SUB BATTERY SYSTEM DATA LIST / ACTIVE TEST


  1. Data List

    Note


    • Some Data List values may vary significantly if there are slight differences in the environment in which the vehicle is operating when measurements are obtained. Variations may also occur due to aging of the vehicle. Due to these considerations, it is not always possible to provide definite values to be used for judgment of malfunctions. It is possible that a malfunction may be present even if measured values are within the reference range.

    • In the event of a problem with intricate symptoms, collect sample data from another vehicle of the same model operating under identical conditions in order to reach an overall judgment by comparing all the items in the Data List.


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Sub Battery Module / Data List.

    5. Check the results by referring to the following table.


    Body Electrical > Sub Battery Module > Data List
    Tester Display Measurement Item Range Normal Condition Diagnostic Note
    Sub Battery Module Low Voltage Count This parameter indicates the number of times the sub-battery module has been determined as low voltage. 0 to 255 0 to 255

    • The number of times that the sub-battery module detected that the auxiliary battery voltage was low (below 10 V for 2 seconds) or momentarily stopped (below 8 V).

    • When the sub-battery module detects that the auxiliary battery voltage is low or momentarily stopped, it opens the backup relay to supply sub-battery power only to connected vehicle electrical loads.
    Backup Relay Low Voltage Count This parameter indicates the number of times the backup relay has been determined as low voltage. 0 to 255 0 to 255

    • The number of times that the backup relay detected that the auxiliary battery voltage momentarily stopped (below 8 V).

    • When the backup relay detects that the auxiliary battery voltage is momentarily stopped, it notifies the sub-battery module of the condition. When the sub-battery module receives the notification, it opens the backup relay to supply sub-battery power only to connected vehicle electrical loads.
    Sub Battery Module Voltage This parameter indicates the voltage of the sub-battery. 0 to 65.535 V 11 to 15 V

    • This is the sub-battery voltage as measured using the voltage sensor built into the sub-battery module.

    • When the protection relay is closed, the sub-battery voltage is the same as the voltage between the -BAT terminal and +BAT terminal of the sub-battery module. Furthermore, when the backup relay is also closed, the Sub Battery Module Voltage is approximately the same as the auxiliary battery voltage.
    Sub Battery Module Current This parameter indicates the current of the sub-battery. -300 to 300 A -100 to 100 A

    • This is the current flowing through the sub-battery as measured using the current sensor built into the sub-battery module. A negative value indicates that the sub-battery is being discharged, and a positive value indicates that it is being charged.

    • When the protection relay is open, the Sub Battery Module Current is approximately 0 A.
    Sub Battery Module Temperature This parameter indicates the temperature of the sub-battery. -50 to 120°C (-58 to 248°F) -30 to 75°C (-22 to 167°F)

    • This is the temperature as measured using the temperature sensor installed near the sub-battery in the sub-battery module.

    • When charge and discharge current flows through the sub-battery, the sub-battery grows warmer due to the effects of the its internal resistance.
    Sub Battery Module State of Charge This parameter indicates the capacity of the sub-battery. 0 to 100% 10 to 100%

    • Sub-battery capacity = Current charge / Nominal battery capacity

    • The sub-battery capacity is the estimated value that is calculated based on the sub-battery current, volume and temperature.

    • When the vehicle is left alone for a long period of time, it may cause the sub-battery capacity to drop below 10%, but this is not a malfunction.
    Sub Battery Module State of Health This parameter indicates the battery deterioration rate of the sub-battery module. 0 to 100% 24 to 100%

    • This displays the sub-battery deterioration rate.

    • The SOH of a new sub-battery is 100%. The SOH gradually decreases as a result of deterioration. When it is 24% or less, replacement is necessary.
    Sub Battery Module Internal Resistance This parameter indicates the internal resistance value of the sub-battery. 0 to 1.27 Ohm 0.005 to 0.5 Ohm The sub-battery module measures its own internal resistance based on the correlation between the sub-battery current and sub-battery voltage.
    Protection Relay FET Temperature1 This parameter indicates the temperature of the Protection Relay FET1. -50 to 120°C (-58 to 248°F) -30 to 105°C (-22 to 221°F)

    • This is the temperature as measured using the temperature sensor installed near the protection relay in the sub-battery module.

    • A total of 2 temperature sensors are installed near the protection relay in the sub-battery module.
    Protection Relay FET Temperature2 This parameter indicates the temperature of the Protection Relay FET2. -50 to 120°C (-58 to 248°F) -30 to 105°C (-22 to 221°F)

    • This is the temperature as measured using the temperature sensor installed near the protection relay in the sub-battery module.

    • A total of 2 temperature sensors are installed near the protection relay in the sub-battery module.
    Auxiliary Battery Voltage Sub-battery module assembly B (+B) terminal voltage 0 to 65.535 V 11 to 14 V: Idling This is the voltage of the B (+B) terminal of the sub-battery module as measured by the sub-battery module.
    Auxiliary Battery Voltage for Gear Lever Position Sensor Sub-battery module assembly +BAT terminal voltage 0 to 65.535 V

    • 11 to 15 V: Backup relay ON

    • 0 to 1 V: Protection relay OFF and backup relay OFF

    		 This is the voltage of the +BAT terminal of the sub-battery module as measured by the sub-battery module.
    Backup Relay Status This parameter indicates the status of the backup relay. ON/OFF ON: Backup relay ON -
    Protection Relay Status This parameter indicates the status of the protection relay. ON/OFF ON: Protection relay ON -
    Hybrid Powertrain Control Module This parameter indicates the availability of Hybrid system. Without/With With

    • Without: Not equipped with Hybrid system

    • With: Equipped with Hybrid system
    Stop and Start Control Module This parameter indicates the availability of Stop and Start System. Without/With Without

    • Without: Not equipped with Hybrid system

    • With: Equipped with Stop and Start System
    Power Switch Status This parameter indicates the status of the power switch. ON/OFF ON: Power switch on (READY) -
    Engine Status This parameter indicates the status of the Engine. ON/OFF ON: Engine running -
    Backup Relay Active Preparation Status This parameter indicates the status of the backup relay active preparation. ON/OFF -

    • The sub-battery module performs backup relay active preparation a few seconds before the backup relay is switched on or off.

