DTC 87: Current Flow into Wheel Speed Sensor Input Amplifier

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0), then turn it to ON (II).
Check for DTCs with the HDS.
Is DTC 11, 13, 15, 17 indicated?

YES -Do the DTC 11, 13, 15, and/or 17 troubleshooting (see DTC 11, 13, 15, 17: WHEEL SPEED SENSOR (OPEN/SHORT TO BODY GROUND/SHORT TO POWER) ). ■

NO -Go to step 5.
Turn the ignition switch to LOCK (0).
Disconnect the VSA modulator-control unit 46P connector (see step 3 VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
Start the engine.

Measure the voltage between body ground and all the wheel speed sensor +B and GND terminals of the VSA modulator-control unit 46P connector individually (see table).

CONNECTOR TERMINAL REFERENCE CHART

DTC	Appropriate Terminal
DTC	+B	GND
Right-front	FR+B: No. 29	FR-GND: No. 28
Left-front	FL+B: No. 12	FL-GND: No. 34
Right-rear	RR +B: No. 30	RR-GND: No. 8
Left-rear	RL+B: No. 11	RL-GND: No. 10

Fig 1: Measuring Voltage Between Body Ground And VSA Modulator-Control Unit 46P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there any voltage?

YES -Repair short to power in the wires between the VSA modulator-control unit and the wheel speed sensor. After repair, Go to step 9. ■

NO -Check for loose or poor connections in the VSA modulator-control unit 46P connector and wheel speed sensor 2P connector. If connections are good, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ). ■

Turn the ignition switch to LOCK (0).
Reconnect all connectors.
Turn the ignition switch to ON (II).
Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Check for DTCs with the HDS.
Does the VSA and ABS indicators come on, and is DTC 22 indicated?

YES -Check for loose or poor connections in the VSA modulator-control unit 46P connector. If connections are good, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ). ■

NO -Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting (see INTERMITTENT FAILURES ).