Diagnostics and testing of entry systems

Inspection and verification

NOTE: Before beginning electrical system diagnostics, make sure the battery is fully charged.

NOTE: Before performing the CMS self-test, make sure the doors are open.

1. Check the validity of the customer's complaint by using the system.

2. Visually inspect for obvious signs of mechanical and electrical faults.

Visual inspection table

Mechanical factors	Electrical factors
– Jamming of lock/latch mechanisms – Lever mechanism jamming – Incorrect door alignment	- Car battery – Remote transmitter batteries - Remote transmitter - Unprogrammed remote transmitter – Fuse 63 (20A) Central Junction Box (CJB) - Electrical wiring – Loose or corroded connector(s) – Electrical circuit(s) – Door lock switch – Electric door lock drive

3. If an obvious cause for the problem you have identified or the customer has described is found, correct the problem (if possible) before proceeding further.

4. If the problem is not visually obvious, check the symptom and contact WDS to diagnose the system.