ACURA CSX 2006 Service Repair Manual


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YES
NO
YES
NO
17-48EPS Components
DTC Troubleshooting (cont’d)
EPS CONTROL UNIT CONNECTOR D (28P)
PVF (BRN) EPS CONTROL UNIT CONNECTOR D (28P)
PVF (BRN)
10. Check for continuity between EPS control unitconnector D (28P) terminal No. 9 and body ground.
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). 11. Disconnect the torque sensor 3P connector from
the steering gearbox.
12. Check for continuity between EPS control unit connector D (28P) terminal No. 9 and body ground.
Repair short to body ground in the wire
between the torque sensor and the EPS control
unit.
Faulty torque sensor (short in the sensor
internal circuit), replace the steering gearbox
(see page 17-65).
Wire side of female terminals
Wire side of female terminals
Is there continuity?Is there continuity?
08/08/21 14:54:34 61SNR030_170_0049
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DYNOMITE -2009-

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NO
17-49
TORQUE SENSOR 3P CONNECTOR
VS1 PVF TORQUE SENSOR 3P CONNECTOR
VS2
PVF
13. Disconnect the torque sensor 3P connector from the steering gearbox.
14. On the sensor side, measure the resistance between torque sensor 3P connector terminals
No. 1 and No. 2.
Repair open or short between the PNK and
BLU/RED wires in the torque sensor circuit between
the torque sensor and the EPS control unit.
Faulty torque sensor (short or open in the
internal circuit), replace the steering gearbox
(see page 17-65). 15. Disconnect the torque sensor 3P connector from
the steering gearbox.
16. On the sensor side, measure the resistance between torque sensor 3P connector terminals
No. 2 and No. 3.
Repair open or short between the WHT/GRN
and BLU/RED wires in the torque sensor circuit
between the torque sensor and the EPS control
unit.
Faulty torque sensor (short or open in the
internal circuit), replace the steering gearbox
(see page 17-65).
Terminal side of male terminals Terminal side of male terminals
Is t he r esi st ance bet w een 12 15 ?Is t he r esi st ance bet w een 12 15 ?
08/08/21 14:54:35 61SNR030_170_0050
ProCarManuals.com
DYNOMITE -2009-

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DTC 51-02:
DTC 51-03:
DTC 51-06:
DTC 51-07:
YES
NO
YES
NO YES
NO
YES
NO
17-50EPS Components
DTC Troubleshooting (cont’d)
EPS CONTROL UNIT CONNECTOR D (28P)
PVF (BRN) VS1 (GRN)
EPS CONTROL UNIT CONNECTOR D (28P)
PVF (BRN)
VS2 (LT GRN)
Torque Sensor (VT3 Differential-
amplification Function) (Regular Diagnosis)
Torque Sensor (VT1, VT2 Rapid
Change) (Regular Diagnosis)
Torque Sensor (VT1, VT2
Average) (Regular Diagnosis)
Torque Sensor (VT1, VT2 Initial
Check) (Initial 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.
Go to step 5.
Check for loose terminals or poor connections.
If the connections are good, the system is OK at
this time.
5. Check for DTCs with the HDS.
Go to step 6.
Troubleshoot the indicated DTC. If there are
no DTCs, the system is OK at this time.
6. Turn the ignition switch to LOCK (0). 7. Disconnect EPS control unit connector D (28P).
8. Measure the resistance between EPS control unit
connector D (28P) terminals No. 9 and No. 10.
Go to step 9.
Go to step 13.
9. Measure the resistance between EPS control unit connector D (28P) terminals No. 8 and No. 9.
Go to step 10.
Go to step 15.
Wire side of female terminals
Wire side of female terminals
Does t he E PS i nd i cat or come on?
I s DT C 5 1-02, 5 1-03, 5 1-06, or 5 1-07 i nd i cat ed ? Is t he r esi st ance bet w een 12 15 ?
Is t he r esi st ance bet w een 12 15 ?
08/08/21 14:54:35 61SNR030_170_0051
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DYNOMITE -2009-


