Central locking and keyless handles
Vehicle keeps waking up while parked. Could a door handle be repeatedly telling the car someone is touching it?
What this lesson covers
CORE TEACHING Latch actuator; lock/unlock requests; microswitches; door-ajar; capacitive/proximity handles; keyless access wake-up; shared door modules. PRACTICAL DEMONSTRATIONS AND TESTS Watch lock/ajar/keyless PIDs; disconnect suspect handle/door branch; monitor sleep current; test power/ground/signal. ADVANCED / SCAN TOOL LAYER Scan keyless/door data; scope wake/signal line where service info supports it; CAN wake-up logging. KEY DIAGNOSTIC QUESTIONS What event wakes the network? Which door reports activity? Does unplugging one sensor let the car stay asleep? MUST-COVER CHECKPOINTS Start with the complaint; draw the circuit; identify expected inputs/outputs; perform physical tests; interpret evidence; prove the failed section; retest after repair.
What you will be able to do
Vehicle keeps waking up while parked. Could a door handle be repeatedly telling the car someone is touching it?
Where it sits in the programme
- Builds on
- Lesson 28: Electric mirrors
- Feeds into
- Lesson 30: Exterior lighting and strange voltages