Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSMAZDA2008CX-7 TOURING, 2.3 3, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISSYMPTOM TROUBLESHOOTING [ENGINE & FUEL)ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC]FUEL CUT CONTROL SYSTEM INSPECTION

2008 Mazda CX-7 Touring, 2.3 3, AWD

Fuel Cut Control System Inspection

2008 Mazda CX-7 Touring, 2.3 3, AWDSECTION Fuel Cut Control System Inspection

NOTE:

This inspection has to be performed after the Fuel Injector Operation Inspection.

If simulation function of M-MDS is used:

Warm up the engine and idle it.
Connect the M-MDS to the DLC-2.
Select the RPM and the FUELPW1 PIDs.
Monitor both PIDs while performing the following steps.
1. Depress the accelerator pedal and increase the RPM PID to 4,000 rpm .
2. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the FUELPW1 PID is 0 msec. , and 2-5 msec . when the RPM PID drops below 1,200 rpm .
  - If not as specified, inspect the following.
    - ECT sensor and related wiring harness
      (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION[L3 WITH TC] ).

If simulation function of M-MDS is not used:

Warm up the engine and idle it.
Measure the fuel injector control signal wave profile using the oscilloscope while performing the following steps.
1. Depress the accelerator pedal and increase the engine speed to 4,000 rpm .
2. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the wave profile constantB+ , and the wave appears when the engine speed drops below 1,200 rpm .
  (See PCM INSPECTION[L3 WITH TC] ).
  - If not as specified, inspect the following.
    - ECT sensor and related wiring harness
      (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION[L3 WITH TC] ).

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.