Trouble Code 21 (Speed Signal n-mot [TR])

SPEED SIGNAL n-mot (TR)
Explanation
This detect code is stored when the control unit receives no engine speed signal.

Effect of Defect
Mechanical emergency program

Possible Cause
Wire to Pin 21 detective or wire to Digital Motor Electronic (DME) control unit Pin 3 detective.

Troubleshooting
Follow displayed scan tool instructions.