Pinpoint Test 3: the DC/DC Converter Does Not Operate Correctly

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PINPOINT TEST 3: THE DC/DC CONVERTER DOES NOT OPERATE CORRECTLY - HYBRID

Normal Operation

The DC/DC converter is a liquid-cooled component that converts high voltage (216-397 volts) DC power to low voltage (12 volts) DC power while maintaining electrical isolation between the 2 DC power systems. The converter steps down the high voltage to 12 volts, providing power to the vehicle low voltage battery system. The powertrain control module (PCM) controls the operation of the DC/DC converter through an enable input from the PCM to the DC/DC converter.

Possible Causes
- PCM
- 12-volt battery
- Battery cables
- DC/DC converter

Diagnostic Procedure

Step 1-Step 5:

Step 6-Step 7: