DTC U0121:00 [TCM (EV6A-EL, EV6AX-EL) (E)]
id0502r39084r5
Outline
|
System malfunction location |
Communication error to DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid) |
|
|---|---|---|
|
Detection condition
|
• Under the following condition, the TCM cannot receive the signal from DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid):
|
|
|
Fail-safe
|
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
|
|
|
Possible cause
|
• CAN communication line malfunction between TCM and DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid)
• TCM malfunction
|
|
|
System wiring diagram
|
• Not applicable
|
|
|
Connector diagram
|
• Not applicable
|
|
Diagnostic Procedure