Dtc 22: Vehicle Speed Signal - Honda S2000 Service Manual

EPS Components
DTG Troubleshooting (cont'dl
DTC 22: Vehicle Speed Signat
NOTE:
. lf the l\4lL indicator is ON, troubleshootthe PGM-Fl
system iirst.
. When the engine is running at 2,000 rpm or above
and the vehicle speed is 0.62 mph ( l km/h) or below
for 3 minutes, the EPS indicator comes on.
1. Test-drive the vehicle.
ls the vehicle speedometer working correctly?
YES Go to step 2.
NO Perform the speedometer system
troubleshooting (see page 22-53). a
Turn the ignition switch OFF.
Block the front wheels and release the parking
oraKe.
Raise the vehicle, and make sure it is securely
supported.
Disconnect EPS control unit connector B (14P).
17-36
6. Block the right rear wheel, and slowly rotate the left
rear wheel and measure the voltage between EPS
control unit connector B {14P) terminal No. 2 and
body ground.
EPS CONTROL UNIT
CONNECTOR B I14P}
{WHT/BLK)
Terminal side oJ female terminals
Does the voltage pulse 0 V and 5 V ?
YES Check for loose EPS control unit connectors.
lf necessary. substitute a known-good EPS control
unit and recheck.I
NO Repair open or short to body ground in the
wire between the EPS control unit and body ground,
or faulty the speedometer.I