Checking components and wiring
- Ignition off.
Check that the fuses for the suspension module (SUM) are intact.
Check the relay for 15i power supply.
HINT: In the event of a fault in the 15i power supply relay, diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM). If diagnostic trouble codes (DTCs) are stored for the relay, fault trace accordingly.
Check the cable between the fuse and 15i power supply relay terminal #3. Check for an open-circuit. Check for a short-circuit to ground.
Check the cable between 15i power supply relay terminal #1 and suspension module (SUM) terminal #C1 (#31). Check for an open-circuit. Check for a short-circuit to ground.
Check the cable between suspension module (SUM) terminal #C2 (#32) and ground. Check for an open-circuit. Check for a short-circuit to supply voltage.
Other information
- To connect the breakout box, see Connecting the breakout box
- For further information about signals and other values, see Signal specification
- See Checking wiring and terminals
Was a fault detected?
- YES
Refer to Verification
- NO
Refer to Checking the bus cable