HYBRID / BATTERY CONTROL HYBRID BATTERY SYSTEM DIAGNOSIS SYSTEM
DESCRIPTION
The hybrid vehicle control ECU has a self-diagnosis system. If the computer, Hybrid Control System, or a component is not working properly, the ECU records the conditions that relate to the fault. The ECU also illuminates the master warning in the combination meter assembly and provides other appropriate messages on the multi-information display, such as the HV system warning message, HV battery warning message, or discharge warning message.
CHINA NATIONWIDE STAGE 6
When troubleshooting On-Board Diagnostic (OBD) vehicles, the vehicle must be connected to the scan tool (complying with ISO 15765-4). Various data output from the vehicle's computer can then be read.
OBD regulations require that the vehicle's on-board computer illuminate the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in:
The emission control system and components.
The powertrain control components which affect vehicle emissions.
The computer.
In addition, the applicable Diagnostic Trouble Codes (DTCs) prescribed by ISO 15765-4 are stored in the computer memory. If the malfunction does not reoccur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain stored in the computer memory.
To check DTCs, connect the GTS or scan tool to the Data Link Connector 3 (DLC3) of the vehicle.
The scan tool displays DTCs, the Freeze Frame Data and a variety of hybrid control data.
The DTCs and Freeze Frame Data can be cleared using the scan tool.
2 TRIP DETECTION LOGIC
When a malfunction is first detected, the malfunction is temporarily stored in the battery ECU assembly memory (1st trip). If the same malfunction is detected during the next drive cycle, the MIL is illuminated (2nd trip).
FREEZE FRAME DATA
The battery ECU assembly records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.
AUXILIARY BATTERY VOLTAGE
- Standard Voltage:
Switch Condition Specified Condition Ignition switch ON 11 to 14 V
If voltage is below 11 V, replace or recharge the auxiliary battery.
- NOTICE:
- ·
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
·When disconnecting and reconnecting the auxiliary battery
- HINT:
-
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
·After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) unless instructed by the repair manual.
MIL (Malfunction Indicator Lamp)
The MIL is illuminated when the ignition switch is first turned to ON, before the READY light comes on.
When the READY indicator turns on, the MIL should turn off. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system.
- HINT:
-
If the MIL is not illuminated when the ignition switch is first turned to ON, check the MIL circuit.
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for SFI System: Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>MIL Circuit202307,999999,_51,_144956,_0604911,RM100000002BWSX,