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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. It this does not occur, the motor must be spinning with little or no resistance. This indicates a nut/screw or gear malfunction.

FAILURE CONDITION:
DTC 47 can only be set during initialization. If the feedback current is less than the command current for a specified period of time, a malfunction exists.

ACTION TAKEN:
A DTC 47 is stored, ABS is disabled and the "ABS" warning light is turned on.

TEST DESCRIPTION:
Number(s) below refer to circled Number(s) on the diagnostic chart,
1. This step checks to see if the corresponding open motor DTC is also set.
2. This step verifies that the motor was actually applied as commanded by observing feedback current.
3. This step verifies that the motor can release.
4. This step verifies that the motor can be applied by observing pedal movement.
5. This step checks for a stripped gear on the motor pack.
6. This step checks for a stripped gear on the hydraulic modulator.
7. This step checks for a malfunctioning EBCM.

DIAGNOSTIC AIDS:
An "intermittent" malfunction of this DTC may be caused by a sticking, binding or slipping mechanical part of the system.
The frequency of the malfunction can be checked by using the enhanced diagnostic function of the TECH-1 as described in "TECH-1 Diagnostics". If the DTC only fails once and DTC 56 also fails, refer to DTC 56. If intermittent and enhanced diagnostics show this DTC fails during ABS operation, refer to DTC56. Depending on the frequency of the malfunction, a physical inspection of the suspected mechanical parts may be necessary.