Mazda RX-8 Manual page 226

Metering Oil Pump Control Inspection
1. Connect the WDS or equivalent to the DLC-2.
2. Verify that DTC P1686, P1687 or P1688 is not displayed.
If DTC P1686, P1687, P1688 are displayed, perform DTC inspection.
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(See DTC TABLE .)
3.
4. Verify that the metering oil pump motor coil resistance is as specified.
(See Metering Oil Pump Resistance Inspection .)
5. Verify that there is continuity between the metering oil position switch terminal A and C.
6. Measure the voltage of PCM terminal 2N at idle.
Specification
0 V
o
If not as specified, inspect for the following wiring harnesses and connectors:
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Between PCM terminal 2N and metering oil pump position switch terminal A
Between PCM terminal 1U and metering oil pump position switch terminal C
7. Inspect for the following and repair or replace according to inspection results.
Oil pipe (leakage or crack between metering oil pump and oil nozzle)
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Oil nozzle
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Air bleed hose (leakage, clogged, damage or poor connection)
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(w) RX8-Engine Troubleshooting
Page 177