Honda Civic Service Manual page 519

EPS Components
DTC Troubleshooting
DTC 12: Torque Sensor T/SIG
1 . C l e a r t h e D T C .
2 . S t a n t h e e n g i n e .
3. Wait at least 10 seconds.
Does the EPS indicatot come on?
YES Go to step 4.
NO Check for loose wires or poor connections. lf
the connections are good, the system is OK at this
t i m e . l
4 . Stop the engine, and verify the DTC.
ls DTC12 indicated?
YES Go to slep 5.
NO-Perform the appropriate troubleshooting for
the code indicated. t
Make sure the ignition switch is OFF, then
disconnect EPS control unit connector C (20P) and
the torque sensor 6P connector.
Check for continuity between EPS control unit
c o n n e c t o r C ( 2 0 P ) t e r m i n a l N o . 1 5 a n d b o d y g r o u n d .
EPS CONTROL UNIT CONNECTOR C {2OP)
Wire side of female terminals
ls there continuity?
YES- Repair short to body ground in the wire
between the torque sensor and EPS control unit.l
NO Go to step 7.
5 .
17-28
1 .
8 .
Turn the ignition switch ON (ll).
Measure the voltage between EPS control unit
c o n n e c t o r C ( 2 0 P ) t e r m i n a l N o . 1 5 a n d b o d y g r o u n d .
EPS CONTROL UNIT CONNECTOR C (2OP)
2 3 5
6
1 8
0
T/SIG
{YEL/BLK)
Wire side ot lemale terminals
I s there battery v oltage?
YES-Repair short to power in the + circuit wire
between the torque sensor and EPS control unit.l
NO Go to step 9.
Turn the ignition switch OFF.
Check for continuity between EPS control unit
connector C (20P) terminal No. 15 and the torque
sensor 6P connector terminal No. 4.
EPS CONTROL UNIT CONNECTOR C (2OPI
\
9 .
1 0 .
T/SIG
(YEL/BLK)
W i r e s i d e o f f e m a l e t e r m i n a l s
TOROUE SENSOR
6P CONNECTOR
T/SIG
(YEL/BLK)
ls there continuity?
YES Go to step 1'1,
NO Repair open in the wire between the torque
sensor and the EPS control unit.I
Wire side ot female terminals