PINPOINT TEST I : The Start-Stop Switch Mode Indicator is Always or Never Illuminated: Notes

Diagnostic Overview

The Start-Stop Switch Mode Indicator is Always or Never Illuminated

Refer to Power Distribution/BCM for schematic and connector information.

Normal Operation and Fault Conditions

The BCM uses a FET as circuit protection for the start/stop switch indicator and as an electronic switch to turn the start/stop switch indicator on and off. The FET receives fused battery voltage from BCM fuse 18 (10A). When the start/stop switch is pressed a voltage and ground signal are sent to the BCM. When the vehicle enters RUN or START mode, the BCM forward biases the FET which provides voltage to the amber LED in the start/stop switch, illuminating the word ENGINE.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
B1240:11	Start Button Mode Indicator: Circuit Short to Ground	The BCM continuously monitors the start/stop switch indicator circuit, this DTC is set if the module detects a short to ground on the indicator circuit. When this DTC sets, the mode indicator circuit is disabled via the FET. Once the condition that caused the DTC to set is repaired, the BCM must pass a self-test in order for the DTC to clear and the system to resume normal operation.
B1240:15	Start Button Mode Indicator: Circuit Short to Battery or Open	The BCM continuously monitors the start/stop switch indicator circuit, this DTC is set if the module detects a short to battery or an open on the indicator circuit. When this DTC sets, the mode indicator circuit is disabled via the FET. Once the condition that caused the DTC to set is repaired, the BCM must pass a self-test in order for the DTC to clear and the system to resume normal operation.