Inspection Signal (Turbo)
- Remove intercooler and disconnect intake air temperature sensor connector. See Fig 1
. Attach a 3500-ohm resistor across terminals of connector. Reinstall intercooler.
- Connect voltmeter across Black and Blue wire terminals of fuel pump connector. DO NOT
remove connector while checking voltage.
- Start and warm engine to normal operating temperature. Turn off ignition. Restart engine. Check that 12 volts exists for approximately 50 seconds and then decreases to approximately 9 volts after 50 seconds. Check fuel pump resistor relay, ECU unit and wiring harness if voltage is not correct.
Courtesy of MAZDA MOTORS CORP.