Mazda 6 2002 Workshop Manual page 230

DTC P0340 Camshaft position (CMP) sensor circuit malfunction
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
2 VERIFY RELATED SERVICE INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related Service Information available?
3 VERIFY CMP SENSOR VOLTAGE
• Disconnect CMP sensor connector.
• Connect voltmeter between CMP sensor
connector terminals A and B (sensor-side).
• Inspect the voltage in AC range while cranking
the engine.
• Is any voltage reading?
4 INSPECT POOR CONNECTION OF CMP
SENSOR CONNECTOR
• Verify that the CMP sensor connector is
connected securely.
• Is connector okay?
5 INSPECT CMP CIRCUIT FOR SHORT TO
POWER
• Turn ignition key OFF.
• Disconnect CMP sensor connector.
• Turn ignition key ON (Engine OFF)
• Measure voltage at CMP sensor terminals A
and B.
• Is any voltage reading?
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to net step.
No Record FREEZE FRAME DATA on repair order, then go to
net step.
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to net step.
No Go to net step.
Yes Go to net step.
No Go to step 10.
Yes Go to net step.
No Reconnect the connector, then go to Step 11.
Yes Repair or replace suspected harness, then go to Step 11.
No Go to net step.
ACTION
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F