DTC P0D20-422: Charger Relay Stuck Open [08/2014 - ]: Description

WARNING: This page is about a different variant/trim than selected.

The charge relays are located in the hybrid battery junction block assembly inside the HV battery pack. The charge relays operate according to the command from the plugin charge control ECU assembly to connect or interrupt the high-voltage circuits between the electric vehicle charger assembly and HV battery.

When the power switch is on (READY), the circuits to the HV battery are interrupted to prevent electricity leakage from the high-voltage circuits, electrical shock and fire in case of a collision.

During plug-in charging, the SMRs are closed in the order of SMRB ON, SMRP ON, SMRG ON and SMRP OFF, then the charge relays (CHRB and CHRG) are closed.

When plug-in charging is canceled, the SMRs and charge relays are opened in this order.

This DTC is also stored if a short or open occurs in the high-voltage circuit (between the HV battery and electric vehicle charger assembly).

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0D20	422	VCHG sensor (electric vehicle charger assembly output voltage sensor) voltage is too low when plug-in charging is started even though the charge relays (CHRB and CHRG) are closed.	Plugin charge control ECU assembly Hybrid battery junction block assembly Wire harness or connector Electric vehicle fuse Electric vehicle charger assembly Electric vehicle charger wire

RELATED DATA LIST

DTC No.	INF Code	Data List
P0D20	422	Charger Output Voltage Charging Control Status CHRB Status CHRG Status CHRB Control Status CHRG Control Status

The following Data List items can be helpful when performing repairs:

VL-Voltage before Boosting (HYBRID CONTROL SYSTEM)
Power Resource VB (HYBRID CONTROL SYSTEM)
SMRB Control Status (HYBRID CONTROL SYSTEM)
SMRG Control Status (HYBRID CONTROL SYSTEM)