DTC Summary

The hybrid vehicle control ECU monitors the high-voltage wiring between the HV battery and inverter with converter assembly and detects an open circuit malfunction.

HINT: 

• This DTC is differentiated from P3004-49 based on detection timing (after ignition switch is turned to ON (READY)). If P3004-49 is also output at the same time, first perform troubleshooting for P3004-49.
• If there is a SMRG stuck open malfunction, only P1C84-49 is output.

The cause of this malfunction may be one of the following:

Inverter voltage sensor (VH or VL) internal circuit malfunction 

• Voltage sensor (VH or VL) malfunction
• Motor generator control ECU (MG ECU) malfunction
• Communication (wire harness) malfunction

High voltage system malfunction 

• HV battery malfunction
• HV battery junction block assembly malfunction
• Inverter with converter assembly malfunction
• High-voltage wire harness malfunction
• High-voltage connector or connection malfunction

Low-voltage circuit (12 V) malfunction 

• Hybrid vehicle control ECU malfunction
• HV battery junction block assembly malfunction
• Low voltage wire harness malfunction
• Low voltage connector malfunction