Pinpoint Test D: Latch Mounted Door Ajar Switch Test

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.

Test 4 Door Latch
NOTE:
If a customer is complaining of issues relating to a door ajar signal e.g. door latch won't lock, or alarm system triggering (indicated via DTC's), there may be several components that generate the fault, including
- Door Latch ajar switch
- Alarm control module
- Central junction box
- Body wiring harness / connectors
- Door wiring harness / connectors
NOTE: To investigate the functioning of the door ajar switch contained within the door latch, to prove or eliminate the door latch mounted door ajar switch as the root cause, follow the process below. This will prevent the unnecessary replacement of a correctly functioning door latch

Remove door trim from door Refer to Refer to Front Door Trim Panel information. Refer to Rear Door Trim Panel information.

Remove module plate / closing panel from door

Remove latch module from door. Refer to Front Door Latch and Rear Door Latch .

Inspect latch module for any visual damage

NOTE: Figure 1 - Unlatched position shown

NOTE: Figure 2 - First safety latched position shown

NOTE: Figure 3 - Fully latched position shown

NOTE: Test will not work if latch is only in first safety latch position

Using a small screw driver or similar, rotate latch claw to the second fully latched position (figure 3)

Carry out continuity test between terminals 1 and 4 (left side) or 8 and 4 (right side) with claw closed

Does the continuity test pass?

YES: The latch ajar switch is working correctly. Do not replace latch . Investigate for fault elsewhere in vehicle system

NO: Release latch claw and repeat test from step 5 to confirm result. If this is a repeat test and you are sure that the ajar switch does not provide continuity when fully latched. Replace the latch. If replacing latch as part of a warranty claim, please quote reference code AJARINOP in the technician comments section of the warranty claim