Circuit Description
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
The actuator motor is operated by signals from the ECU. See Fig 1. Acceleration and deceleration signals are transmitted according to changes in the duty ratio. See Fig 2. The duty ratio is the ratio of the period of continuity in 1 cycle. For example, if "A" is the period of continuity in 1 cycle, and "B" is the period of non-continuity.
Detection Item
- DTC 11: Short in actuator motor circuit.
- DTC 15: Open in actuator motor circuit.
Trouble Area
- DTC 11 & 15: Actuator motor.
- DTC 11: Wiring harness or connector between cruise control ECU and actuator motor.
- DTC 11: Cruise control ECU.