DTC U0599: Invalid Data Received From DC-DC Converter Control Module A (35) (2017)
General Description
The battery condition monitor module communicates with the DC-DC converter. The battery condition monitor module does not receive signals from the DC-DC converter for a set time, or when the information sent from the DC-DC converter is abnormal and this condition continues for a specified time, the battery condition monitor module detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | Two drive cycles, MIL off, POWER SYSTEM indicator on |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Elapsed time since the 12 volt battery voltage reaches to a specified value after the vehicle condition is turned to the ON mode | 3 seconds | - |
| 12 volt battery voltage | 10.2 V | - |
Malfunction Threshold
One of these conditions is met:
- The battery condition monitor module does not receive any signals from the DC-DC converter for at least 2.0 seconds.
- The information sent from the DC-DC converter is abnormal at least 2.0 seconds.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- DC-DC converter F-CAN A_H line open
- DC-DC converter F-CAN A_L line open
- DC-DC converter F-CAN A_H line short to ground
- DC-DC converter F-CAN A_L line short to ground
- DC-DC converter does not active
- DC-DC converter failure
- Battery condition monitor module failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the battery condition monitor module memory. If the malfunction returns in the next (second) drive cycle, the POWER SYSTEM indicator comes on and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The POWER SYSTEM indicator is cleared if the malfunction does not return in three consecutive trips in which diagnostic runs. The POWER SYSTEM indicator, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with scan tool Clear command or by disconnecting the 12 volt battery.