MX-5 Miata LS L4-1.8L DOHC (2001)
Fuel Tank Pressure Sensor: Testing and Inspection
NOTE: Perform the following test only when directed.
1. Inspect the FTP sensor for damage and cracks.
2. Inspect the vacuum hose for improper routing, kinks or leaks.
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If the above are okay, perform the "Circuit Open/Short inspection".
3. Reconnect the FTP sensor connector.
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If the above open or short circuit are correct, replace FTP sensor.
Circuit Open/Short Inspection
Open circuit
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If there is no continuity, the circuit is open. Repair or replace the harness.
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FTP sensor connector terminal A and PCM connector 4AB through common connector.
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Reference voltage circuit (FTP sensor connector terminal C and PCM connector terminal 4L through common connector.)
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GND circuit (FTP sensor connector terminal B and PCM connector terminal 4O through common connector.)
Short circuit
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If there is continuity, the circuit is shorted. Repair or replace the harness.
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FTP sensor connector terminal A and PCM connector terminal 4AB through common connector to GND.
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FTP sensor connector terminal C and PCM connector terminal 4L through common connector to GND.
