12.1. Interpreting Apollo ECU LEDs
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CM-40 Power LED
LED state Power state
Green ECU power on
solenoid power on
VCB solenoid power on
Amber ECU power on
Either solenoid or VCBsolenoid power on
Flashing amber ECU power on
solenoid power off
VCB solenoid power off
Red ECU, solenoid, VCB solenoid or sensor power fault
solenoid and VCB solenoid power off
affected sensor supplies off
an alarm is triggered
Off ECU, solenoid, VCB solenoid and sensor power off
Sensor power is on when the ECU is on, unless the sensor power
supplies experience a fault.
EM-24 Power LED
LED state Power state
Green ECU power on
solenoid power on
VCB solenoid power on
sensor power (5V, 8V and 12V) on
Amber ECU power on
solenoid power on
VCBsolenoid power on
some or all sensor power off
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