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Vehicle Moves When Accelerating From Standstill On Slope: Notes
VEHICLE MOVES WHEN ACCELERATING FROM STANDSTILL ON SLOPE (SKYACTIV-G) DESCRIPTION AND POSSIBLE CAUSE
| Troubleshooting item |
Vehicle moves when accelerating from standstill on slope |
| Description |
- Vehicle slips backwards on inclined road surface when accelerating after i-stop operates.
|
| Possible cause |
NOTE:
- MTX vehicles do not have the Hill Launch Assist function from i-stop because the driver controls the brake pressure.
- i-stop (engine-stop control) continues operating when shifting the selector lever from D position to N or P position while i-stop (engine-stop control) is operating, however, if the slope ol the road surface is within ±4%, the Hill Launch Assist (HLA) function is canceled.
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
- Low-G sensor (built-into SAS control module) initialization malfunction
- False detection of brake fluid pressure
- Brake fluid pressure sensor (built-into DSC HU/Control Module) malfunction (without Mazda M Hybrid)
- Brake fluid pressure sensor (built-into electronically controlled brake unit) malfunction (with Mazda M Hybrid)
- Cannot maintain brake fluid pressure
- DSC HU/Control Module malfunction (without Mazda M Hybrid)
- Electronically controlled brake unit malfunction (with Mazda M Hybrid)
- DC-DC converter system error (exceeds capacity of DC-DC converter output due to open or short circuit in wiring harness and after-market electrical part)
ATX system malfunction
- Electric AT oil pump malfunction (operation malfunction, insufficient pressure)
- ATX malfunction
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| System wiring diagram |
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| Connector diagram |
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VEHICLE MOVES WHEN ACCELERATING FROM STANDSTILL ON SLOPE (SKYACTIV-G - US) DESCRIPTION AND POSSIBLE CAUSE
| Troubleshooting item |
Vehicle moves when accelerating from standstill on slope |
| Description |
- Vehicle slips backwards on inclined road surface when accelerating after i-stop operates.
|
| Possible cause |
NOTE:
- MTX vehicles do not have the Hill Launch Assist function from i-stop because the driver controls the brake pressure.
- i-stop (engine-stop control) continues operating when shifting the selector lever from D position to N or P position while i-stop (engine-stop control) is operating, however, if the slope of the road surface is within ±4%, the Hill Launch Assist (HLA) function is canceled.
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
- Low-G sensor (built-into SAS control module) initialization malfunction
- 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
- DC-DC converter system error (exceeds capacity of DC-DC converter output due to open or short circuit in wiring harness and after-market electrical part)
ATX system malfunction
- Electric AT oil pump malfunction (operation malfunction, insufficient pressure)
- ATX malfunction
|
| System wiring diagram |
|
| Connector diagram |
|