Checking the wiring and component
- Ignition off.
Check at the battery that the battery voltage is not too low.
Check the system relay and system relay base. Check for contact resistance and oxidation according to Contact resistance and oxidation .
Check fuse 12 the integrated relay / fusebox in the engine compartment. If the fuse is blown, check the circuit for the fuse for a short-circuit to ground according to Short-circuit to ground, permanent faults .
Check the cable between system relay base terminal #3 and fuse 12 in the integrated relay / fusebox in the engine compartment. Check for an open-circuit according to Open-circuit, permanent faults .
HINT: The voltage between ground and system relay base terminal #3 must be approximately 12 volt.
Check the cable from system relay base terminal #5. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults . Check for an open-circuit according to Open-circuit, permanent faults .
Try a new system relay if no fault is found during the above fault-tracing.
Remedy as necessary.
Other information
- To connect the breakout box and access the control module, see Connecting the breakout box. EMS 2000
- To access or replace the system relay, see Engine compartment
- For information about signals see Signal specification .
- Continue
Refer to Verification