Fuel Injector Inspection - Mazda 6 2002 Workshop Manual

(4) Lightly pull and push the quick release connector a few times by hand and verify that it can move 2.0—3.0
mm {0.08—0.11 in} and it is connected securely.
• If quick release connector does not move at all, verify that O-ring is not damaged and slipped, and
reconnect the quick release connector.
2. When the retainer is removed, perform the following procedure.
End Of Sie

FUEL INJECTOR INSPECTION

Operation Test
1. Carry out the “Fuel Injector Operation Inspection”. (See
• If not as specified, perform the further inspection for the fuel injectors.
Resistance Inspection
Note
• Perform the following test only when directed.
1. Turn the ignition switch to LOCK position.
2. Disconnect the negative battery cable.
3. Disconnect the fuel injector connectors.
4. Measure the resistance of the fuel injector using
an ohmmeter.
• If not as specified, replace the fuel injector.
(See F–28 FUEL INJECTOR REMOVAL/
INSTALLATION.)
• If as specified but “Operation Test” is failed,
carry out the “Circuit Open/Short Inspection”.
Inspect for open or short circuit.
Resistance
11.4—12.6 ohms [20 ° ° ° ° C {68 ° ° ° ° F}]
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See
REMOVAL/INSTALLATION.)
2. Inspect the following wiring harness for open or
short (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 PCM terminal 4Z.
— No.2 cylinder fuel injector terminal B
(harness-side) and PCM terminal 4W.
— No.3 cylinder fuel injector terminal B
(harness-side) and PCM terminal 4AD.
— No.4 cylinder fuel injector terminal B (harness-side) and PCM terminal 4AA.
— No.1 cylinder fuel injector terminal A (harness-side) and main relay (harness-side) terminal C through
common connector.
— No.2 cylinder fuel injector terminal A (harness-side) and main relay (harness-side) terminal C through
common connector.
— No.3 cylinder fuel injector terminal A (harness-side) and main relay (harness-side) terminal C through
common connector.
— No.4 cylinder fuel injector terminal A (harness-side) and main relay (harness-side) terminal C through
common connector.
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 body GND.
— No.2 cylinder fuel injector terminal B (harness-side) and body GND.
— No.3 cylinder fuel injector terminal B (harness-side) and body GND.
— No.4 cylinder fuel injector terminal B (harness-side) and body GND.
— No.1 cylinder fuel injector terminal A (harness-side) and power supply.
FUEL SYSTEM
F–231 Fuel Injector Operation
F–43 PCM
A6E391213250W02
Inspection.)
A6E3912W007
A6E3912W008
F–31
F