Resistance Inspection; Circuit Open/Short Inspection [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• If it cannot be verified, inspect the PCM input signal circuit.
- Load/no load detection signal (neutral/CPP switch (MTX), TR switch (ATX))

Resistance Inspection

1. Turn the ignition switch to the LOCK position.
2. Disconnect the negative battery cable.
3. Disconnect the fuel injector connector.
4. Inspect the resistance between fuel injector terminals A and B using a tester.
LF
Z6
• If within the specification, perform the "Circuit Open/Short Inspection".
• If not within the specification, replace the fuel injector.
Standard
LF: 11.4-12.6 ohms [20 °C {68 °F}]
Z6: Approx. 13.8 ohms [20 °C {68 °F}]

Circuit Open/Short Inspection [LF]

1. Disconnect the PCM connector. (See
2. Inspect the following wiring harnesses for an open or short circuit (continuity check).
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[LF].)
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