DESCRIPTION
General causes of battery depletion include the switches of electrical devices mistakenly left on, service life of the battery, charging device malfunction, or application of excessive electrical load by the customer, etc.
Therefore, it is important to properly grasp the usage conditions of the customer's vehicle and carry out appropriate troubleshooting (systematized failure diagnosis).
HINT:
If the power is mistakenly left on, the History of Reason for Operation may remain in the certification ECU (smart key ECU assembly).*1
PROCEDURE
1. |
CUSTOMER PROBLEM ANALYSIS |
(a) Carry out customer problem analysis with the customer, and check the vehicle condition and usage conditions at the time of battery depletion.
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2. |
CHECK BATTERY |
Click here
HINT:
If the result of the battery inspection is NG, charge or replace the battery according to the inspection result, and proceed to the next step.
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3. |
CHECK DTC OUTPUT |
(a) Perform the Health Check using the GTS.
(b) Check the DTCs.
Result |
Proceed to |
---|---|
DTCs are not output |
A |
DTCs are output |
B |
B |
GO TO DTC CHART |
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4. |
CHECK VEHICLE CONTROL HISTORY (RoB) |
HINT:
Some of the control history can be checked from "Vehicle Control History (RoB)".
Click here
(a) Record the output control history.
Powertrain > Engine > Utility
Tester Display |
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Vehicle Control History (RoB) |
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5. |
CONFIRM VEHICLE CONTROL HISTORY (RoB) (AUXILIARY BATTERY DISCHARGE AT IG OFF) |
(a) Check that "Auxiliary Battery Discharge at IG OFF" is not output in Vehicle Control History (RoB).
HINT:
A history is stored when the following conditions are met at the same time.
Result |
Proceed to |
---|---|
"Auxiliary Battery Discharge at IG OFF" is not output |
A |
"Auxiliary Battery Discharge at IG OFF" is output |
B |
A |
GO TO STEP 7 |
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6. |
CHECK DARK CURRENT |
(a) Turn all switches off and turn the ignition switch off.
(b) Wait for 30 minutes or more with the door lock locked.
HINT:
(c) Check the dark current. Result:
HINT:
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B |
GO TO STEP 15 |
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7. |
CONFIRM VEHICLE CONTROL HISTORY (RoB) (AUXILIARY BATTERY DISCHARGE AT RUNNING) |
(a) Check that "Auxiliary Battery Discharge at Running" is not output in Vehicle Control History (RoB).
HINT:
A history is stored if one of the following conditions is met.
Result |
Proceed to |
---|---|
"Auxiliary Battery Discharge at Running" is not output |
A |
"Auxiliary Battery Discharge at Running" is output |
B |
B |
GO TO STEP 11 |
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8. |
CONFIRM VEHICLE CONTROL HISTORY (RoB) (AUXILIARY BATTERY VOLTAGE LOW AT IG OFF) |
(a) Check that "Auxiliary Battery Voltage Low at IG OFF" is not output in Vehicle Control History (RoB).
HINT:
A history is stored when the ignition switch is off and the battery voltage is 11.5 V or less continuously for 10 minutes or more.
Result |
Proceed to |
---|---|
"Auxiliary Battery Voltage Low at IG OFF" is not output |
A |
"Auxiliary Battery Voltage Low at IG OFF" is output |
B |
B |
GO TO STEP 13 |
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9. |
CHECK CUSTOMER PROBLEM ANALYSIS RESULT |
(a) Based on the result of customer problem analysis, check the factors that may lead to battery depletion.
Result |
Proceed to |
---|---|
No problems |
A |
Illumination, such as cabin and luggage illumination, is mistakenly left on |
B |
Ignition switch is left to ACC or ON (ignition switch is mistakenly left on) |
C |
Optional electrical components are mistakenly left on |
D |
The storage location of the electrical key is within 1 m (3.28 ft.) from the vehicle |
E |
When the customer drives for 30 minutes or less a week |
F |
HINT:
If this applies, have the customer change the storage location of the electrical key transmitter sub-assembly (electrical key) to an area that is separated from the vehicle by at least 2 m (6.56 ft.).
B |
EFFECTS OF ILLUMINATION ETC. BEING MISTAKENLY LEFT ON |
C |
EFFECTS OF IGNITION SWITCH BEING MISTAKENLY LEFT ON |
D |
EFFECTS OF POWER BEING MISTAKENLY LEFT ON |
E |
EFFECTS OF FREQUENT ELECTRICAL KEY DETECTION |
F |
EFFECTS OF INSUFFICIENT CHARGE DUE TO LOW USAGE FREQUENCY |
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10. |
USE SIMULATION METHOD TO CHECK |
(a) Check that all the switches installed in the vehicle for systems that operate with the ignition switch off operate normally.
