Glow Plug System - INGENIUM I4 2.0L Diesel (G1809317): Operation: Diagnostic

WARNING: This page is about a different car, the 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

The glow plug control unit monitors the drive circuit of the glow plugs for plausibility of operation, continuity, and short and open circuits. If the glow plug control unit detects a fault is detected, it sends a signal to the ECM, which then stores a related DTC.

The ECM contains functionality to protect the glow plugs from exceeding their operating temperature. The protection can lead to a limitation of the power supplied to the glow plugs if a second pre-heat period is required. This may happen when there is a failed start or if the ignition has been left on without starting the engine for more than six seconds. To ensure maximum power is supplied to the glow plugs, we recommend an ignition off period of 10 seconds between repeated glow pre-heat phases.