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HOMESERVICE MANUALSMAZDA2008TRIBUTE S SPORT, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERYSYMPTOM TROUBLESHOOTING [ENGINE/FUEL - EXCEPT HYBRID]INTAKE MANIFOLD TUNING VALVE (IMTV) SYSTEM
2008 Mazda Tribute s Sport, 4WD

Intake Manifold Tuning Valve (IMTV) System

2008 Mazda Tribute s Sport, 4WDSECTION Intake Manifold Tuning Valve (IMTV) System
PROBLEM SYMPTOMS CHART - INTAKE MANIFOLD TUNING VALVE (IMTV) SYSTEM

DTC P0660, P2070, P2071 INTAKE MANIFOLD TUNING VALVE (IMTV)
DETECTION CONDITION
  • All listed DTCs are specific to IMTV system.
POSSIBLE CAUSE
  • Air cleaner assembly
  • Air inlet tube
  • Clean air tub hose and resonator
  • Intake manifold tuning valve (IMTV) also includes the long short runner control (LSRC)
  • IMTV electric actuator assembly
  • Harness: IMTV, MONITOR, SIGNAL and VPWR
  • PCM failure
HINT IMTV Sensor Description 
  • The IMTV system allows greater engine performance from small displacement engines.
    • When commanded by the PCM, the IMTV solenoid moves, causing intake runner length to change based on PCM parameters.
G05463700
INSPECTION CHART - INTAKE MANIFOLD TUNING VALVE (IMTV) SYSTEM

STEP INSPECTION ACTION
1 PCM QUICK TEST
  • Was PCM Quick Test carried out? 
 Yes GO to the next step.
No CARRY OUT the PCM Quick Test. See PCM QUICK TEST  .
2 VISUAL INSPECTION
  • Carefully inspect the following areas for potential concerns:
    • IMTV valve linkage
    • IMTV valve return spring
  • Manually open and close IMTV plates at intake manifold and check for sticking or binding.
  • Is a mechanical concern detected? 
 Yes REPAIR as necessary.
GO to the next step.
No GO to step 4.
3 CHECK IMTV FOR MECHANICAL OPERATION
  • Disconnect IMTV linkage, or remove actuator assembly from manifold.
  • Rotate IMTV plate lever fully open to fully closed, contacting both limits.
  • Check for sticking or binding during rotation.
  • Is a mechanical concern detected? 
 Yes CLEAN or REPAIR IMTV manifold.
GO to step 12.
No INSTALL a new IMTV actuator.
GO to step 12.
4 CHECK FUNCTIONALITY OF IMTV
WARNING:
  • Keep fingers clear of mechanism.
RENDER: 1.0x

NO RELATED

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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.