Electric Powertrain Symptom Troubleshooting - 12 volt charging system indicator stays on, no DTCs set
- PGM-FI system DTC check
-1. Check for Pending or Confirmed DTCs in the PGM-FI system with the HDS.
DTC Description Confirmed DTC Pending DTC Are any Pending or Confirmed DTCs indicated?
YES
The failure is duplicated. Go to the troubleshooting for PGM-FI system DTC(s) .
NO
Go to step 2.
- Problem verification 1
-1. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit History of DC-DC Converter Stop 2 1 Does the current condition(s) match the threshold?
YES
The system is OK at this time. The 12 volt charging system indicator will turn off when the state-of charge (SOC) increases.
NO
Go to step 3.
- Problem verification 2
-1. Check the parameter(s) below with the HDS.
Signal Current conditions Values Unit DC-DC Converter Temperature Is 217 deg. F (103 deg. C) or more indicated?
YES
The system is OK at this time. The 12 volt charging system indicator will turn off when the DC-DC converter temperature decreases.
NO
Go to step 4.
- Problem verification 3
-1. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit HV Battery Total Voltage 115. 8 - 315 V Does the current condition(s) match the threshold?
YES
Go to step 5.
NO
The system is OK at this time. The 12 volt charging system indicator will turn on when the DC-DC converter temperature increases or over the operating voltage range temporary.
- Gauge control module check
-1. Turn the vehicle to the ON mode.
-2. Do the gauge control module self-diagnostic function .
Does the 12 volt charging system indicator flash?
YES
NO
Substitute a known-good gauge control module , then recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module .