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NO
17-51
EPS CONTROL UNIT CONNECTOR D (28P)
PVF (BRN) EPS CONTROL UNIT CONNECTOR D (28P)
PVF (BRN)
10. Check for continuity between EPS control unitconnector D (28P) terminal No. 9 and body ground.
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).
11. Disconnect the torque sensor 3P connector from the steering gearbox. 12. Check for continuity between EPS control unit
connector D (28P) terminal No. 9 and body ground.
Repair short to body ground in the wire
between the torque sensor and the EPS control
unit.
Faulty torque sensor (short in the sensor
internal circuit), replace the steering gearbox
(see page 17-65).
(cont’d)
Wire side of female terminals Wire side of female terminals
I s t her e cont i nui t y ?I s t her e cont i nui t y ?
08/08/21 14:54:36 61SNR030_170_0052
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DYNOMITE -2009-

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YES
NO
YES
NO
17-52EPS Components
DTC Troubleshooting (cont’d)
TORQUE SENSOR 3P CONNECTOR
VS1 PVF TORQUE SENSOR 3P CONNECTOR
VS2
PVF
13. Disconnect the torque sensor 3P connector from the steering gearbox.
14. On the sensor side, measure the resistance between torque sensor 3P connector terminals
No. 1 and No. 2.
Repair open or short between the PNK and
BLU/RED wires in the torque sensor circuit between
the torque sensor and the EPS control unit.
Faulty torque sensor (short or open in the
internal circuit), replace the steering gearbox
(see page 17-65). 15. Disconnect the torque sensor 3P connector from
the steering gearbox.
16. On the sensor side, measure the resistance between torque sensor 3P connector terminals
No. 2 and No. 3.
Repair open or short between the BLU/RED
and WHT/GRN wires in the torque sensor circuit
between the torque sensor and the EPS control
unit.
Faulty torque sensor (short or open in the
internal circuit), replace the steering gearbox
(see page 17-65).
Terminal side of male terminals Terminal side of male terminals
Is t he r esi st ance bet w een 12 15 ?Is t he r esi st ance bet w een 12 15 ?
08/08/21 14:54:36 61SNR030_170_0053
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DYNOMITE -2009-

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DTC 61-04:
YES
NO
YES
NO YES
NO
17-53
EPS CONTROL UNIT
CONNECTOR B
EPS CONTROL UNIT
CONNECTOR C
No. 1
No. 2
No. 1
No. 2
No. 1
No. 1
EPS CONTROL UNIT CONNECTOR B (2P)
H-V (BLU)
H-U (RED) H-W (GRN)
EPS CONTROL UNIT CONNECTOR C (2P)
Open/Short in EPS Motor Harness
(Steering 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 B (2P) and connector C (2P). 9. Check for continuity between the following
terminals of the EPS control unit connector B (2P)
and connector C (2P).
Go to step 10.
Go to step 13.
(cont’d)
Wire side of female terminals
Wire side of female terminals
Does t he E PS i nd i cat or come on? Is DT C 61-04 indicated? Is there continuity?
08/08/21 14:54:36 61SNR030_170_0054
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DYNOMITE -2009-




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17-54EPS Components
DTC Troubleshooting (cont’d)
EPS CONTROL UNIT CONNECTOR B (2P)
H-W (GRN)
EPS CONTROL UNIT CONNECTOR C (2P) H-U (RED) H-V (BLU) EPS CONTROL UNIT CONNECTOR B (2P)
H-W (GRN)
EPS CONTROL UNIT CONNECTOR C (2P) H-U (RED) H-V (BLU)
10. Check for continuity between body ground and EPScontrol unit connector B (2P) terminal No. 1,
connector C (2P) terminal No. 1, and connector C
(2P) terminal No. 2 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).
11. Disconnect the EPS motor 1P connector and the EPS motor 2P connector. 12. Check for continuity between body ground and EPS
control unit connector B (2P) terminal No. 1,
connector C (2P) terminal No. 1, and connector C
(2P) terminal No. 2 individually.
Repair short to body ground in the wire
between the EPS control unit and the EPS motor.
Short to the body ground in the EPS motor
wire, or the EPS motor internal circuit, replace the
EPS motor (see page 17-65).
Wire side of female terminals
Wire side of female terminals Wire side of female terminals
Wire side of female terminals
I s t her e cont i nui t y ? I s t her e cont i nui t y ?
08/08/21 14:54:37 61SNR030_170_0055
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DYNOMITE -2009-

