Mazda 6 Workshop Manual page 135

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 same DTC present?
4 INSPECT CMP SENSOR 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 CMP SENSOR CIRCUIT FOR SHORT
TO GND
• Turn the engine switch off.
• Inspect for continuity between the following
terminals and body GND:
— CMP sensor terminal A and body GND.
— CMP sensor terminal B and body GND.
• Is there continuity?
6 INSPECT CMP SENSOR
• Inspect the CMP sensor.
• Is there any malfunction?
7 INSPECT CMP SENSOR AIR GAP
• Measure the CMP sensor air gap.
• Is the CMP sensor air gap normal?
Specification
0.5—1.5 mm {0.020—0.059 in}
8 INSPECT CMP SENSOR PULSAR
• Inspect the CMP sensor pulsar for damage
and/or cracks.
• 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 CMP SENSOR FOR OPEN CIRCUIT
• Turn the engine switch off.
• Inspect for continuity between the following
terminals:
— CMP sensor terminal A and PCM terminal
81.
— CMP sensor terminal B and PCM terminal
55.
• Is there continuity?
11 VERIFY TROUBLESHOOTING OF DTC P0342
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.
• 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 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 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 Replace the CMP sensor, go to Step 11.
No Go to the next step.
Yes Go to the next step.
No Replace the CMP sensor, then go to Step 11.
Yes Replace the camshaft, then 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
F2–123
F2