DTC P0340:00: Notes
DTC P0340:00 (L3 WITH TC) DETECTION CONDITION & POSSIBLE CAUSES
| DTC P0340:00 |
CMP sensor circuit malfunction |
| DETECTION CONDITION |
- The PCM monitors the input voltage from the CMP sensor when the engine is running. If the PCM does not receive the input voltage from the CMP sensor while the PCM receives the input signal from the CKP sensor, the PCM determines that the CMP sensor circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (CCM).
- The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- CMP sensor connector or terminals malfunction
- Short to ground or open circuit in CMP sensor power supply circuit
- Short to ground in wiring harness between main relay terminal C and CMP sensor terminal A
- ENG INJ 15 A fuse malfunction
- Open circuit in wiring harness between main relay terminal C and CMP sensor terminal A
- Short to ground in wiring harness between CMP sensor terminal C and PCM terminal 2S
- PCM connector or terminals malfunction
- Short to power supply in wiring harness between CMP sensor terminal C and PCM terminal 2S
- CMP sensor signal circuit and ground circuit are shorted to each other.
- Open circuit in wiring harness between the following terminals:
- CMP sensor terminal C-PCM terminal 2S
- CMP sensor terminal B-PCM terminal 2P
- CMP sensor malfunction
- CMP sensor pulse wheel malfunction
- CMP sensor is dirty
- CKP sensor not installed correctly
- Timing chain not installed correctly
- Loose timing chain or improper valve timing
- Loose camshaft sprocket lock bolt
- Loose crankshaft pulley lock bolt
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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