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Home >> Jaguar >> 2015 >> XFR-S >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Electronic Engine Controls - GTDI 2.0L Petrol -- XF/X250) >> Electronic Engine Controls - GTDI 2.0L Petrol >> Description And Operation >> Electronic Engine Controls - System Operation And Component Description (G1550549) >> Description >> Stop Lamp Switch

Stop Lamp Switch

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

The stop lamp switch receives a permanent 12V fused supply from the CJB and when the brake pedal is depressed passes a signal voltage to both the CJB and the ECM. The ECM can diagnose the operation of the stop lamp switch and the status of the switch can be read using a Jaguar approved diagnostic system.

The ABS module, the ECM and the CJB use the signals from both stop lamp switches and also the brake pressure sensor to perform plausibility checks. If one of the stop lamp switches fails, the diagnostic checks will be aware of the fault and the brake warning indicator in the IC will be illuminated.

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