Mazda CX-7 2007 Workshop Manual page 148

STEP
3 INSPECT FUEL INJECTOR NO.4 CONNECTOR
FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the fuel injector No.4 connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
4 INSPECT FUEL INJECTOR NO.4 CIRCUIT FOR
SHORT TO GROUND
• Turn the ignition switch off.
• Inspect for continuity between the following
terminals:
— Fuel injector No.4 terminal B (wiring
harness-side) and body ground
— Fuel injector No.4 terminal A (wiring
harness-side) and body ground
• Is there continuity?
5 INSPECT FUEL INJECTOR NO.4 CIRCUIT FOR
SHORT TO POWER SUPPLY
• Turn the ignition switch to the ON position
(Engine off).
• Measure the voltage between the fuel injector
No.4 terminal A (wiring harness-side) and body
ground.
• Is the voltage B+?
6 INSPECT FUEL INJECTOR NO.4
• Inspect fuel injector No.4.
(See01-14-27 FUEL INJECTOR
INSPECTION[L3 WITH TC].)
• Is there any malfunction?
7 INSPECT PCM
• Inspect the PCM.
• Is there any malfunction?
8 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
9 INSPECT FUEL INJECTOR NO.4 CIRCUIT FOR
OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between the following
terminals:
— Fuel injector No.4 terminal B (wiring
harness-side) and PCM terminal 2BG
(wiring harness-side)
— Fuel injector No.4 terminal A (wiring
harness-side) and PCM terminal 2AZ
(wiring harness-side)
• Is there continuity?
10 VERIFY TROUBLESHOOTING OF DTC P0204
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn the ignition switch to the ON position.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
11 VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
01-02–106
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Repair or replace the terminal, then go to Step 10.
No Go to the next step.
Yes Repair or replace the wiring harness for a possible short to
ground, then go to Step 10.
No Go to the next step.
Yes Repair or replace the wiring harness for a possible short to
power supply, then go to Step 10.
No Go to the next step.
Yes Replace fuel injector No.4, then go to Step 10.
(See01-14-23 FUEL INJECTOR REMOVAL/
INSTALLATION[L3 WITH TC].)
No Go to the next step.
Yes Replace the PCM, then go to Step 10.
No Go to the next step.
Yes Repair or replace the terminal, then go to Step 10.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for a possible open
circuit, then go to the next step.
Yes Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No DTC troubleshooting completed.
ACTION