BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1259,C1310; HV Control System Regenerative Malfunction; 2021 MY RAV4 RAV4 HV [08/2020

DESCRIPTION

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

The skid control ECU (brake booster with master cylinder assembly) sends VSC (cooperative control with EPS) signals to the hybrid vehicle control ECU assembly and receives operating signals from the hybrid vehicle control ECU assembly.

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

If the signals from the hybrid vehicle control ECU assembly return to normal, the warning light will go off and the DTCs C1259 and C1310 will be cleared.

HINT:

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

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1259

HV Control System Regenerative Malfunction

A regeneration malfunction signal is input for at least 0.036 seconds when IG2 terminal voltage is 9.5 V higher than for at least 2 seconds and communication with the hybrid vehicle control ECU assembly is valid.

Hybrid vehicle control ECU assembly (Regeneration malfunction)

C1310

HV System Malfunction

431

INF Code: 431
- The hybrid control malfunction signal is received for at least 0.072 seconds from hybrid vehicle control ECU assembly.
INF Code: -
- An internal malfunction signal is input for at least 0.072 seconds when IG2 terminal voltage is 9.5 V higher than for at least 2 seconds and communication with the hybrid vehicle control ECU assembly is valid.

INF Code: 431
- Hybrid control system (Brake hold control malfunction)
INF Code: -
- Hybrid vehicle control ECU assembly (VSC control malfunction)

PROCEDURE

CHECK HYBRID CONTROL SYSTEM

(a) Check if a hybrid control system DTC is output.

for NICKEL METAL HYDRIDE BATTERY: Click here

2019 - 2022 MY RAV4 HV [02/2019 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): DTC CHECK / CLEAR

for LITHIUM-ION BATTERY: Click here

2020 - 2022 MY RAV4 HV [06/2020 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): DTC CHECK / CLEAR

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

DTCs are not output.

DTCs are output

INSPECT HYBRID CONTROL SYSTEM

for NICKEL METAL HYDRIDE BATTERY: Click here

for LITHIUM-ION BATTERY: Click here