Load Compensation Inspection
- Start the engine and run it at idle.
- Connect WDS or equivalent to the DLC-2.
- Verify that P0506, P0507, or P0511 is not displayed. If P0506, P0507 or P0511 are displayed, perform DTC inspection. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
NOTE:
Excludes temporary idle speed drop just after the loads are turned on.
- Select RPM PID.
- Verify engine speed is within specification under each load condition. See ENGINE SPEED SPECIFICATIONS table. If load condition is not as specified, inspect following:
- A/C switch and related harness. Refer to appropriate MANUAL A/C-HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS articles in AIR CONDITIONING & HEATING.
- Fan switch and related harness. Refer to appropriate MANUAL A/C-HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS articles in AIR CONDITIONING & HEATING.
- Power Steering Pressure (PSP) switch and related harness. Refer to POWER STEERING PRESSURE SWITCH
under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article.
ENGINE SPEED SPECIFICATIONS
| Load Condition |
Engine Speed (RPM) |
| No Load |
600-700 |
| E/L Operating |
650-750 |
| P/S Operating |
650-750 |
| A/C Operating |
| Refrigerant Pressure Low |
700-800 |
| Refrigerant Pressure High |
700-800 |