Acceleration Malfunction: Notes

ACCELERATION MALFUNCTION - SKYACTIV-G (US) TROUBLESHOOTING REFERENCE

Troubleshooting item	Acceleration malfunction
Description	Acceleration from i-stop is not smooth. Suppresses (shock) when accelerating vehicle from i-stop. Engine vibration increases when engine is restarted.
Possible cause	NOTE: MTX vehicles are not included because the driver releases the brake pedal and depresses the clutch pedal to accelerate. Hill launch assist function system (DSC) malfunction False detection of inclination angle (cannot calculate correct road slope) Low-G sensor (built-into SAS control module) malfunction (In this case, the SAS control module records DTCs C0061:29 and C0062:29.) Low-G sensor (built-into SAS control module) initialization malfunction (In this case, the SAS control module records DTC U2100:00.) False detection of brake fluid pressure Brake fluid pressure sensor (built-into electronically controlled brake unit) malfunction Cannot maintain brake fluid pressure Electronically controlled brake unit malfunction ATX system malfunction Electric AT oil pump malfunction (operation malfunction, insufficient pressure) Electric AT oil pump relay malfunction (stuck open) Short to ground or open circuit in electric AT oil pump relay power supply circuit Electric AT oil pump connector or terminals malfunction Open circuit in electric AT oil pump ground circuit Short to ground in electric AT oil pump power supply circuit Open circuit in electric AT oil pump power supply circuit TCM connector or terminals malfunction Short to ground in any of the following circuits. TCM power supply circuit TCM signal circuit Open circuit in any of the following circuits. TCM power supply circuit TCM signal circuit Electric AT oil pump malfunction TCM malfunction ATX malfunction
Courtesy of MAZDA MOTORS CORP.

Troubleshooting item

Acceleration malfunction

Description

Acceleration from i-stop is not smooth.
Suppresses (shock) when accelerating vehicle from i-stop.
Engine vibration increases when engine is restarted.

Possible cause

NOTE:

MTX vehicles are not included because the driver releases the brake pedal and depresses the clutch pedal to accelerate.

Hill launch assist function system (DSC) malfunction

False detection of inclination angle (cannot calculate correct road slope)
- Low-G sensor (built-into SAS control module) malfunction (In this case, the SAS control module records DTCs C0061:29 and C0062:29.)
- Low-G sensor (built-into SAS control module) initialization malfunction (In this case, the SAS control module records DTC U2100:00.)
False detection of brake fluid pressure
- Brake fluid pressure sensor (built-into electronically controlled brake unit) malfunction
Cannot maintain brake fluid pressure
- Electronically controlled brake unit malfunction

ATX system malfunction

Electric AT oil pump malfunction (operation malfunction, insufficient pressure)
- Electric AT oil pump relay malfunction (stuck open)
- Short to ground or open circuit in electric AT oil pump relay power supply circuit
- Electric AT oil pump connector or terminals malfunction
- Open circuit in electric AT oil pump ground circuit
- Short to ground in electric AT oil pump power supply circuit
- Open circuit in electric AT oil pump power supply circuit
- TCM connector or terminals malfunction
- Short to ground in any of the following circuits.
  - TCM power supply circuit
  - TCM signal circuit
- Open circuit in any of the following circuits.
  - TCM power supply circuit
  - TCM signal circuit
- Electric AT oil pump malfunction
- TCM malfunction
ATX malfunction

Courtesy of MAZDA MOTORS CORP.