Pin Voltage Tests
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
Cruise control ECU pin voltage testing is used for diagnosing intermittent symptoms and faults that are unable to be resolved during self-diagnostics. Pin voltage tests ensure cruise control ECU is receiving and transmitting proper voltage signals. To perform pin voltage tests, remove cruise control ECU with connector attached. See Figure. Test cruise control ECU voltages by backprobing ECU connector using a DVOM with ignition switch in ON position, unless otherwise specified. See Fig 1. If voltage readings are as specified, cruise control ECU may be faulty.