Lexus ES: Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)
DESCRIPTION
Refer to the description for DTC P0A8111.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A8196 | Hybrid/EV Battery Cooling Fan 1 Component Internal Failure | The battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.* *: This DTC is not stored when "Hybrid Battery Cooling Fan 1 Frequency" is excessively low or high. (2 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
| P0A8198 | Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature | The HV battery temperature is high and the battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.* *: This DTC is not stored when "Hybrid Battery Cooling Fan 1 Frequency" is excessively low or high. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P0A8196 |
|
| P0A8198 |
The following items can be helpful when performing repairs:
- Hybrid Battery Temperature 1 to 3
- BATT Voltage
HINT:
"Hybrid Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly rotation speed.
MONITOR DESCRIPTION
If the hybrid vehicle control ECU detects that the speed of the battery cooling blower assembly is outside the normal operating range, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Related DTCs | P0A82 (INF P0A8196): Hybrid/EV Battery Cooling Fan 1 Component Internal Failure P0A82 (INF P0A8198): Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature |
| Required sensors/components | Battery cooling blower assembly |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | 2 driving cycle / 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
| Hybrid vehicle control ECU | DTC P0A82 (INF P0A8196) is not detected DTC P0A82 (INF P0A8198) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
-
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 (READY) and turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Active Test / Control the Hybrid Battery Cooling Fan.[*1]
-
Operate the battery cooling blower assembly in each fan mode, 1 through 6, for 60 seconds or more.[*2]
HINT:
- Operation of the battery cooling blower assembly can be confirmed by checking if air is sucked into the air intake port of the intake duct.
-
[*1] to [*2]: 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 / Hybrid Control / Utility / All Readiness.
-
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.
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0A8111.
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CAUTION / NOTICE / HINT
CAUTION:
-
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
-
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
-
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.
-
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.
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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.
*a
Without waiting for 10 minutes
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 (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes| Result | Proceed to |
|---|---|
| P0AFC00 or P0AFC96 is not output. | A |
| P0AFC00 or P0AFC96 is output. | B |
(e) Turn the power switch off.
| B | .gif) | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
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| 2. | CHECK DUCT AND BLOWER |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the rear seat cushion leg sub-assembly.
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(c) Check that the No. 1 HV battery intake filter, battery cooling blower assembly, No. 1 hybrid battery intake duct and No. 1 hybrid battery intake duct LH are not disconnected, damaged, or clogged with foreign matter.
| *1 | No. 1 HV Battery Intake Filter | *2 | Battery Cooling Blower Assembly |
| *3 | No. 1 Hybrid Battery Intake Duct | *4 | No. 1 Hybrid Battery Intake Duct LH |
OK:
The No. 1 HV battery intake filter, No. 1 hybrid battery intake duct, No. 1 hybrid battery intake duct LH and battery cooling blower assembly blower are not disconnected, damaged, or clogged with foreign matter.
(d) Install the rear seat cushion leg sub-assembly.
| NG | | CORRECT THE PROBLEM |
|
| 3. | CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BATTERY COOLING BLOWER ASSEMBLY) |
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| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY COOLING BLOWER ASSEMBLY) |
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| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | CHECK HYBRID VEHICLE CONTROL ECU (GROUND SHORT CHECK) |
(a) Remove the hybrid vehicle control ECU.
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| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Install the hybrid vehicle control ECU.
| NG | | REPLACE HYBRID VEHICLE CONTROL ECU |
|
| 6. | READ VALUE USING TECHSTREAM (COOLING FAN FREQUENCY) |
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| Result | Proceed to |
|---|---|
| Both of the value in the Data List (Hybrid Battery Cooling Fan 1 Frequency) and the actual measured value at the battery voltage sensor connector are 0 Hz. | A |
| Other than above | B |
| B | | GO TO STEP 8 |
|
| 7. | CHECK BATTERY VOLTAGE SENSOR |
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| OK | | REPLACE BATTERY COOLING BLOWER ASSEMBLY |
| NG | | REPLACE BATTERY VOLTAGE SENSOR |
| 8. | CHECK BATTERY VOLTAGE SENSOR (FREQUENCY) |
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| OK | | REPLACE BATTERY COOLING BLOWER ASSEMBLY |
| NG | | REPLACE BATTERY VOLTAGE SENSOR |
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