BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1259,C1310; HV Control System Regenerative Malfunction; 2019 - 2024 MY Camry HV [09/2018

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM100000001E82V
Model Year Start: 2019	Model: Camry HV	Prod Date Range: [09/2018 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1259,C1310; HV Control System Regenerative Malfunction; 2019 - 2024 MY Camry HV [09/2018 - ]

DTC

C1259

HV Control System Regenerative Malfunction

DTC

C1310

HV System Malfunction

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 enhanced-VSC 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 enhanced-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

MIL

Note

C1259

HV Control System Regenerative Malfunction

1132

A 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 the hybrid vehicle control ECU assembly is valid.

Hybrid vehicle control ECU assembly
(Regeneration malfunction)
Skid control ECU (brake booster with master cylinder assembly)

Does not come on

Electronically controlled brake system DTC

HINT:

The DTC is cleared when the conditions return to normal.

C1310

HV System Malfunction

1140

1141

INF Code: 1140
- When the IG2 terminal voltage is 9.5 V or more for 2 seconds or more and communication with the hybrid vehicle control ECU assembly is possible, an internal malfunction signal is detected for 0.072 seconds or more.

INF Code: 1141
- The hybrid control malfunction signal is received for at least 0.072 seconds from hybrid vehicle control ECU assembly.

INF Code: 1140
- Hybrid vehicle control ECU assembly
  (VSC malfunction)
- Skid control ECU (brake booster with master cylinder assembly)
INF Code: 1141
- Hybrid vehicle control ECU assembly
  (Brake hold control malfunction)
- Skid control ECU (brake booster with master cylinder assembly)

Does not come on

INF Code 1140: VSC DTC
HINT:

The DTC is cleared when the conditions return to normal.
INF Code 1141: Brake hold DTC
HINT:

The DTC is cleared when the conditions return to normal.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

PROCEDURE

1.	CHECK DTC (HYBRID CONTROL SYSTEM)

(a) Check if a hybrid control system DTCs are output.

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

INSPECT HYBRID CONTROL SYSTEM

for Nickel Metal Hydride Battery: Click here

for Lithium-ion Battery: Click here

2.	CHECK DTC (MOTOR GENERATOR CONTROL SYSTEM)

(a) Check if a motor generator control system DTCs are output.

Powertrain > Motor Generator > Trouble Codes

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

INSPECT MOTOR GENERATOR CONTROL SYSTEM

for Nickel Metal Hydride Battery: Click here

for Lithium-ion Battery: Click here

3.	CHECK DTC (SFI SYSTEM)

(a) Check if a SFI system DTCs are output.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTCs are not output (for Lithium-ion Battery).	A
DTCs are not output (for Nickel Metal Hydride Battery).	B
DTCs are output.	C

GO TO STEP 5

INSPECT SFI SYSTEM

4.	CHECK DTC (HYBRID BATTERY SYSTEM)

(a) Check if a hybrid battery system DTCs are output.

Powertrain > HV Battery > Trouble Codes

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

INSPECT HYBRID BATTERY SYSTEM

5.	RECONFIRM DTC

(a) Clear the DTCs.

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(d) Check if the same DTC is output.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTCs C1259 and/or C1310 are output.	A
DTCs other than C1259 and C1310 are output.	B
DTCs are not output.	C

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

USE SIMULATION METHOD TO CHECK