    • Backup relay active preparation is a control that is performed to suppress sudden changes in the auxiliary battery voltage that occur when the backup relay is switched on and off.
    Sub Battery Module Control Status This parameter indicates the status of the sub-battery module control. ECU Sleep /Self Wake-up / ECU Sleep Transition / IG ON / Normal / Sub Battery Module Back-up / Abnormal -

    • This is the control condition number in the sub-battery module.

    • While the power switch is on (IG), this parameter displays one of the following values: "ON", "Normal", "Sub Battery Module Back-up" or "Abnormal".
    Power Generator Voltage Request Status This parameter indicates the status of the power generator voltage request. Power Generator Voltage Not Request / Power Generator Voltage Up / Internal Resistance Calculate Mode -

    • When the remaining capacity of the sub-battery is extremely low, the sub-battery module sends a power generator voltage up request to the generator to restore the capacity to normal.

    • While the sub-battery module is measuring its own internal resistance, the sub-battery module sends its internal resistance calculation mode to the generator.
    Stop&Start of Engine State Stop and start control status IG / Run / Stopreq / Stop / Restart

    • IG: Engine stopped

    • Run: Engine running

    • Stopreq: Engine stop requested

    • Stop: Engine stopped (by stop and start control)

    • Restart: Engine restarted

    		 -
    Charging Control Mode This parameter indicates the charging control mode. SOC Keep / Auxiliary Charge / Refresh Charge / Normal / High/Low Temperature / Abnormal / SOC Calculate / Normal - This is the charging control condition sent by the ECM via CAN communication.
    Voltage Change Status This parameter indicates the status of the voltage change. ON/OFF - This is the DC/DC overwrite control prohibition flag sent by the hybrid vehicle control ECU via CAN communication.
    BRin Duty This parameter indicates BRin input duty value. 0 to 100% 20 or 40%

    • This is the duty ratio of the PWM signal* input to the BR (BRin) terminal of the sub-battery module.

    • When the sub-battery module receives a PWM signal within the duty ratio range of 15 to 25%, this item displays 20% (same as other duty ratios).
    BURDIAG1 Duty This parameter indicates BURDIAG1 input duty value. 0 to 100% 40 or 60 or 80%

    • This is the duty ratio of the PWM signal input to the RD1 (BURDIAG1) terminal of the sub-battery module.

    • When the sub-battery module receives a PWM signal* within the duty ratio range of 35 to 45%, this item displays 40% (same as other duty ratios).
    BURDIAG2 Duty This parameter indicates BURDIAG2 input duty value. 0 to 100% 90%

    • This is the duty ratio of the PWM signal* input to the RD2 (BURDIAG2) terminal of the sub-battery module.

    • When the sub-battery module receives a PWM signal* within the duty ratio range of 85 to 95%, this item displays 90%.
    ROout Duty This parameter indicates ROout output duty value. 0 to 100% 20 or 40 or 60% This is the duty ratio of the PWM signal* output from the RO (ROout) terminal of the sub-battery module.
    BUR Duty This parameter indicates BUR output duty value. 0 to 100% 60 or 80%

    • This is the duty ratio of the PWM signal* output from the BUR terminal of the sub-battery module.

    • 60%: Backup relay open request

    • 80%: Backup relay close request
    Protection Relay Open This parameter indicates the number of times the Protection Relay has been changed from closed to open. 0 to 1048575 - -
    Protection Relay Close This parameter indicates the number of times the Protection Relay has been changed from open to closed. 0 to 1048575 - -
    Backup Relay Open This parameter indicates the number of times the Backup Relay has been changed from closed to open. 0 to 1048575 - -
    Backup Relay Close This parameter indicates the number of times the Backup Relay has been changed from open to closed. 0 to 1048575 - -
    Protection Relay Overheat This parameter indicates the number of times "Protection Relay Overheat" has been confirmed. 0 to 65535 - -
    Protection Relay Overcurrent This parameter indicates the number of times "Protection Relay Overcurrent" has been confirmed. 0 to 65535 - The number of times that the protection relay was opened to shut off overcurrent to protect the sub-battery from damage.
    Backup Relay Overheat This parameter indicates the number of times "Backup Relay Overheat" has been confirmed. 0 to 65535 - -
    Backup Relay Overcurrent This parameter indicates the number of times "Backup Relay Overcurrent" has been confirmed. 0 to 65535 - -

    *: PWM communication (Pulse Width Modulation: Modulates pulse width according to duty ratio)

  2. Active Test

    Using the GTS to perform Active Tests allows relays to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Sub Battery Module / Active Test.

    5. According to the display on the GTS perform the appropriate Active Test.


    Body Electrical > Sub Battery Module > Active Test
    Tester Display Measurement Item Diagnostic Note
    Protection Relay Turn protection relay on and off IG ON
    Backup Relay Turn backup relay on and off IG ON