Hybrid Control System

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: U0028-437,U0037-438: Vehicle Communication Bus "A"
U0037-438 - Vehicle Communication Bus "B"

MONITOR DESCRIPTION

The Controller Area Network (CAN) is a serial data communication system for real-time application. It is a multiplex communication system designed for on-vehicle use that provides a superior communication speed of 500 kbps and a capability to detect malfunctions.

The hybrid vehicle control ECU sends and receives data to and from ECUs connected to the V1 bus and V2 bus. If a communication error occurs between the hybrid vehicle control ECU and one of these ECUs, the hybrid vehicle control ECU stores a DTC.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





* Connect the Techstream to the DLC3.

* Turn the power switch on (IG) and turn the Techstream on.

* Clear the DTCs Hybrid Control System.

* Turn the power switch off and wait for at least 30 seconds.

* Turn the power switch on (READY) and turn the Techstream on [A].

* Drive the vehicle for 10 minutes or more [B].

* Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

* Check for DTCs [C].

HINT
* If a DTC is output, the system is malfunctioning.
* If a DTC is not output, the system is normal.
INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Check for DTCs of all systems by following the prompts on the Techstream screen.

HINT
If DTCs other than CAN communication DTCs are output simultaneously, first repair the CAN communication problem, and then perform troubleshooting for other DTCs.

NEXT -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting