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VSA DTC Troubleshooting: 62-21

DTC 62-21:
 VSA Modulator-control Unit IG High Voltage
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch to LOCK (0), then start the engine.
  1. Check for DTCs with the HDS.
Is DTC 62-21 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Check and note BATTERY voltage in the VSA DATA LIST with the HDS.
  1. Using a voltmeter, measure and note the voltage between the battery terminals.
    NOTE: If the voltage is beyond 15.1 V, troubleshoot the alternator regulator circuit.
  1. Compare the voltage noted in Step 5 to the voltage in Step 6 .
Is the difference between the two voltage readings less than 3 V?
YES -
Intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 36P connector. Refer to intermittent failures troubleshooting. If the code resets after clearing, go to Step 8 .
NO -
Go to Step 8 .
  1. Turn the ignition switch to LOCK (0), then start the engine.
  1. Check for DTCs with the HDS.
Is DTC 62-21 indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, then retest. If the VSA modulator-control unit was substituted, go to Step 1 .
NO -
If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.■