Test Point 16 - Leads K and L

TEST POINT 16: - leads K and L
The diagnostic connection between the EZK control unit and the diagnosis tester is by way of the two leads K and L. If diagnosis is not possible, perform the following checks:

1. Continuity test (refer to wiring diagram)
Lead L: Pin 7 (19-pole diagnosis socket) - Pin 7 (EZK plug)
Lead K: Pin 8 (19-pole diagnosis socket) - Pin 1 (EZK plug)

2. Ground short test (refer to wiring diagram)
Lead L: The voltage at Pin 7 (19-pole diagnosis socket) must be > 8 V with the ignition switched on.
Lead K: The voltage at Pin 8 (19-pole diagnosis socket) must be > 8 V with the ignition switched on.

Possible causes of faults:
- Short to ground or break in wiring or plug connections.
- A faulty control unit connected to these lines (it may be any control unit with diagnosis capability, not necessarily the EZK control unit).
- Checking: disconnect plugs successively at the control units with diagnosis capability until the voltage becomes > 8 V. Renew the control unit which is causing the fault.
- Faulty tester.
- No power supply at diagnostic plug.
- No ground at diagnostic plug.