Mazda 6 Workshop Manual page 157

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 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 PENDING CODE for this DTC present?
4 INSPECT CRUISE CONTROL SWITCH
CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/
pulled-out terminals, corrosion).
• Is there any malfunction?
5 INSPECT CRUISE CONTROL SWITCH SIGNAL
CIRCUIT FOR SHORT TO GND
• Turn the engine switch off.
• Inspect for continuity between cruise control
switch terminal B and body GND.
• Is there continuity?
6 INSPECT CRUISE CONTROL SWITCH WIRING
HARNESSES FOR SHORT WITH EACH OTHER
• Turn the engine switch off.
• Inspect for continuity between cruise control
switch terminals B and C.
• Is there continuity?
7 INSPECT CRUISE CONTROL SWITCH SIGNAL
CIRCUIT FOR OPEN CIRCUIT
• Turn the engine switch to the ON position.
(Engine off)
• Inspect the voltage at cruise control switch
terminal B (harness side).
• Is the voltage below 1.0 V?
8 INSPECT CRUISE CONTROL SWITCH
• Inspect the cruise control switch.
• Is there any malfunction?
9 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?
10 INSPECT CRUISE CONTROL SWITCH GND
CIRCUIT FOR OPEN CIRCUIT
• Turn the engine switch off.
• Inspect for continuity between cruise control
switch terminal C and PCM terminal 91.
• Is there continuity?
11 VERIFY TROUBLESHOOTING OF DTC P0564
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine and idle it for 120 s or more.
• Is the same DTC present?
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
Service Information.
• If 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 Repair or replace the suspected terminal, go to Step 11.
No Go to the next step.
Yes Repair or replace the wiring harness for a short to GND, go
to Step 11.
No Go to the next step.
Yes Repair or replace the wiring harness for a short with each
other, go to Step 11.
No Go to the next step.
Yes Repair or replace the wiring harness for an open circuit, go
to Step 11.
No Go to the next step.
Yes Replace the cruise control switch, go to Step 11.
No Go to the next step.
Yes Repair or replace the suspected terminal, go to Step 11.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit, go
to the next step.
Yes Replace the PCM, go to the next step.
No Go to the next step.
ACTION
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F2