Mazda CX-9 Grand Touring 2009 Manual page 1638

NOTE:
Perform the following inspection only when directed.
OPERATION TEST
1. Carry out the "Fuel Injector Operation Inspection". (See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-3.7] .)
If not as specified, perform the further inspection for the fuel injectors.
RESISTANCE INSPECTION
1. Turn the ignition switch to LOCK position.
2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
3. Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7] .)
4. Remove the dynamic chamber. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-
3.7] .)
5. Disconnect the fuel injector connectors.
6. Measure the resistance of the fuel injector.
If not as specified, replace the fuel injector. (See FUEL INJECTOR
REMOVAL/INSTALLATION [MZI-3.7].)
If as specified but "Operation Test" is failed, carry out the "Circuit Open/Short Inspection". Inspect
for open or short circuit.
Fuel injector resistance
11-18 ohms
Fig. 47: Identifying Fuel Injector Connectors
Courtesy of MAZDA MOTORS CORP.
CIRCUIT OPEN/SHORT INSPECTION
1. Disconnect the PCM connector.
2. Inspect the following wiring harness for open or short (continuity check).
2008 Mazda CX-9 Grand Touring
2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9