2005 Mazda Tribute s, FWDFACTORY OEM SERVICE PROCEDURE

Fast Idle

FAST IDLE DESCRIPTION

5 FAST IDLE
DESCRIPTION
  • Engine speed continues at fast idle after engine warm-up
UNIQUE IDLE CONCERN INSPECTION/ACTION CHART

STEP INSPECTION ACTION
1 VERIFY ENGINE OPERATES AT NORMAL OPERATING TEMPERATURE
NOTE:
  • If vehicle runs normally after the ignition key is turned off, check for damaged ignition switch, IGN RUN circuit short to power, VPWR circuit short to power, etc.
  • The ECT/CHT PID at normal operating temperature should read between 112° C (234°F) and 73°C (163°F).
  • Does engine appear to be either overheating or not reaching normal operating temperature? 
 Yes See SYMPTOM TROUBLESHOOTING CHART - ENGINE COOLING SYSTEM  .
No Go to next step.
2 PRELIMINARY CHECKS
  • Perform the following preliminary checks:
    • Vacuum leaks.
    • Throttle plate and linkage.
    • Cruise control linkage binding/sticking.
    • Intake air tube (leaks).
    • Proper sealing of intake manifold and components attached to intake air (such as the EGR valve or IAC valve).
  • Are all checks OK? 
 Yes Go to next step.
No Service as necessary. Verify symptom no longer exists.
3 PERFORM PCM QUICK TEST
See PCM QUICK TEST  .
  • Are any DTCs displayed during Continuous Memory, Key On Engine Off (KOEO) or Key On Engine Running (KOER) Self-Tests? 
 Yes Check for cause.
See DIAGNOSTIC TROUBLE CODE NUMBERS  .
No Go to next step.
4 CHECK THROTTLE POSITION (TP) SENSOR
  • Key ON, Engine OFF (KOEO).
  • Monitor TP PID while wiggling TP sensor circuits.
  • Is TP V PID changing below the minimum 0.53 volts or above the maximum 1.27 volts? 
 Yes Possible TP sensor concern.
Go to step 2 of 01-01 THROTTLE POSITION (TP) SENSOR CIRCUIT MALFUNCTION, page 01-01-104
No Go to next step.
5 CHECK FOR BASE ENGINE AIR LEAKS
  • Check for base engine air leaks (such as intake manifold gasket air leaks).

    See ENGINE  .

  • Is a fault indicated? 
 Yes Service as required.
No Go to next step.
6
  • Verify test results. If OK, DIAGNOSTIC INDEX  to service any additional symptoms.
Factory Service Tools

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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.