VSA System

VSA DTC Troubleshooting: 61-01, 61-21, 61-22, 61-23

DTC 61-01:

VSA Modulator-Control Unit Initial IG Low Voltage

DTC 61-21:

VSA Modulator-Control Unit Power Source Low Voltage 1

DTC 61-22:

VSA Modulator-Control Unit Power Source Low Voltage 2

DTC 61-23:

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.

Is DTC 61-01, 61-21, 61-22, or 61-23 indicated?

YES -

Go to step 5.

NO -

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.�

5. Check and note BATTERY voltage in the VSA DATA LIST with the HDS.

6. Using a voltmeter, measure and note the voltage across the battery terminals.

NOTE: If the voltage is below 9.5 V, check the battery Testing and Inspection, and troubleshoot the alternator regulator circuit: Except Si model Alternator and Regulator Circuit Troubleshooting, Si model Alternator and Regulator Circuit Troubleshooting.

7. Compare the voltage noted in step 5 to the voltage in step 6.

Is the difference between the two voltage readings less then 3 V?

YES -

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. If the code resets after clearing, replace the VSA modulator-control unit Service and Repair.�

NO -

Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit Service and Repair, and retest.