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Acura CSX. Manual - part 345

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17-54

EPS Components

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 EPS

control 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

Is ther e continuity?

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DTC 71-01:

DTC 71-02:

DTC 71-03:

DTC 71-05:

DTC 71-06:

17-55

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).

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 ther e continuity?

Does the EPS indicator come on?

Is DT C 7 1-01, 7 1-02, 7 1-03, 7 1-05 or 7 1-06
indicated?

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17-56

EPS Components

No. 27 (R2)

No. 13 (R1)
No. 12 (S1)
No. 14 (S2)

No. 26 (S3)
No. 28 (S4)

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

Is the r esistance between R1-R2 13

, S1-S3

, and S2-S4 26

Is ther e continuity?

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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

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, terminal No. 4, terminal No. 5, and terminal
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

Is ther e continuity?

Is the r esistance between R1-R2 13

, S1-S3

, and S2-S4 26

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Content .. 343 344 345 346 ..