DTC P1687: Notes
DTC P1687 DETECTION & CONDITION POSSIBLE CAUSES
| DTC P1687 |
Metering oil pump control circuit high flow side problem |
| DETECTION CONDITION |
- The PCM monitors the input signal from the metering oil pump switch when the metering oil pump stepping motor is less than the standard step. If the input signal is on, the PCM determines that the metering oil pump control circuit has a problem on the high flow side.
Diagnostic support note
- This is a continuous monitor (CCM).
- The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
- PENDING CODE is available if the PCM detects the above malfunction condition.
- FREEZE FRAME DATA is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Metering oil pump malfunction
- Metering oil pump switch malfunction
- Connector or terminal malfunction
- Open circuit in wiring harness between main relay terminal C and metering oil pump terminal C
- Short to ground in wiring harness between main relay terminal C and metering oil pump terminal C
- Open circuit in wiring harness, between main relay terminal C and metering oil pump terminal D
- Short to ground in wiring harness between main relay terminal C and metering oil pump terminal D
- Open circuit in wiring harness between metering oil pump terminal A and PCM terminal 2V
- Short to ground in wiring harness between metering oil pump terminal A and PCM terminal 2V
- Open circuit in wiring harness between metering oil pump terminal E and PCM terminal 2W
- Short to ground in wiring harness between metering oil pump terminal E and PCM terminal 2W
- Open circuit in wiring harness between metering oil pump terminal B and PCM terminal 2Y
- Short to ground in wiring harness between metering oil pump terminal B and PCM terminal 2Y
- Open circuit in wiring harness between metering oil pump terminal F and PCM terminal 2AB
- Short to ground in wiring harness between metering oil pump terminal F and PCM terminal 2AB
- Short to ground in wiring harness between metering oil pump switch terminal A and PCM terminal 2N
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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