CEM-8F28

Condition

Relay should not have to be activated to display the diagnostic trouble code. If the central electronic module (CEM) detects an open circuit on the wiper high speed relay, diagnostic trouble code CEM-8F28 is displayed.

Substitute value

- None.

Possible source

- Open circuit in signal wire.
- Open circuit in power supply to the relay.
- Faulty relay.
- Relay is not installed.

Fault symptom[s]

- Wiper only works on lowest speed.