Lexus ES: Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range (P33DA1E,P33DB1E)
DESCRIPTION
The HV battery is composed of 70 cells (3.7 V each) in series. The battery ECU assembly monitors the internal resistance of each HV battery cell to detect malfunctions of the HV battery.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P33DA1E | Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range | The difference in internal resistance of each cell of the No. 1 HV supply stack sub-assembly exceeds the threshold. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
| P33DB1E | Hybrid/EV Battery Stack 2 Circuit Resistance Out of Range | The difference in internal resistance of each cell of the No. 2 HV supply stack sub-assembly exceeds the threshold. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P33DA1E | Hybrid/EV Battery Cell 1 to 70 Internal Resistance |
| P33DB1E |
The following items can be helpful when performing repairs:
- Hybrid/EV Battery Cell 1 to 70 Voltage
- Hybrid/EV Battery SOC
- Hybrid/EV Battery Voltage
- Hybrid/EV Battery Current
- Hybrid/EV Battery Temperature 1 to 6
HINT:
- These DTCs can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes.
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In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
- Make sure the air intake port for HV battery is not blocked.
- Make sure there are no gaps between the connecting parts of the ducts.
-
Clean the No. 1 HV battery intake filter.
- Clear the DTCs to reset the learning values even if no DTCs are stored.
MONITOR DESCRIPTION
If there is an abnormal internal resistance in the battery cells, the battery ECU assembly determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU assembly will illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Related DTCs | P33DA (INF P33DA1E), P33DB (INF P33DB1E): Battery cell malfunction |
| Required sensors/components | Battery ECU assembly / Battery current sensor |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | 1 driving cycle |
| Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
| Other conditions belong to TMC's intellectual property | - |
TYPICAL MALFUNCTION THRESHOLDS
| TMC's intellectual property | - |
COMPONENT OPERATING RANGE
| Battery ECU assembly | DTC P33DA (INF P33DA1E) is not detected DTC P33DB (INF P33DB1E) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
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After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
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Drive the vehicle on urban roads for approximately 10 minutes.[*1]
(This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.)
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
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Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
CAUTION / NOTICE / HINT
CAUTION:
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Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
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- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
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To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
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After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
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After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
*a
Without waiting for 10 minutes
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
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Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.
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When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.
*a
Dealer
*b
Battery Collection Agent
- Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.
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Before returning the HV battery, make sure to perform a recovery inspection.
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Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.
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- Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
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After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
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PROCEDURE
| 1. | CHECK DTC OUTPUT (HV BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery / Trouble Codes.
(d) Check if DTCs are output.
Powertrain > HV Battery > Trouble Codes| Result | Proceed to |
|---|---|
| "P33DA1E" is output. | A |
| "P33DB1E" is output. | B |
(e) Turn the power switch off.
| B | .gif) | GO TO STEP 4 |
|
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| 2. | CHECK TOTAL DISTANCE DRIVEN |
(a) Read the odometer to check the total distance the vehicle has been driven.
| Result | Proceed to | |
|---|---|---|
| Total distance driven is less than 200000 km (124280 mile) | A | |
| Total distance driven is 200000 km (124280 mile) or more | Current total distance driven - total distance driven when hybrid battery terminal block replaced = less than 200000 km (124280 mile) *1 | |
| Other than above | B | |
HINT:
*1: If the hybrid battery terminal block has been replaced, use the total distance driven since it was replaced.
| A | | REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY |
|
| 3. | REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY |
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| NEXT | | REPLACE HYBRID BATTERY TERMINAL BLOCK |
| 4. | CHECK TOTAL DISTANCE DRIVEN |
(a) Read the odometer to check the total distance the vehicle has been driven.
| Result | Proceed to | |
|---|---|---|
| Total distance driven is less than 200000 km (124280 mile) | A | |
| Total distance driven is 200000 km (124280 mile) or more | Current total distance driven - total distance driven when hybrid battery terminal block replaced = less than 200000 km (124280 mile) *1 | |
| Other than above | B | |
HINT:
*1: If the hybrid battery terminal block has been replaced, use the total distance driven since it was replaced.
| A | | REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY |
|
| 5. | REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY |
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| NEXT | | REPLACE HYBRID BATTERY TERMINAL BLOCK |
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