Acura CSX. Manual — part 346
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01
02
SNR9A00K722000R7104FAAT00
−
−
−
−
−
−
−
−
DTC 71-04:
YES
NO
YES
NO
YES
NO
YES
NO
17-58
EPS Components
EPS CONTROL UNIT CONNECTOR D (28P)
R1 (BLU)
R2 (PNK)
EPS CONTROL UNIT CONNECTOR D (28P)
R1 (BLU)
R2 (PNK)
EPS Motor Angle Sensor (Check
Signals) (Regular Diagnosis)
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Start the engine.
5. Turn the steering wheel to the right or left, and wait
10 seconds or more.
Go to step 6.
Check for loose terminals or poor connections.
If the connections are good, the system is OK at
this time.
6. Check for DTCs with the HDS.
Go to step 7.
Troubleshoot the indicated DTC. If there are
no DTCs, the system is OK at this time.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the EPS control unit connector D (28P).
9. Measure the resistance between the EPS control
unit connector D (28P) terminal No. 13 and No. 27.
Go to step 10.
Go to step 13.
10. Check for continuity between body ground and the
EPS control unit connector D (28P) terminal No. 13
and the terminal No. 27 individually.
Go to step 11.
Check for loose terminals in the EPS control
unit connectors, and repair if necessary. If no poor
connections are found, replace the EPS control unit
(see page 17-84).
Wire side of female terminals
Wire side of female terminals
Does the EPS indicator come on?
Is DT C 7 1-04 indicated?
Is the r esistance between 13
25
?
Is ther e continuity?
08/08/21 14:54:38 61SNR030_170_0059
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01
02
−
−
−
−
YES
NO
YES
NO
17-59
EPS MOTOR ANGLE SENSOR 6P CONNECTOR
R2 (GRN)
R1 (BRN)
EPS MOTOR ANGLE SENSOR 6P CONNECTOR
R2 (GRN)
R1 (BRN)
11. Disconnect the EPS motor angle sensor 6P
connector.
12. On the sensor side check for continuity between
body ground and EPS motor angle sensor 6P
connector terminal No. 2 and the terminal No. 5
individually.
Faulty EPS motor angle sensor (internal
failure), or short to body ground in the wire (sensor
side), replace the EPS motor (see page 17-63).
Repair short to body ground in the wire
between the EPS motor angle sensor 6P connector
and the EPS control unit.
13. Disconnect the EPS motor angle sensor 6P
connector.
14. On the sensor side measure the resistance between
the EPS motor angle sensor 6P connector terminals
No. 2 and No. 5.
Open, or short to body ground in the wire
between the EPS motor angle sensor 6P connector
and EPS control unit.
Faulty EPS motor angle sensor (internal
failure), or short to body ground in the wire (sensor
side), replace the EPS motor (see page 17-63).
Terminal side of male terminals
Terminal side of male terminals
Is ther e continuity?
Is the r esistance between 13
25?
08/08/21 14:54:39 61SNR030_170_0060
SNR9A00F18100000000FAAT03
*01
SNR9A00F18100000000FAAT04
−
−
−
−
−
−
EPS indicator does not come on
EPS indicator does not go off, and no DTCs
are stored
YES
NO
YES
NO
YES
NO
17-60
17-60
EPS Components
Symptom Troubleshooting
EPS CONTROL UNIT CONNECTOR D (28P)
IG1 (YEL)* (GRY)*
*1: ’06 model
*2: ’07-09 models
1
2
1. Turn the ignition switch to ON (II), and watch the
EPS indicator.
The system is OK at this time.
Troubleshoot the gauge control module (tach)
(see page 22-241).
NOTE: Check for gauge DTCs with the HDS (see page
22-3). If gauge DTCs are stored, troubleshoot those
DTCs first.
1. Turn the ignition switch to LOCK (0).
2. Check the No. 4 (7.5 A) fuse in the under-dash fuse/
relay box.
Reinstall the checked fuse, then go to step 5.
Go to step 3.
3. Disconnect EPS control unit connector D (28P).
4. Check for continuity between EPS control unit
connector D (28P) terminal No. 16 and body ground.
Repair short to body ground in the wire
between the EPS control unit and the No. 4 (7.5 A)
fuse in the under-dash fuse/relay box.
Install a new No. 4 (7.5 A) fuse in the under-
dash fuse/relay box, then go to step 5.
Wire side of female terminals
Does the EPS indicator come on?
Is the f use OK ?
Is ther e continuity?
08/08/21 14:55:07 61SNR030_170_0061
*02
02
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
17-61
EPS CONTROL UNIT CONNECTOR D (28P)
IG1 (YEL)* (GRY)*
*1: ’06 model
*2: ’07-09 models
EPS CONTROL UNIT CONNECTOR A (2P)
PG (BLK)
1
2
5. Reconnect EPS control unit connector D (28P).
6. Turn the ignition switch to ON (II), and watch the
EPS indicator.
Troubleshooting is complete.
Replace the EPS control unit (see page 17-84).
7. Disconnect EPS control unit connector D (28P).
8. Turn the ignition switch to ON (II).
9. Measure the voltage between EPS control unit
connector D (28P) terminal No. 16 and body ground.
Go to step 10.
Repair open in the wire between the EPS
control unit and under-dash fuse/relay box.
10. Turn the ignition switch to LOCK (0).
11. Disconnect EPS control unit connector A (2P).
12. Check for continuity between EPS control unit
connector A (2P) terminal No. 1 and body ground.
Go to step 13.
Repair open in the wire between the EPS
control unit and body ground (G402).
Wire side of female terminals
Wire side of female terminals
Does the EPS indicator come on, then go of f ?
Is ther e batter y voltage?
Is ther e continuity?
08/08/21 14:55:07 61SNR030_170_0062
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