ISSPRO EV Temperature Gauge - Manual

EV Product Line
Trouble Shooting Steps
Temperature Gauge
Check Temperature Sensor Output
1. With power off, disconnect 2 wire connector at the temperature sensor.
2. Make sure the temperature sensor is at room temperature
3. Using a multimeter on the resistance setting check 2 wire connector resistance
going to the temperature sensor.
4. This is the output for the temperature sensor.
100°F to 240°F and 100°F to 280°F
140°F to 320°F
5. If the temperature sensor output is at 1,000Ω or less then start the engine and
check to see if the temperature sensor output increases.
6. Use the temperature sensor output chart to see if the temperature sensor output
matches the temperature of the engine.
7. 140°F to 320°F temperature sensor may need heated using another heat source
because the engine does not heat temperature sensor above 140°F at idling.
8. If multimeter measures an open or a high resistance over 2,300Ω the temperature
sensor could have a problem.
Check Gauge Resistance
1. With power off disconnect the four wire connector from wire harness that goes to
amplifier box
2. Check wires on studs to make sure wire colors match labels on studs.
Green (GN) and Yellow (Y) and Gray (GY) and White (W)
3. Using a multimeter on the resistance setting check gauge resistance.
4. Connect multimeter leads across studs label green (GN) and yellow (Y).
Resistance should measure around 82Ω
5. Connect multimeter leads across studs label gray (GY) and white (W).
Resistance should measure around 75Ω
6. If mutlimeter measures open in either pair the gauge could have a problem.