AEM Analog Oil Transmission Water Temperature SAE Gauge 305140 User Manual

							 
 
 
 
AEM Performance Electronics 2205 126th Street Unit A, Hawthorne, CA. 90250 Phone: (310) 484-2322 Fax: (310) 484-0152 http://www.aemelectronics.com Instruction Part Number: 10-5140 Rev 01  2010 AEM Performance Electronics 
 
Part Number 30-5140  
Analog Style 100°F - 300°F Oil/Coolant/Trans Temperature Gauge 
NOTE: Faceplate Configuration Instructions Included on Separate Sheet 
 
Figure 1.  Wiring Schematic 
AEM Oil/Coolant/Trans Temperature Gauge Parts 
1 x 35-5140 Temperature Gauge Assembly  
1 x 35-2012 Temperature Sensor 
1 x 35-4302 Install Kit (6 Butt Connectors) 
1 x 10-5140 Installation Instructions 
1 x 35-3411 8-Pin Power Harness 
1 x 35-3413 3-Pin Sensor Harness 
1 x 35-8529S Silver Bezel 
1 x 35-8539W Trans Temp Faceplate, White 
1 x 35-8539B Trans Temp Faceplate, Black 
1 x 35-8541W Oil Temp Faceplate, White 
1 x 35-8542W Coolant Temp Faceplate, W hite 
1 x 35-8542B Coolant Temp Faceplate, Black 
1 x Faceplate Configuration Instructions 
1 x Paper Clip Needle Removal Tool 
 
  
						

							Page 2 
INSTALLATION 
 
1. Disconnect the negative battery cable. 
2. Secure the gauge in a 2 1/16th” (52MM) mounting hole with the supplied bracket. 
3. Plug the 8-wire power harness into the mating connector on the back of the 
gauge and connect the wires as shown in Figure 1.  Note: the locating tabs on 
the side of the connector should be nearest the center of the gauge. 
4. Thread the sensor into a suitable temperature port that has 1/8” NPT female 
threads.  Note: a small amount of thread sealant may be used. 
5.  Connect the sensor to the gauge using the 2-wire sensor cable.  The single-row, 
3-position connector connects to the back of the gauge.  The locating tabs on the  
connector should be nearest the center of the gauge. 
6. Reconnect the negative battery cable. 
 
RED (Power) - Connect to a constant 12 volt power source utilizing a 5A fuse. 
 
BLACK (Ground) – Connect to a clean power ground. 
 
PINK (Switched Power) – Connect to a switched 12 volt power source utilizing a 5A 
fuse.   
 
GREY (Light Intensity) - Connect to instrument lighting circuit supply voltage. 
  
*WHITE (Analog Output) - Connect to Analog + Input. 
 
*BROWN (Analog Ground) - Connect to Analog – input. (Must be connected if Analog + 
is used) 
 
*optional – only needed if using the available differential analog output  
 
Wiring notes: 
 RED - When wired as shown above, the gauge will park the needle against the 
needle stop upon powering down.  Alternatively, the RED wire can be connected to the 
same location as the PINK wire.  With the RED wire and the PINK wire connected to the 
same switched power, the needle will remain at its current position upon powering 
down.  For both power connection methods, the needle will rotate to the parked position 
before rotating to the value of the current operating condition upon powering up. 
 GREY – The GREY wire is used to control the lighting intensity of the gauge.  
Maximum lighting intensity is achieved when the GREY wire is connected to 12 volts.  
Minimum lighting intensity is achieved when the GREY wire is not connected.  The 
instrumentation illumination on many vehicles is controlled by varying the supply voltage 
to the instrument panel lights.  When the GREY wire is connected to the instrument 
panel supply voltage, the intensity of the gauge is controlled by the dimmer switch on 
the dash. 
 WHITE – The WHITE wire should be connected to the Analog + input on the 
AEM EMS or the analog + input on a similar device. 
 BROWN – The BROWN wire should be connected to the Analog – input.  If the 
EMS or similar device does not have a – input, the BROWN wire should be connected 
to a sensor ground.  If no sensor ground is available, the BROWN wire should be 
connected to a power ground.  Note: The BROWN wire must be connected in order 
to get correct readings from the analog output.  
						

							Page 3 
Changing the Bezel and Faceplate 
 
The gauge kit comes with the black bezel and black faceplate installed.  However, the 
kit also comes with a silver bezel and multiple faceplates.  Instructions on how to 
change the faceplate are included in the kit on a separate sheet of paper.  To change 
the 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, and rubber 
spacer are all removable.  Reassemble the gauge as shown below in Figure 3.  Note: 
When reassembling the gauge, it may be necessary to apply a light amount of pressure 
on the lens and spacer to keep the faceplate from rotating when reinstalling the bezel.   
Do not over tighten the bezel when reassembling the gauge.  
 
 
 
 
 
 
 
 
Backlighting 
 
The AEM Boost Gauge has 7 different backlight colors available to the end user, which 
closely match some of the more common factory dash panels: white, blue, green, red, 
orange, light blue, and aqua.   To change the backlight color, rotate the backlighting 
switch using a small precision style screwdriver.  The backlight switch is accessed 
through the small hole in the back of the gauge. 
 
