in transport mode, which limits or switches off some systems. Have the dealer deactivate it before installation.
On some vehicles, a feed that looks constant switches off 1–2 Stunden after the vehicle is locked. Choose a true constant feed, or SC-1 loses power while parked.
SC-1 and the system it connects to must share the same ground. Separate grounds can cause communication errors.
On electric and hybrid vehicles, the vehicle must be in READY mode during power-up and the road test. With the ignition merely on, some networks stay asleep.
Work through them in order. Each step ends with the checks to tick before you move on.
Choose a dry place inside the cabin, away from heat sources, moving parts and airbag deployment zones. Keep the LEDs where a technician can see them, and leave room to route cables without tension.
Use the vehicle’s wiring diagram and confirm each feed with a multimeter. Constant +30 stays live with the ignition off. Switched +15 is live only with the ignition on. Ground must be a solid chassis or harness ground.
Fit an inline fuse of no more than 2 A on the constant +30 feed, as close to the tap point as practical. Never take power from a feed without a fuse.
Find the twisted CAN-H and CAN-L pair at a sensible, accessible point, such as near a control unit connector and away from airbag and safety-system wiring. Confirm the pair with a multimeter before you touch it: on high-speed CAN with the network awake, CAN-H reads about 2,5–3,5 V and CAN-L about 1,5–2,5 V to ground.
Open a short window of insulation without cutting the conductor, then solder with an EMC-safe iron or use approved connectors. Insulate every joint, keep the branch to SC-1 short and secure the cables against strain. Never cut or extend the vehicle’s CAN wires.
Reconnect power and switch the ignition on. POWER lights up when supply is present, and CAN shows activity once the vehicle network is awake. ERROR stays off.
Open SConnect, pair with SC-1 over Bluetooth and check the device status in the app. From here, SConnect guides you through the rest of the setup.
Finish with a short drive on the road with all four wheels on the ground: no lift, no roller test bench. Follow the prompts in SConnect until the setup is complete.
The labels printed on the housing tell you what each LED reports.
| LED | Colour | Meaning | Not as expected? |
|---|---|---|---|
| POWERGreen | Green | Supply present | POWER stays off |
| CANYellow | Yellow | CAN activity | No CAN activity |
| ERRORRed | Red | Fault indication | ERROR is lit |
With the ignition on and the installation complete, POWER and CAN are lit and ERROR is off.
On high-speed CAN, with a digital multimeter:
Network awake
≈ 2,5–3,5 V
Network awake
≈ 1,5–2,5 V
Ignition off, network asleep
≈ 60 Ω
Choose what you see on SC-1, then work through the checks in order. Tick each one as you go.
What do you see?
Checks · No POWER
Check the fuse
Inspect the fuse on the constant +30 feed and test it for continuity. Replace it with a fuse of no more than 2 A.
Measure the supply at SC-1
Expected7,5–32 V DCWith the ignition off, measure between +30 and ground at the SC-1 connection.
Check switched +15
With the ignition on, +15 must be live at the SC-1 connection.
Check the ground
Measure continuity between the SC-1 ground and the chassis. Loose or painted ground points are a frequent cause.
Transport mode
On new vehicles, make sure transport mode has been deactivated.
A feed that switches off
If POWER goes out after the vehicle has been parked for a while, the feed is not truly constant. Move to a constant +30 feed.
[ Installation ]
Our team supports authorised service partners with installation and technical questions.