ABS (Without VSA)

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

DTC 61-01: ABS Modulator-control Unit Initial IG Low Voltage

DTC 61-21: ABS Modulator-control Unit Power Source Low Voltage 1

DTC 61-22: ABS Modulator-control Unit Power Source Low Voltage 2

DTC 61-23: ABS 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 ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting. How To Troubleshoot The ABS (Without VSA)


5. Check and note BATTERY voltage in the ABS 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 than 3 V?
YES - 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. How To Troubleshoot The ABS (Without VSA) If the code resets after clearing, replace the ABS modulator-control unit: Except Si model, Service and Repair Si model. Service and Repair

NO - Check for loose terminals in the ABS modulator-control unit 25P connector. If necessary, substitute a known-good ABS modulator-control unit: Except Si model, Service and Repair Si model, Service and Repair and retest.