Friday, August 2, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 661


Circuit/System Description



Voltage for the interior backlighting components is supplied from the body control module (BCM). The BCM applies a voltage reference through



the 12 V reference circuit to the headlamp and panel dimmer switch. When the dimming switch is placed in the desired position, the dimmed voltage



setting is applied from the headlamp and panel dimmer switch through the instrument panel (I/P) lamp dimmer switch signal circuit to the BCM. The



BCM then applies the dimmed voltage to the lamp supply voltage circuits and they are dimmed to the correct level.



Conditions for Running the DTC



The ignition is ON.



Conditions for Setting the DTC



B3600 03



The BCM detects a voltage that is lower than 0.10 V on the I/P lamp dimmer switch signal circuit.



B3600 07



The BCM detects a voltage that is higher than 4.97 V on the I/P lamp dimmer switch signal circuit.



Action Taken When the DTC Sets



The I/P lamps are not illuminated.



Conditions for Clearing the DTC

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