DTC 47

Code 47: Left Front Motor Free Spins (Part 1 Of 2).:

Code 47: Left Front Motor Free Spins (Part 2 Of 2).:

DTC 47 Left Front Motor Free Spins:

Circuit Description:
This DTC is designed to detect a stripped nut or gear assembly during initialization. During the homing sequence, the piston should reach the top of the bore resulting in a stalled motor. If this does not occur, the motor must be spinning with little or no resistance, indicating a nut/screw or gear malfunction.

DTC Will Set When:
DTC 47 can only be set during initialization. If the feedback current is less than the command current for a specified period to time, a malfunction exists.

Action Taken:
A malfunction DTC is stored, ABS is disabled, and the ABS indicator lamp is turned "ON."

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Compares feedback current to command current during apply.
2. Compares feedback current to command current during release.
3. Moves the piston to the top of the bore.
4. Checks for excessive resistance in the left front motor high circuit.
5. Checks for excessive resistance in the left front motor low circuit.
6. Checks for resistance in the left front motor.
7. Checks for a stripped motor pack gear.
8. Checks for a stripped hydraulic modulator gear.
9. Checks for proper operation of motor pack.
10. Checks for proper operation of the hydraulic modulator.
11. Ensures malfunction was not due to poor terminal contact.

Diagnostic Aids:
An "intermittent" malfunction in this DTC may result from a mechanical part of the system that sticks, binds, or slips.

The frequency of the malfunction can be checked by using the enhanced diagnostic function of the Tech 1.

If DTC 47 only occurs once and DTC 56 also occurs, see DTC 56. If intermittent and enhanced diagnostics shows DTC 47 occurs during ABS, see DTC 56.

Depending on the frequency of the malfunction, a physical inspection of the mechanical parts suspected may be necessary.