Fuel Injector Inspection - Mazda Mazda6 Workshop Manual Supplement

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FUEL INJECTOR INSPECTION

Resistance Inspection
Note
• Perform the following test only when directed.
• Perform "Correction after Parts Installation" after replacing the fuel injector. (See
Parts Installation.)
1. Disconnect the negative battery cable.
2. Disconnect the fuel injector connectors.
3. Measure the resistance of the fuel injector using
an ohmmeter.
• If not as specified, replace the fuel injector.
(See F2–55 FUEL INJECTOR REMOVAL/
INSTALLATION.)
• If as specified, carry out the "Circuit Open/
Short Inspection".
Resistance
approx. 0.45 ohm
Circuit Open/Short Inspection
1. Disconnect the IDM connector.
2. Inspect the following wiring harnesses for an
open or short circuit (continuity check).
Open circuit
• If there is no continuity, the circuit is open. Repair
or replace the harness.
— No.1 cylinder fuel injector terminal B
(harness-side) and IDM terminal 1E.
— No.2 cylinder fuel injector terminal B
(harness-side) and IDM terminal 1G.
— No.3 cylinder fuel injector terminal B
(harness-side) and IDM terminal 1H.
— No.4 cylinder fuel injector terminal B
(harness-side) and IDM terminal 1F.
— No.1 cylinder fuel injector terminal D
(harness-side) and IDM terminal 1D.
— No.2 cylinder fuel injector terminal D (harness-side) and IDM terminal 1C.
— No.3 cylinder fuel injector terminal D (harness-side) and IDM terminal 1D.
— No.4 cylinder fuel injector terminal D (harness-side) and IDM terminal 1C
Short circuit
• If there is continuity, the circuit is short. Repair or replace the harness.
— No.1 cylinder fuel injector terminal B (harness-side) and GND.
— No.2 cylinder fuel injector terminal B (harness-side) and GND.
— No.3 cylinder fuel injector terminal B (harness-side) and GND.
— No.4 cylinder fuel injector terminal B (harness-side) and GND.
— No.1 cylinder fuel injector terminal D (harness-side) and power supply.
— No.2 cylinder fuel injector terminal D (harness-side) and power supply.
— No.3 cylinder fuel injector terminal D (harness-side) and power supply.
— No.4 cylinder fuel injector terminal D (harness- side) and power supply.
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F2–56
FUEL SYSTEM
A6E401213250202
F2–34 Correction after
B A
A6E40122021
C A
B
D
A6E40122020