DTC Troubleshooting: P1887 (53-1)

DTC P1887:  Problem in VABS Circuit

For KB, KE, KG, and KQ Models


NOTE:

1.Check whether the ABS DTC is indicated.

Is the ABS DTC indicated?


YES - Perform the ABS troubleshooting for the indicated DTC, and recheck for DTC P1887 after troubleshooting.


NO - Go to 2.


2.Turn the ignition switch OFF.

3.Check for continuity between PCM connector terminals A23 and body ground, and between A24 and body ground.

 

Is there continuity?


YES - Go to 4.


NO - Repair open in the wire between PCM connector terminals A23 and A24, and ground (G101), or repair poor ground (G101).n

4.Lift up the vehicle, and allow the wheels to rotate freely.

5.With driving the vehicle, measure the voltage between PCM connector terminals A18 and A23 or A24.

 

Is there pulsing voltage between 0-5 V?


YES - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original  PCM.n


NO - Go to 6.

6.Disconnect ABS control unit connector.

7.With driving the vehicle while lifting the vehicle up, measure the voltage between ABS control unit connector terminal No. 15 and body ground.

 

Is there voltage?


YES - Check for loose terminal fit in the ABS control unit connector.n


NO - Repair open in the wire between PCM connector terminal A18 and ABS control unit.n