WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Connect the WDS or equivalent to the DLC-2.
Verify that DTC P1686, P1687, or P1688 is not displayed.
- If DTC P1686, P1687, P1688 are displayed, perform DTC inspection.
  (See DTC TABLES .)
Verify that the metering oil pump motor coil resistance is as specified.
(See METERING OIL PUMP RESISTANCE INSPECTION .)
Verify that there is continuity between the metering oil position switch terminal A and C.
Measure the voltage of PCM terminal 2N at idle.
Specification

0 V
- If not as specified, inspect for the following wiring harnesses and connectors:
  - Between PCM terminal 2N and metering oil pump position switch terminal A
  - Between PCM terminal 1U and metering oil pump position switch terminal C
Inspect for the following and repair or replace according to inspection results.
- Oil pipe (leakage or crack between metering oil pump and oil nozzle)
- Oil nozzle
- Air bleed hose (leakage, clogged, damage or poor connection)

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Metering Oil Pump Control Inspection

Use the Manual With the Right Hardware

When to See a Mechanic

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