Examples of Switches that Function with Ignition Switch Off
Switch |
Operation |
---|---|
Door handle switch |
Hold and pull door handle |
Door courtesy switch |
Open/close door |
Luggage door switch |
Press switch |
Pawl switch, half latch switch |
Jiggle with the door and/or luggage closed (open/close operation) |
Dimmer switch |
Headlight flashing, headlight on/off |
Door lock switch |
Lock, unlock |
Slide door open switch |
Sliding door open/close operation |
Luggage opener switch |
Press switch |
Fuel lid opener switch |
Opening operation |
Power seat switch |
Power seat operation |
Intrusion sensor OFF switch |
Intrusion sensor on/off |
(b) Operate each switch while checking the dark current, and check that the dark current drops to 120 mA or less after operation.
NOTICE:
The electrical tester may become damaged due to an increase in dark current from switch operation. Therefore, check the dark current with the electrical tester measurement range set at maximum, and drop the measurement range gradually according to the changes in current.
HINT:
After checking that the dark current drops to 120 mA or less, check the next switch.
Result |
Proceed to |
---|---|
Malfunction is not reproduced |
A |
Malfunction is reproduced |
B |
A |
CHECK FOR INTERMITTENT PROBLEMS |
B |
REPAIR OR REPLACE MALFUNCTIONING PARTS |
11. |
INSPECT GENERATOR ASSEMBLY |
Click here
NG |
REPAIR OR REPLACE GENERATOR ASSEMBLY |
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12. |
CHECK VEHICLE CONDITION (EXISTENCE OF OPTIONAL COMPONENTS) |
(a) Check the customer problem analysis chart and vehicle, and check whether there are any optional electrical components.
Result |
Proceed to |
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Optional electrical components are not installed |
A |
Optional electrical components are installed |
B |
A |
GO TO STEP 8 |
B |
GO TO STEP 14 |
13. |
READ VALUE USING GTS (TIME OF LONG TERM LEAVING WITH IG OFF (1ST, 2ND, 3RD)) |
(a) Check "Time of Long Term Leaving with IG OFF (1st, 2nd, 3rd)".
HINT:
A history is stored when the ignition switch is off continuously for 60 days.
Powertrain > Engine > Data List
Tester Display |
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Time of Long Term Leaving with IG OFF (1st) |
Time of Long Term Leaving with IG OFF (2nd) |
Time of Long Term Leaving with IG OFF (3rd) |
Result |
Proceed to |
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"Time of Long Term Leaving with IG OFF (1st, 2nd, 3rd)" are all 0 days |
A |
Any "Time of Long Term Leaving with IG OFF (1st, 2nd, 3rd)" is 60 days or more |
B |
A |
GO TO STEP 10 |
B |
EFFECT FROM LONG-TERM STORAGE |
14. |
CHECK CURRENT CONSUMPTION OF OPTIONAL COMPONENTS |
Result |
Proceed to |
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Current consumption is below 10 A |
A |
Current consumption is 10 A or higher |
B |
A |
GO TO STEP 8 |
B |
EFFECT FROM OPTIONAL COMPONENTS |
15. |
CHECK VEHICLE CONDITION (EXISTENCE OF OPTIONAL COMPONENTS) |
(a) Check the customer problem analysis chart and vehicle, and check whether there are any optional electrical components.
Result |
Proceed to |
---|---|
Optional electrical components are not installed |
A |
Optional electrical components are installed |
B |
A |
GO TO STEP 17 |
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16. |
CHECK DARK CURRENT (REMOVE OPTIONAL COMPONENTS) |
(a) Remove optional electrical components.
NOTICE:
Check the installation condition of the electrical components carefully before removal.
(b) Check the dark current.
Result |
Proceed to |
---|---|
Decreases to 120 mA or less |
A |
Remains higher than 120 mA |
B |
HINT:
If the negative (-) circuit is disconnected, leave the unit for 30 minutes or more with the electrical tester connected between the negative (-) terminal of the battery and the terminal in series, and check the dark current once the current is stable.
(c) Install the optional electrical components.
A |
EFFECT FROM OPTIONAL COMPONENTS |
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17. |
CHECK SWITCH (STUCK ON INSPECTION) |
(a) Check all the switches installed in the vehicle for systems that operate with the ignition switch off to determine whether they are stuck ON.
HINT:
Door handle switch |
Door courtesy switch |
Luggage door switch |
Pawl switch, half latch switch |
Dimmer switch |
Door lock switch |
Slide door open switch |
Luggage opener switch |
Fuel lid opener switch |
Power seat switch |
Intrusion sensor OFF switch |
Result |
Proceed to |
---|---|
No switch malfunction |
A |
Switch malfunction |
B |
B |
REPLACE MALFUNCTIONING PARTS |
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18. |
CHECK DARK CURRENT (NARROW DOWN MALFUNCTIONING SYSTEM) |
(a) Narrow down the malfunctioning system by checking the dark current while removing fuses starting from the one closest to the system, actuator or ECU (farthest from the power source).
HINT:
HINT:
If the negative (-) circuit is disconnected, leave the unit for 30 minutes or more with the electrical tester connected between the negative (-) terminal of the battery and the terminal in series, and check the dark current once the current is stable.
NEXT |
CHECK AND REPAIR MALFUNCTIONING SYSTEM |