DTC Troubleshooting: 62-21

DTC 62-21:  Modulator-control Unit IG High Voltage

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Turn the ignition switch OFF, then start the engine.

4.Check for DTCs with the HDS.

Is DTC 62-21 indicated?


YES - Go to 5.


NO - Intermittent failure, the system is OK at this time. Check for loose terminals at the ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting.n


5.Using a voltmeter, measure the voltage between the battery terminals. Compare the voltage measured at the battery with the voltage shown in the ABS DATA LIST with the HDS.

Is the voltage difference 3 V or more?


YES - Replace the ABS modulator-control unit: Except K20Z2 engine model, K20Z2 engine model.n


NO - Check the battery, and do the alternator regulator circuit troubleshooting: R18A1 engine model, K20Z2 engine model. Also check for loose terminals in the ABS modulator-control unit 25P connector. If necessary, substitute a known-good ABS modulator-control unit, and retest: Except K20Z2 engine model, K20Z2 engine model.n