Electrical Power Steering (Eps) Signal Circuit Troubleshooting - Honda S2000 Service Manual

ldle Gontrol System
1 .
2 .
Electrical Power Steering (EPS) Signal Circuit Troubleshooting
T u r n t h e i g n i t i o n s w i t c h O N ( l l ) .
Measure voltage between ECM connector
t e r m i n a l s A 2 6 a n d 8 2 0 .
ECM CONNECTORS
wire side of female terminals
ls there battery voltage?
YES Go to step 6.
N O - G o t o s t e p 3 .
3. Start the engine.
4. Turn the steering wheel to the full lock position.
5. Measure voltage between ECM connector
t e r m i n a l s 4 2 6 a n d 8 2 0 .
ls there battery voltage brietly?
Y E S T h e E P S s i g n a l i s O K . l
N O G o t o s t e p 1 0 .
6. Turn the ignition switch OFF.
7. Disconnectthe EPS control unit 14P connector.
8 . T u r n t h e i g n i t i o n s w i t c h O N { l l ) .
A (32P1
1 1 - 9 8
9, Measure voltage between EPS control unitterminal
N o . 1 3 a n d b o d y g r o u n d .
EPS CONTROL UNIT 14P CONNECTOR
EPSLD {BLU/BLK}
Wire side of female terminals
ls thete battery voltage?
YES Substitute a known-good EPS control unit
a n d r e c h e c k . l
NO Repair open in the wire between the ECM
(426) and the EPS control unit.l
T u r n t h e i g n i t i o n s w i t c h O F F .
Disconnect the EPS control unit 14P connector.
T u r n t h e i g n i t i o n s w i t c h O N { l l ) .
1 0 .
' 1 1 .