DTC C1259/58: HV System Regenerative Malfunction; DTC C1310/51: Malfunction in HV system [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

The skid control ECU (brake booster with master cylinder assembly) communicates with the power management control ECU and controls braking force according to the motor's regenerative force.

The skid control ECU (brake booster with master cylinder assembly) sends Enhanced-VSC signals to the power management control ECU and receives operating signals from the power management control ECU.

The skid control ECU (brake booster with master cylinder assembly) uses CAN communication for communicating with the power management control ECU. If a communication malfunction is detected, the skid control ECU (brake booster with master cylinder assembly) prohibits Enhanced-VSC operation and part of the electronically controlled brake system control as a fail-safe function.

If the signals from the power management control ECU returns to normal, the warning light will go off and the DTCs C1259/58 and C1310/51 will be cleared.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
C1259/58	-	The regeneration malfunction signal is input for at least 0.036 seconds when IG2 terminal voltage is 9.5 V or more for at least 2 seconds and communication with power management control ECU is valid.	Power management control ECU
C1310/51	-	The internal malfunction signal is input for at least 0.072 seconds when IG2 terminal voltage is 10.5 V or more for at least 2 seconds and communication with power management control ECU is valid.	Power management control ECU

HINT:

These DTCs will be output from the skid control ECU (brake booster with master cylinder assembly) when the power management control ECU sends a malfunction signal to the skid control ECU (brake booster with master cylinder assembly).