AEM 30-4350 Tru-Boost Controller Gauge - Manual (Page 9)

Error Detection
ErP- If the external sensor is shorted or disconnected, the LED lights will flash
red and the center digits will display “ErP”. The error code will not activate when using
the internal pressure sensor.
ErS- If the boost solenoid is shorted or disconnected, the LED lights will flash red
and the center digits will display “ErS”. The error code will not activate when the Tru
Boost is on the off mode. Note: The solenoid always has a small pwm signal to allow
for fault detection.
Changing the gauge configuration
The AEM Tru Boost comes configured with the black bezel, black pin guide, and
the black faceplate. However, a silver bezel, a silver pin guide, and a white faceplate
are also included in the gauge kit. To change the faceplate, pin guide, or bezel, orient
the gauge so you are looking at the faceplate. Rotate the bezel counter-clockwise to
unscrew it from the gauge cup. The bezel, lens, pin guide, rubber spacer, faceplate,
diffuser, and anti-glare shield are all removable. Reassemble the gauge as shown in
Figure 10. Make sure the small light holes in the faceplate, diffuser, and anti-glare
shield line up with the light sensor on the circuit board. Do not over tighten the bezel
when reassembling the gauge.
Figure 10. Tru Boost Gauge Assembly
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