DTC P1D8A
DTC P1D8A: Generator Motor Inverter Gate Line Open
General Description
The power control unit (PCU) cannot be able to output malfunction information (SC) signal which outputs by an occurrence of IGBT overcurrent if the SC detection circuit malfunctions. Three motor phase current typically generate sine waves centered around 0 A. But if it malfunctions, a part of the waveform chips or one phase fixes to 0 A resulting an occurrence of difference between the commanded current and the actual current. If either of the following conditions occurs, the motor control module in the PCU detects a malfunction and stores a DTC.
Symptom 1
If the 3-phase current sensor output value is out of a specified value for a specified time, the motor control module in the PCU detects a malfunction and stores a DTC.
Symptom 2
If the deviation between the current sensor output (A) and command value is out of a specified value in specified times, the motor control module in the PCU detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 400 milliseconds or more |
| DTC Type | One drive cycle, MIL on, POWER SYSTEM indicator on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Generator motor speed [Motor speed (GEN)]* | 400 rpm | - |
| Generator motor speed [Motor speed (GEN)]** | - | 3, 000 rpm |
| 12 volt battery voltage | 8 V | - |
[ ]: HDS Parameter
*: Symptom 1
**: Symptom 2
| Condition | Minimum | Maximum |
|---|---|---|
| Current width | 50 A | - |
[ ]: HDS Parameter
*: Symptom 1
**: Symptom 2
Malfunction Threshold
One of these symptoms occurs:
Symptom 1
- If a circumstance where the current sensor output value (A) is less than 21.6 A or more than -21.6 A at 95 % or more of 100 milliseconds continues for at least 400 milliseconds.
Symptom 2
- The following conditions occurs 4 times within 1 second:
The condition when the phase current deviation is more than commanded current x (multiplied by) 0.22 + (plus) 31.5 A, or less than commanded current x (multiplied by) -0.22 - (minus) -31.5 A accounts for 10 % or more during 100 milliseconds.
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.
- Generator motor power cable line failure
- Generator motor motor rotor position sensor line failure
- Generator motor motor rotor position sensor failure
- Generator motor failure
- PCU internal failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the motor control module memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.