LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2011 >> 2 Sport, 1.5 Z, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Symptom Troubleshooting [Engine Mechanical MZR 1.5] >> Engine Control System Operation Inspection >> Drive-by-wire Control System Inspection

Drive-by-wire Control System Inspection

Engine coolant temperature compensation inspection 

  1. Connect the M-MDS to the DLC-2.
  2. Access the following PIDs: (See ON-BOARD DIAGNOSTIC TEST .)
    • ECT1
    • IAT
    • RPM
  3. Verify that the engine is cold, then start the engine.
  4. Verify that the engine speed decreases as the engine warms up.

Load compensation inspection 

  1. Start the engine and idle it.
  2. Connect the M-MDS to the DLC-2.
  3. Verify that P0506:00 or P0507:00 is not displayed. (See ON-BOARD DIAGNOSTIC TEST .)
  4. Access the RPM PID. (See ON-BOARD DIAGNOSTIC TEST .)
    NOTE:
    • Excludes temporary idle speed drop just after the loads are turned on.
  5. Verify that the engine speed is within the specification under each load condition.
    • If load condition is not as specified, inspect the following:
      • A/C switch and related wiring harness
      • Fan switch and related wiring harness

Idle-up speed 

LOAD STATUS REFERENCE CHART

Load status Idle speed (rpm)
ATX: P, N position MTX: Neutral
No load 600-700
A/C on (With A/C) Refrigerant pressure switch (middle pressure) is off 600-700 650-750
Refrigerant pressure switch (middle pressure) is on 700-800
Electrical loads on Generator generating current value 32-40 A  600-700 650-750
above 40 A  700-800

Throttle position (TP) sweep inspection 

  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition to ON.
  3. Verify that none of the following DTCs are displayed: (See ON-BOARD DIAGNOSTIC TEST .)
    • P0122:00, P0123:00, P0222:00, P0223:00, P0638:00, P2101:00, P2107:00, P2108:00, P2109:00, P2112:00, P2119:00, P2122:00, P2123:00, P2127:00, P2128:00, P2135:00, P2138:00
      • If any one DTC is displayed, perform DTC inspection. (See DTC TABLE .)
  4. Access the TP REL PID. (See ON-BOARD DIAGNOSTIC TEST .)
  5. Verify that the PID reading is within the CTP value. (See PCM INSPECTION .)
    • If the PID reading is out of range, perform the following:
      • Remove the air duct from the throttle body.
      • Verify that the throttle valve opens when the accelerator pedal is depressed.
        • If the throttle valve opens, inspect the TP sensor and related wiring harness.
        • If the throttle valve does not open, inspect the throttle valve actuator control motor and related wiring harness.
  6. Gradually depress the throttle pedal and verify that the PID reading increases accordingly.
    • If the PID reading drops momentarily, inspect the following:
      • TP sensor
  7. Fully depress the throttle pedal and verify that the PID reading is within WOT value. (See PCM INSPECTION .)
    • If the PID reading is out of range, perform the followings:
      • Remove the air duct from throttle body.
      • Verify that the throttle valve opens when throttle pedal is depressed.
        • If the throttle valve opens, inspect the TP sensor and related wiring harness.
        • If the throttle valve does not open, inspect the throttle valve actuator control motor and related wiring harness.

Brake override system operation inspection 

NOTE:
  • If the brake override system operates normally after performing the following inspection, the PCM detects DTC P2299:00.
  1. Start the engine and idle it.
  2. Verify that the engine speed is below 1,100 rpm  while the all of the following conditions are met.
scientia non olet · About LEMON Manuals