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Home >> Mazda >> 2003 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0507: Idle Control System, Rpm Greater Than Expected >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Mazda Protege5 and 2002 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Connect scan tool to DLC-2. Turn ignition on, engine off. Monitor for FREEZE FRAME DATA and ensure data has been recorded. Check service bulletins for repair information related to this DTC. If repair information is not available, go to next step. If repair information is available, perform diagnosis and repair as necessary. After repair, go to step  8.
  2. Turn ignition switch off and then start engine. Using scan tool, check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If any other DTCs are present, go to appropriate test and repair first. If no other DTCs are present, go to next step.
  3. Perform IAC valve inspection. See IDLE AIR CONTROL VALVE under IDLE CONTROL in SYSTEM & COMPONENT TESTING - MIATA, MILLENIA, MPV, PROTEGE, PROTEGE5 & 626 article. If IAC valve is okay, go to next step. If IAC valve is faulty, replace IAC valve. After repair, go to step  8.
  4. Turn ignition switch off. Check accelerator cable free play. Ensure throttle valve is at closed position. Throttle cable free play should be .04-.11" (1-3 mm). If cable adjustment is okay, go to next step. If cable adjustment is needed, unlock White locking tab "A". Unlock stopper "B". If stopper "B" will not unlock, it may be necessary to carefully bend tab "C" out. To adjust free play, push or pull accelerator cable housing directly behind spring. See Fig 1. Turn stopper "B" to lock position. Ensure throttle cable free play is within specification. Move White locking tab "A" to lock position. Ensure correct accelerator operation. After accelerator cable adjustment is complete, go to step  8.
    Fig 1: Adjusting Accelerator Cable
    G00042187Courtesy of MAZDA MOTORS CORP.
  5. Check cruise control actuator cable free play. If adjustment is okay, go to next step. If adjustment is necessary, push or pull actuator cable directly behind spring 2 times. Turn ratchet ring and slide lock lever as indicated. See Fig 2. After actuator cable adjustment is complete, go to step  8.
    Fig 2: Adjusting Cruise Control Actuator Cable
    G00042186Courtesy of MAZDA MOTORS CORP.
  6. Check vacuum hose routing. If vacuum hoses are routed properly, go to next step. If vacuum hoses are not routed properly, repair as necessary. See VACUUM DIAGRAMS article. After repair, go to step  8.
  7. Check throttle body. If throttle body is fully closed, go to next step. If throttle body is damaged or stuck, clean or replace throttle body. After repair, go to next step.
  8. Reconnect all connectors. Start engine. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Depress brake pedal for 14.1 seconds or more. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If DTC P0507 is present, replace PCM and go to next step. If DTC P0507 is not present, go to next step.
  9. Cycle ignition switch from off to on. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If no other DTCs are present, testing is complete. If any other DTC is present, go to applicable test and repair.
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