Dtc P0342 - Mazda Mazda6 Workshop Manual Supplement

DTC P0342

DTC P0342 CMP sensor circuit low input
• PCM monitors input signal from CMP sensor while engine is running. If input signal from CMP sensor is not
DETECTION
CONDITION input at 12 crankshaft revolutions, PCM determines CMP sensor circuit low input.
• CMP sensor malfunction
• Connector or terminal malfunction
• Short to GND in wiring between CMP sensor terminal A and PCM terminal 81
POSSIBLE
• Short to GND in wiring between CMP sensor terminal B and PCM terminal 55
CAUSE
• Open circuit in wiring between CMP sensor terminal A and PCM terminal 81
• Open circuit in wiring between CMP sensor terminal B and PCM terminal 55
• PCM malfunction
CMP SENSOR
3
HARNESS SIDE CONNECTOR
Diagnostic procedure
STEP
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related repair information available?
2 INSPECT POOR CONNECTION OF CMP
SENSOR CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
3 INSPECT CMP SENSOR CIRCUIT FOR SHORT
TO GND
• Turn engine switch to OFF.
• Inspect continuity between following
harnesses:
— CMP sensor terminal A and body GND.
— CMP sensor terminal B and body GND.
• Is there continuity?
ON-BOARD DIAGNOSTIC
A
B
CMP SENSOR
B A
INSPECTION
6
4 5
81
6
5
4
55
HARNESS SIDE CONNECTOR
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
Yes Repair or replace suspected terminal, go to Step 7.
No Go to next step.
Yes Repair or replace harness for short to GND, go to Step 7.
No Go to next step.
A6E407001082232
PCM
PCM
55 81
ACTION
F2–141
F2