DESCRIPTION
Refer to the description for DTC P0ABF11.
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DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
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P0ABF28 | Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure | The offset value of the battery current sensor is excessively large. (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
DTC No. | Data List |
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P0ABF28 |
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HINT:
*1: The value of "Hybrid Battery Current for Hybrid Battery Control" usually changes by 4 A or more while the vehicle is accelerating and decelerating.
MONITOR DESCRIPTION
If the battery voltage sensor detects a malfunction in the battery current sensor, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
Related DTCs | P0AC0 (INF P0ABF28): Current sensor malfunction |
Required sensors/components | 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 voltage sensor | DTC P0AC0 (INF P0ABF28) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
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HINT:
[*1] to [*4]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
HINT:
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0ABF11.
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CAUTION / NOTICE / HINT
CAUTION:
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*a | Without waiting for 10 minutes |
HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
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 |
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P0AFC00, P0AFC96 or P0A9563 is not output. | A |
P0AFC00, P0AFC96 or P0A9563 is output. | B |
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
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2. | CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HV BATTERY JUNCTION BLOCK ASSEMBLY) |
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NG | REPLACE HYBRID BATTERY THERMISTOR |
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3. | CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR (IB)) |
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 No. 1 hybrid battery exhaust duct.
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(c) Connect the cable to the negative (-) auxiliary battery terminal.
(d) Turn the power switch on (IG).
(e) Using a toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.
NOTICE:
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(f) Using a toyota electrical tester set to 4 V, measure the IB0 voltage according to the value(s) in the table below.
NOTICE: Be sure to set the toyota electrical tester to 4 V when performing this test. |
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(g) Compare the measured values of the IB0 terminal voltage and VIB terminal voltage using the following formula:
IB0 voltage - VIB Voltage / 2 = less than 0.081 V |
IB0 voltage - VIB Voltage / 2 = -0.081 V or higher |
Result | Proceed to |
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Within the specified range above | A |
Other than above | B |
(h) Turn the power switch off.
(i) Disconnect the cable from the negative (-) auxiliary battery terminal.
(j) Install the No. 1 hybrid battery exhaust duct.
HINT:
When the power switch is on (IG) the actual current will be approximately 0 A. The following graph shows the relation of the actual output voltage of the battery current sensor terminal IB0 and actual current used for DTC judgment.
B | REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |
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4. | REPLACE BATTERY VOLTAGE SENSOR |
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5. | SIMULATION TEST |
(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) Clear the DTCs and freeze frame data.
Powertrain > Hybrid Control > Clear DTCs(e) Drive the vehicle on urban roads for approximately 10 minutes.
(f) Turn the power switch off and wait for 2 minutes or more.
(g) Turn the power switch on (IG) and wait for 10 seconds or more.
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6. | RECONFIRM 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) Read output DTCs.
Powertrain > Hybrid Control > Trouble Codes Result | Proceed to |
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P0ABF28 is not output. | A |
P0ABF28 is output. | B |
(e) Turn the power switch off.
A | END |
B | REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |