Wipers, park circuits and intelligent motors
Wipers move but stop halfway up the screen when switched off.
What this lesson covers
CORE TEACHING Traditional park switch; low/high speed; BCM control; rain sensor requests; LIN smart wiper motors. PRACTICAL DEMONSTRATIONS AND TESTS Operate speeds; test park feed/signal; inspect live switch/PID; scope LIN if intelligent motor. ADVANCED / SCAN TOOL LAYER Scope park signal or LIN traffic; scan motor position/request where supported. KEY DIAGNOSTIC QUESTIONS Does the motor know its position? Is park feed intact? Does BCM command agree with switch? MUST-COVER CHECKPOINTS Map simple vs module-controlled architecture; prove heavy power and ground; verify switch/request; command output; measure load current; inspect signal/network where used.
What you will be able to do
Wipers move but stop halfway up the screen when switched off.
Where it sits in the programme
- Builds on
- Lesson 33: Cooling fan circuits
- Feeds into
- Lesson 35: CAN Bus fundamentals — make the network visible