## DTC Troubleshooting: P1887 (53-1)

DTC P1887: | Problem in VABS Circuit

NOTE: Record all freeze data before you troubleshoot.

1. | Check whether the ABS DTC is indicated. Is the ABS DTC indicated? YES - Perform the ABS troubleshooting by 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 terminal A23 and body ground, and between terminal A24 and body ground. Are there continuity? YES - Go to 4. NO - Repair open in the wire 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 subsutitute 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 and remaining lifted 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 or short in the VABS wire between PCM connector terminal A15 and ABS control unit.n