It can take several minutes to reach 600☏, and may drop below operating temperature while idling. The unheated sensor relies on exhaust gases for heat. The oxygen sensor needs to be at least 600☏ in order to produce a signal. There are two (2) types of oxygen sensors, heated and unheated. Reconnect the negative (-) battery cable & test instrument to ensure that it is working. Connect other light wire (BLACK) to chassis ground. NOTE: If you are hooking the signal wire at the oxygen sensor, connect to the vehicle wire harness, not the wires from the sensor.Ĭonnect one (1) of the light wires (WHITE) to the dash lighting circuit or to a +12V switched circuit.
#HOW TO INSTALL AEM AIR FUEL RATIO GAUGE 2011 STI MANUAL#
wire, connect the (S) sender terminal to the signal wire from the oxygen sensor (refer to your vehicle service manual or your dealer for hookup location information). wire, connect the (+) terminal to a switched +12V source. wire, connect the (-) terminal to a clean (rust/paint-free) engine ground. TIP: It may be easier to pre-wire gauge before installing!ĭisconnect negative (-) battery cable. Maximum torque for mounting screws is 6 in. Secure the gauge in the hole using the supplied retaining bracket, lock washers and #8-32 nuts. Recommended panel cut-out (hole size) for 2-5/8″ nominal gauge is 2.670″ +/. Recommended panel cut-out (hole size) for 2″ nominal gauge is 2.098″ +/. NOTE: Instructions apply to 2″ & 2-5/8″ gauges (nominal SAE diameters).
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