Input Signal Circuits: Notes
WARNING: This page is about a different car, the 1997 Lexus SC 400. However, it is still accessible from the selected car via links, so may be relevant.
Use this procedure to determine whether cruise control ECU is receiving input signals from various switches and speed sensor. To perform procedure, enter diagnostic mode, then check if CRUISE indicator light responds as it should. See Figure.
NOTE:
If diagnostic mode cannot be entered, perform procedure for Code 32. See DTC TEST 32: CRUISE CONTROL SWITCH CIRCUIT under DTC TESTS.