Test S

PINPOINT TEST S: THE SERVICE ENGINE SOON INDICATOR IS NEVER ON

Test S1-S2:

Normal Operation
The malfunction indicator lamp (MIL) is controlled by the instrument cluster utilizing data sent from the powertrain control module (PCM) over the standard corporate protocol (SCP) communication network, circuits 914 (TN/OG) and 915 (PK/LB).

Possible Causes
- PCM
- instrument cluster