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NO
YES
NO
YES
NO
DTC 71-01:
DTC 71-02:
DTC 71-03:
DTC 71-05:
DTC 71-06:
17-5517-55
No. 1
No. 2
No. 1
No. 2
H-W (RED)
H-U (BLK)
H-V (WHT)
EPS MOTOR
1P CONNECTOR
EPS MOTOR
2P CONNECTOR
No. 1
No. 1
EPS MOTOR 2P CONNECTOR
EPS MOTOR 1P CONNECTOR
13. Disconnect the EPS motor 1P connector and the
EPS motor 2P connector.
14. On the EPS motor side, check for continuity between the following terminals of the EPS motor
1P and the EPS motor 2P connector.
Repair open in the wire between the EPS
control unit and the EPS motor.
Open in the EPS motor wire, or EPS motor
internal circuit, replace the EPS motor (see page
17-63). 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 EPS control unit connector D (28P).
(cont’d)EPS Motor Angle Sensor (SIN/
COS Signals) (Steering Diagnosis)
EPS Motor Angle Sensor (Neutral
Position Learning of SIN/COS) (Initial
Diagnosis)
EPS Motor Angle Sensor (SIN/
COS Signals) (Steering Diagnosis)
EPS Motor Angle Sensor (SIN/
COS Signals Charging Amount) (Steering
Diagnosis)
EPS Motor Angle Sensor (Neutral
Position of SIN/COS) (Initial Diagnosis)
Terminal side of male terminal
Terminal side of male terminals
Is there continuity? Does t he E PS i nd i cat or come on?
Is DT C 7 1-01, 7 1-02, 7 1-03, 7 1-05 or 7 1-06indicated?
08/08/21 14:54:37 61SNR030_170_0056
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NO YES
NO
17-56EPS Components
DTC Troubleshooting (cont’d)
No. 27 (R2)
No. 13 (R1)
No. 12 (S1)
No. 14 (S2) No. 26 (S3)
No. 28 (S4)
EPS CONTROL UNIT CONNECTOR D (28P)
EPS CONTROL UNIT CONNECTOR D (28P) S1 (PNK)
S3 (BRN) S4 (BLU)
S2 (BRN)
R1 (BLU)
R2 (PNK) EPS CONTROL UNIT CONNECTOR D (28P)
S3 (BRN)R2 (PNK) S4 (BLU) S2 (BRN)
R1 (BLU)
S1 (PNK)
9. Measure the resistance between the following
terminals of EPS control unit connector D (28P).
Go to step 10.
Go to step 13. 10. Check for continuity between body ground and EPS
control unit connector D (28P) terminal No. 12,
terminal No. 13, terminal No. 14, terminal No. 26,
terminal No. 27, and terminal No. 28 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).
11. Disconnect the EPS motor angle sensor 6P connector.
Wire side of female terminals
Wire side of female terminals
Is t he r esi st ance bet w een R1-R2 13 25 , S1-S326 49 , and S2-S4 26 49 ? I s t her e cont i nui t y ?
08/08/21 14:54:37 61SNR030_170_0057
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17-57
EPS MOTOR ANGLE SENSOR 6P CONNECTOR
S3
(BLU)R2
(GRN)S4 (RED) S2 (BLK)
R1 (BRN)
S1 (YEL) No. 5 (R2)
No. 2 (R1)
No. 1 (S1)
No. 3 (S2) No. 4 (S3)
No. 6 (S4)
EPS MOTOR ANGLE SENSOR 6P CONNECTOR
EPS MOTOR ANGLE SENSOR 6P CONNECTOR S1 (YEL)
S3 (BLU) R1 (BRN)
S2 (BLK)
S4 (RED)
R2 (GRN)
12. On the sensor side, check for continuity between body ground and EPS motor angle sensor 6P
connector terminal No. 1, terminal No. 2, terminal
No.3,terminalNo.4,terminalNo.5,andterminal
No. 6 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 following terminals of the EPS motor
angle sensor 6P connector.
Open, or short to body ground in the wire
between the EPS motor angle sensor 6P connector
and the 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 there continuity?Is t he r esi st ance bet w een R1-R2 13 25 , S1-S326 49 , and S2-S4 26 49 ?
08/08/21 14:54:38 61SNR030_170_0058
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