Content .. 410 411 412 413 ..

Acura CSX. Manual - part 412

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８１ＸＸＦＡＡＴ００

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８１１１ＦＡＡＴ００

−

DTC 81-xx :

DTC 81-11:

DTC 81-52:

DTC 81-54:

DTC 81-56:

DTC 81-58:

YES

19-153

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

: Any two-character subcode (Except these

combinations: DTC 81-11, 81-3D, 81-3E, 81-51,
81-52, 81-53, 81-54, 81-55, 81-56, 81-57, 81-58, and
81-59)

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), then turn it to

ON (II) again.

4. Check for DTCs with the HDS.

If DTC 81-11, 81-3D, 81-3E, 81-51, 81-52,

81-53, 81-54, 81-55, 81-56, 81-57, 81-58, or 81-59 is
indicated at the same time, do the appropriate
troubleshooting first.
If DTC 81-11, 81-3D, 81-3E, 81-51, 81-52, 81-53,
81-54, 81-55, 81-56, 81-57, 81-58, or 81-59 is not
indicated. Replace the VSA modulator-control unit
(see page 19-171).

Intermittent failure, the system is OK at this

time.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive the vehicle.

NOTE: Drive the vehicle on the road, not on a lift.

4. Check for DTCs with the HDS.

Replace the VSA modulator-control unit

(see page 19-171).

Intermittent failure, the system is OK at this

time.

Is DT C 81-xx indicated?

Is DT C 81-11, 81-52, 81-54, 81-56, or 81-58
indicated?

08/08/21 15:06:41 61SNR030_190_0153

０１

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８１５１ＦＡＡＴ００

＋

−

DTC 81-51:

DTC 81-53:

DTC 81-55:

DTC 81-57:

YES

DTC

VSA Modulator-control Unit 37P

Connector Terminals

YES

19-154

VSA System Components

VSA MODULATOR-CONTROL UNIT 37P CONNECTOR

B (GRN)

B (LT GRN)

B (YEL)

B (WHT)

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive the vehicle.

NOTE: Drive the vehicle on the road, not on a lift.

4. Check for DTCs with the HDS.

Go to step 5.

Intermittent failure, the system is OK at this

time.

5. Turn the ignition switch to LOCK (0).

6. Disconnect the VSA modulator-control unit 37P

connector (see step 2 on page 19-171).

7. Turn the ignition switch to ON (II).

8. Measure the voltage between body ground and the

appropriate VSA modulator-control unit 37P
connector terminals (see table).

81-51

No. 19

81-53

No. 22

81-55

No. 9

81-57

No. 20

Repair short to power in the wire between

the appropriate wheel speed sensor and the VSA
modulator-control unit.

Replace the VSA modulator-control unit

(see page 19-171).

Wire side of female terminals

Is DT C 81-51, 81-53, 81-55, or 81-57 indicated?

Is ther e 0.1 V or mor e?

08/08/21 15:06:41 61SNR030_190_0154

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８１３ＤＦＡＡＴ００

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８３１３ＦＡＡＴ００

−

DTC 81-3D:

DTC 81-3E:

DTC 81-59:

DTC 83-13:

DTC 83-14:

YES

19-155

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

Central Processing Unit (CPU)

Internal Circuit Malfunction

ECM/PCM Communication Error

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Start the engine.

4. Turn the steering wheel from lock to lock several

times.

5. Check for DTCs with the HDS.

Replace the VSA modulator-control unit

(see page 19-171).

Intermittent failure, the system is OK at this

time.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive the vehicle.

NOTE: Drive the vehicle on the road, not on a lift.

4. Check for DTCs with the HDS.

Go to step 5.

Intermittent failure, the system is OK at this

time. Check for loose terminals between the ECM/
PCM connector A (44P) and the VSA modulator-
control unit 37P connector. Refer to intermittent
failures troubleshooting (see page 19-98).

5. Turn the ignition switch to LOCK (0).

6. Update the ECM/PCM if it does not have the latest

software (see page 11-227), or substitute a known-
good ECM/PCM (see page 11-7).

7. Turn the ignition switch to ON (II).

8. Clear the DTC with the HDS.

9. Test-drive the vehicle.

NOTE: Drive the vehicle on the road, not on a lift.

10. Check for DTCs with the HDS.

Replace the VSA modulator-control unit

(see page 19-171).

If the ECM/PCM was updated, troubleshooting

is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228).

Is DT C 81-3D, 81-3E, or 81-59 indicated?

Is DT C 83-13 or 83-14 indicated?

08/08/21 15:06:41 61SNR030_190_0155

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８４２１ＦＡＡＴ００

ＳＮＲ９ＡＣ７Ｋ８０１０００Ｒ８６０１ＦＡＡＴ００

−

DTC 84-21:

DTC 86-01:

YES

19-156

VSA System Components

VSA Sensor Neutral Position not

Writing

F-CAN Bus-off Malfunction

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Do the VSA sensor neutral position memorization

(see page 19-169).

4. Turn the ignition switch to LOCK (0), then turn it to

ON (II) again.

5. Check for DTCs with the HDS.

Check for loose terminals in the VSA

modulator-control unit 37P connector. If necessary,
substitute a known-good VSA modulator-control
unit (see page 19-171), and retest.

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), then turn it to

ON (II) again.

4. Check for DTCs with the HDS.

Go to step 5.

Intermittent failure, the system is OK at this

time. Check for loose terminals between ECM/PCM
connector A (44P) and the VSA modulator-control
unit 37P connector. Refer to intermittent failures
troubleshooting (see page 19-98).

5. Turn the ignition switch to LOCK (0).

6. Short the SCS line with the HDS.

7. Disconnect ECM/PCM connector A (44P).

8. Disconnect the VSA modulator-control unit 37P

connector (see step 2 on page 19-171).

Is DT C 84-21 indicated?

Is DT C 86-01 indicated?

08/08/21 15:06:41 61SNR030_190_0156

Content .. 410 411 412 413 ..