Mazda 6 Workshop Manual page 118

Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 VERIFY CURRENT SIGNAL STATUS: IS
CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME
DATA
• Is DTC P0204 on FREEZE FRAME DATA?
5 INSPECT IDM CONNECTOR FOR POOR
CONNECTION
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/
pulled-out terminals, corrosion).
• Is there any malfunction?
6 INSPECT IDM FOR SHORT TO GND
• Turn the engine switch off.
• Inspect the continuity between the following
terminals and body GND.
— IDM terminal 2E (wiring harness-side)
— IDM terminal 1F (wiring harness-side)
• Is there continuity?
7 INSPECT IDM FOR SHORT TO POWER
• Turn the engine switch to the ON position
(Engine off).
• Inspect the voltage between the following
terminals and body GND.
— IDM terminal 2E (wiring harness-side)
— IDM terminal 1F (wiring harness-side)
• Is the voltage B+?
8 INSPECT FUEL INJECTOR NO.4 CONNECTOR
FOR POOR CONNECTION
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/
pulled-out terminals, corrosion).
• Is there any malfunction?
9 INSPECT FOR OPEN CIRCUIT BETWEEN IDM
AND FUEL INJECTOR NO.4
• Turn the engine switch off.
• Inspect for continuity between IDM terminal 1F
(wiring harness-side) and fuel injector terminal
B (wiring harness-side).
• Is there continuity?
10 INSPECT FUEL INJECTOR
• Inspect fuel injector No.4.
• Is there any malfunction?
11 INSPECT IDM
• Inspect the IDM.
• Is there any malfunction?
12 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/
pulled-out terminals, corrosion).
• Is there any malfunction?
F2–106
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
Yes Perform repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the next step.
No Intermittent concern exists.
Perform the "INTERMITTENT CONCERNS
TROUBLESHOOTING".
Yes Go to the next step.
No Go to the troubleshooting procedures for the DTC in the
FREEZE FRAME DATA.
Yes Repair or replace the suspected terminal, then go to Step
14.
No Go to the next step.
Yes Repair or replace the wiring harness for a short to GND,
then go to Step 14.
No Go to the next step.
Yes Repair or replace the wiring harness for a short to power,
then go to Step 14.
No Go to the next step.
Yes Repair or replace the suspected terminal, then go to Step
14.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 14.
Yes Replace fuel injector No.4, then go to Step 14.
No Go to the next step.
Yes Replace the IDM, then go to step 14.
No Go to the next step.
Yes Repair or replace the suspected terminal, then go to Step
14.
No Go to the next step.
ACTION