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Acura CSX. Manual - part 409

０１

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−

DTC 53-01:

DTC 53-12:

YES

19-141

MR-GND (BLK)

VSA MODULATOR-CONTROL UNIT 37P CONNECTOR

Motor Relay Stuck ON 1

Motor Relay Stuck ON 2

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 at 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. Disconnect the VSA modulator-control unit 37P

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

7. Check for continuity between VSA modulator-

control unit 37P connector terminal No. 37 and
body ground.

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.

Repair open in the wire between the VSA

modulator-control unit and body ground (G202).

Wire side of female terminals

Is DT C 53-01 or 53-12 indicated?

Is ther e continuity?

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−

DTC 54-03:

DTC 54-04:

DTC 54-21:

DTC 56-01:

DTC 56-02:

DTC 56-11:

YES

19-142

VSA System Components

Fail-safe Relay 1 Stuck ON

Fail-safe Relay 1 Stuck OFF

(Initial)

Fail-safe Relay 1 Stuck OFF

(Main)

Initial VIG FET Stuck OFF

Initial VIG FET Stuck ON

VIG FET Stuck OFF

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.

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

ON (II) again.

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 54-03, 54-04, or 54-21 indicated?

Is DT C 56-01, 56-02, or 56-11 indicated?

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−

DTC 61-01:

DTC 61-21:

DTC 61-22:

DTC 61-23:

YES

19-143

VSA Modulator-control Unit

Initial IG Low Voltage

VSA Modulator-control Unit

Power Source Low Voltage 1

VSA Modulator-control Unit

Power Source Low Voltage 2

VSA Modulator-control Unit

Power Source Low Voltage 3

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

2. Clear the DTC with the HDS.

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

engine.

4. Check for DTCs with the HDS.

Go to step 5.

Intermittent failure, the system is OK at this

time. Check for loose terminals at the VSA
modulator-control unit 37P connector. Refer to
intermittent failures troubleshooting (see page
19-98).

5. Check and note BATTERY voltage in the VSA DATA

LIST with the HDS.

6. Using a voltmeter, measure and note the voltage

between the battery terminals.

NOTE: If the battery voltage is below 9.5 V, check
the battery (see page 22-67), and troubleshoot the
alternator regulator circuit (see page 4-28).

7. Compare the data list voltage noted in step 5 to the

battery voltage in step 6.

Intermittent failure, the system is OK at this

time. Check for loose terminals at the VSA
modulator-control unit 37P connector. Refer to
intermittent failures troubleshooting (see page
19-98). If the code resets after clearing, replace the
VSA modulator-control unit (see page 19-171).

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.

Is DT C 61-01, 61-21, 61-22, or 61-23 indicated?

Is the dif f er ence between the two voltage
r eadings less than 3 V ?

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−

DTC 62-21:

DTC 64-11:

YES

19-144

VSA System Components

VSA Modulator-control Unit IG

High Voltage

Steering Angle Sensor Power

Circuit Short

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

2. Clear the DTC with the HDS.

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

engine.

4. Check for DTCs with the HDS.

Go to step 5.

Intermittent failure, the system is OK at this

time.

5. Check and note BATTERY voltage in the VSA DATA

LIST with the HDS.

6. Using a voltmeter, measure and note the voltage

between the battery terminals.

NOTE: If the voltage is above 15.1 V, troubleshoot
the alternator regulator circuit (see page 4-28).

7. Compare the data list voltage noted in step 5 to the

battery voltage in step 6.

Intermittent failure, the system is OK at this

Replace the VSA modulator-control unit

(see page 19-171), and retest.

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.

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

6. Disconnect the steering angle sensor 5P connector.

7. Disconnect the VSA modulator-control unit 37P

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

Is DT C 62-21 indicated?

Is the dif f er ence between the two voltage
r eadings less than 3 V ?

Is DT C 64-11 indicated?

08/08/21 15:05:57 61SNR030_190_0144

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