Figure 3.  Changing Bezels 
BEZEL 
LENS 
RUBBER 
SPACER  
						

							Page 4 
 
 
 
Status Lights 
 
The AEM Temperature gauge has two status lights, see Figure 4.  The status light on 
the left will turn on solid if the temperature is less than 100°F (40°C).  The status light on 
the right will flash if the temperature exceeds 300°F (148°C).   Both status lights will 
flash if the sensor is disconnected.  The needle will point straight downward if the 
temperature exceeds 300°F (148°C) or the sensor is disconnected.  See Table 1 for a 
description of the conditions. 
 
 
 
 
 
 
Status Light Condition Corrective Action 
Left on Solid Temperature below 100°F (40°C) -- 
Right Flashing Temperature above 300°F (148°C) -- 
Both Flashing Sensor Disconnected/Wires 
Shorted 
Check wiring 
 
 
Figure 4.  Backlighting Adjustment 
Table 1.  Status Light Conditions 
Figure 4.  Illuminated Status Lights 
 ACCESS  
 PORT 
Left 
Status 
Light 
Right 
Status 
Light  
						

							Page 5 
Analog Output 
 
The analog output from the AEM Temperature gauge is a linear dc voltage signal that 
varies from 0.5 Vdc at 100°F (40°C) to 4.5 Vdc at 300°F (148°C) over the operating 
range of the gauge.  The signal is used for sending information to a data logger or an 
engine management system like the AEM EMS or F/IC.  The transfer function for 
temperature in degrees Fahrenheit is listed below. 
 
Temperature (Fahrenheit) = 50 x Voltage + 75  
 
The transfer function for temperature in degrees Celsius is listed below.   
 
Temperature (Celsius) = 27 x Voltage + 26.5 
 
A list of output voltages and corresponding temperatures is shown below in Table 1. 
 
Voltage Temperature 
0.50 100 degF 40 degC 
0.75 113 degF 47 degC 
1.00 125 degF 54 degC 
1.25 138 degF 60 degC 
1.50 150 degF 67 degC 
1.75 163 degF 74 degC 
2.00 175 degF 81 degC 
2.25 188 degF 87 degC 
2.50 200 degF 94 degC 
2.75 213 degF 101 degC 
3.00 225 degF 108 degC 
3.25 238 degF 114 degC 
3.50 250 degF 121 degC 
3.75 263 degF 128 degC 
4.00 275 degF 135 degC 
4.25 288 degF 141 degC 
4.50 300 degF 148 degC 
 
 
 
Connector Pinouts 
 
 The pinouts for the 3-pin sensor harness and 8-pin power harness are provided 
below in Figure 6. 
 
 
 
 
Figure 6.  Harness Pinouts 
Table 1.  Analog Calibrations  
						

							Page 6 
Specifications 
 
Gauge 
Supply Current 0.1 A  
Differential Analog Outputs 1 
Measuring Range 100°F - 300°F 
40°C - 148°C 
Operating Voltage (nominal) 8.5-15 volts dc 
Harness & Connector Temp Limit: 105C 
 
Notes 
 
The sensor is a precision pressure measuring device and should not be subject to 
mechanical or thermal shock or it may be damaged.  
 
If  further  tuning  help  is  needed  be  sure  to  visit  the  video  gallery  or  performance 
electronics  forum  at www.aemelectronics.com for  comprehensive  instructional  videos 
and information. 
 
Replacement Components 
 
35-3411 8-Pin Power Harness 
35-3413 3-Pin Sensor Harness 
35-2012 Temperature Sensor 
 
12 MONTH LIMITED WARRANTY  Advanced Engine Management Inc. warrants to the consumer that all AEM High Performance products will  be free from defects in material  and  workmanship  for  a  period  of  twelve  (12)  months  from  date  of  the  original  purchase.  Products  that  fail  within  this  12-month warranty period will be repaired or replaced at AEM’s option, when determined by AEM that the product failed due to defects in  material  or  workmanship.  This  warranty  is  limited  to  the  repair  or  replacement  of  the  AEM  part.  In  no  event  shall  this  warranty exceed  the  original  purchase  price  of the AEM  part  nor shall AEM be  responsible  for  special,  incidental  or consequential  damages or  cost  incurred  due  to  the  failure  of  this  product.  Warranty  claims  to  AEM  must  be  transportation  prepaid  and  accompanied  with dated  proof  of  purchase.  This  warranty  applies  only  to  the  original  purchaser  of  product  and  is  non-transferable.  All  implied warranties  shall  be  limited  in  duration  to  the  said  12  month  warranty  period.  Improper  use  or  installation,  accident,  abuse, unauthorized repairs or alterations voids this warranty. AEM disclaims any liability for consequential damages due to breach of any written  or  implied  warranty  on  all  products  manufactured  by  AEM.  Warranty  returns  will  only  be  accepted  by  AEM  when accompanied by a valid Return Goods Authorization (RGA) number.  Product must be received by AEM within 30 days of the date the RGA is issued.  Please note that before AEM can issue an RGA for any product, it is first necessary for the installer or end user to contact the AEM Performance Electronics tech line at 1-800-423-0046 to discuss the problem.  Most issues can be resolved over the phone.  Under no circumstances should a system be returned or a RGA requested before the above process transpires.  
Need additional help?  Contact the AEM Performance Electronics tech department at  
1-800-423-0046 or [email protected], or visit the AEM Performance Electronics 
forum at http://forum.aempower.com/forum/