steering ACURA CSX 2006 Service Manual PDF

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DTC 32-01:
DTC 32-02:
DTC 35-01:
DTC 35-02:
DTC 35-04:
DTC 35-06:
DTC 35-07:
DTC 36-02:
DTC 37-01: DTC 32-07:
YES
NO
YES
NO YES
NO
YES
NO
17-3917-39
EPS Control Unit Internal Circuit
(Current Sensor) (Initial Diagnosis)
EPS Control Unit Internal Circuit
(Current Sensor) (Regular Diagnosis)
EPS Control Unit Internal Circuit
(CPU) (Initial Diagnosis/Regular Diagnosis)
EPS Control Unit Internal Circuit
(EEPROM) (Initial Diagnosis)
EPS Control Unit Internal Circuit
(CPU Communication) (Regular Diagnosis)
EPS Control Unit Internal Circuit
(ITN Communication) (Regular Diagnosis)
EPS Control Unit Internal Circuit
(INHL/INHR Ports) (Initial Diagnosis/Regular
Diagnosis)
EPS Control Unit Internal Circuit
(INH Output Circuit) (Initial Diagnosis)
EPS Control Unit Internal Circuit
(Step-up Circuit) (Initial Diagnosis) EPS Control Unit Internal Circuit
(Current Sensor) (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.
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.
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). Troubleshoot the indicated DTC. If there are
no DTCs, the system is OK at this time. 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.
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).
Troubleshoot the indicated DTC. If there are
no DTCs, the system is OK at this time.
Does t he E PS i nd i cat or come on?
Is DT C 32-01, 32-02, 35-01, 35-02, 35-04, 35-06,35-07 , 36-02, or 37 -01 ind icated ? Does t he E PS i nd i cat or come on?
Is DTC 32-07 indicated?
08/08/21 14:54:04 61SNR030_170_0040
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DTC 32-08:
DTC 32-09:
YES
NO
YES
NO YES
NO
17-40EPS Components
DTC Troubleshooting (cont’d)
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)
Current Sensor (Regular
Diagnosis)
Current Sensor (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.
5. Turn the steering wheel to the right or left, and wait10 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 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).
Check for loose terminals in the EPS control
unit connectors and EPS motor connectors, and
repair if necessary. If no poor connections are
found, replace the EPS control unit (see page 17-84).
Go to step 10.
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 32-08 or 32-09 i nd i cat ed ? Is there continuity?
08/08/21 14:54:32 61SNR030_170_0041
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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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YES
NO
YES
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
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YES
NO
YES
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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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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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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YES
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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DTC 71-04:
YES
NO
YES
NO YES
NO
YES
NO
17-58EPS Components
DTC Troubleshooting (cont’d)
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 terminalsDoes t he E PS i nd i cat or come on?
Is DTC 71-04 indicated? Is t he r esi st ance bet w een 13 25 ?
Is there continuity?
08/08/21 14:54:38 61SNR030_170_0059
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Removal
17-63
EPS Motor Removal and Installation
A B
6x1.0mm A
B
8x1.25mm
NOTE:
 Do not allow dust, dirt, or other foreign materials to enter the gearbox.
 Make sure not to get any silicone grease on the terminal part of the connectors and switches,
especially if you have silicone grease on your hands
or gloves.
1. Remove the steering gearbox (see page 17-65).
2. Disconnect the torque sensor 3P connector (A) from the steering gearbox, then remove the wire
harness clamp bolts and the ground terminal (B). 3. Remove the EPS motor (A) from the steering
gearbox, then remove the O-ring (B) and discard it.
(cont’d)
Replace.
08/08/21 14:55:08 61SNR030_170_0064
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