Hybrid Battery System [diagnostic Codes] Toyota Prius V I

Scheme 501

1. The battery smart unit and the power management control ECU calculate the SOC (state of charge) of the HV battery through the accumulated amperage in the HV battery. The battery smart unit sends the condition of the HV battery to the power management control ECU. Then the power management control ECU calculates the SOC based on the information and controls HV battery charge and discharge according to the driving condition. DTC No. DTC Detection Condition Trouble Area P0A7F-123 Internal resistance of the HV battery is higher than the standard (1 trip detection) Difference in the capacity between battery blocks is larger than the standard (2 trip detection) HV battery Battery smart unit HINT: P0A7F-123 will not be set unless the vehicle is driven for approximately 10 minutes after clearing the DTC.

MONITOR DESCRIPTION

1. The battery smart unit calculates the resistance of the HV battery through amperage and voltage, and uses this resistance to determine the extent of deterioration of the HV battery. If the battery smart unit detects that the resistance of the HV battery has exceeded the standard, it determines that a malfunction has occurred. In addition, the battery smart unit monitors the SOC, and if the difference between the maximum and minimum SOC values exceeds the standard, it determines that a malfunction has occurred. When either of the malfunction detection conditions is met, the power management control ECU (HV CPU) illuminates the MIL and set a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

Scheme 502

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Turn the power switch on (READY) and wait for 30 seconds or more.
7. Drive the vehicle on urban roads at a speed of 40 km/h (25 mph) or more for a total of at least 10 minutes. [A] NOTE: Avoid abrupt acceleration or braking.
8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
9. Check that permanent DTCs are cleared.
10. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

Scheme 503

1. CHECK DTC OUTPUT (HYBRID CONTROL) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Read output DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Result Result Proceed to P0AFC-123 is not output. A P0AFC-123 is also output. B Disconnect the Techstream from the DLC3. B --> See step 5 A: Go to next step
2. CHECK BATTERY SMART UNIT Ensure the safety of the areas in front and at the back of the vehicle. Connect the Techstream to the DLC3. Turn the power switch on (READY). Enter the following menus: Powertrain / Hybrid Control / Data List / Battery block Vol - V01 to V14. Fully warm up the engine and turn the air conditioning off. Firmly depress the brake pedal with your left foot. Move the select lever to D. Record each battery block voltage from the data list (Battery block Vol -V01 to V14) while fully depressing the accelerator pedal. Compare the battery block voltages (Battery block Vol -V01 to V14) between the even and odd number groups in each combination shown in the table below. Odd Number Group Even Number Group Battery Block Voltages to be Compared Battery block Vol - V01 Battery block Vol - V02 V01 - V02 Battery block Vol - V03 Battery block Vol - V04 V03 - V04 Battery block Vol - V05 Battery block Vol - V06 V05 - V06 Battery block Vol - V07 Battery block Vol - V08 V07 - V08 Battery block Vol - V09 Battery block Vol - V10 V09 - V10 Battery block Vol - V11 Battery block Vol - V12 V11 - V12 Battery block Vol - V13 Battery block Vol - V14 V13 - V14 Check the difference between each pair of battery block voltages. Result Result Proceed to Difference in voltage of all 7 pairs of blocks is 0.3 V or more. A Other than above. B HINT: When an internal malfunction occurs in the battery smart unit, this symptom (difference in voltage of 0.3 V or more for all 7 pairs of blocks) will occur. Turn the power switch off. Disconnect the Techstream from the DLC3. B --> See step 4 A --> See step 3
3. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
4. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
5. GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to «DTC P0AFC-123: Hybrid Battery Pack Sensor Module»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes)

Scheme 504

1. The HV battery uses nickel metal-hydride batteries and does not require external charging. The power management control ECU controls the SOC (state of charge) of the HV battery at a constant level during driving. The HV battery is composed of 28 modules, and each module consists of six 1.2 V cells in series. The battery smart unit monitors battery block voltage at 14 locations. Each battery block is composed of 2 modules in a set. DTC No. DTC Detection Condition Trouble Area P0A80-123 Difference in voltage between battery blocks is larger than the standard (2 trip detection) HV battery Battery smart unit HINT: P0A80-123 will not be set unless the vehicle is driven for approximately 10 minutes after clearing the DTC.

The battery smart unit, which monitors the voltage of the battery blocks, determines that malfunction has occurred if a voltage difference between the battery blocks exceeds the standard. When the malfunction detection condition is satisfied, the power management control ECU (HV CPU) will illuminates the MIL and set a DTC.

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform a universal trip.
7. With the select lever in N, leave the vehicle until SOC drops to 30 %. HINT: Although DTC P3000 (INF 388) may be stored if the SOC drops to 20 % or lower, this is not a malfunction.
8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
9. Check that permanent DTCs are cleared. HINT: If the permanent DTC is not cleared, repeat steps 6 and 7. If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

PROCEDURE

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK BATTERY SMART UNIT See step 2 B --> See step 4 A --> See step 3
3. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
4. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

DESCRIPTION

1. Refer to the circuit description for DTC P0A84-123. Refer to «DESCRIPTION»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes) .

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A84-123. Refer to WIRING DIAGRAM .

Note. 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. Refer to PRECAUTION .

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1. CHECK FOR DTCS (HV) See step 1 B --> See step 8 A: Go to next step
2. CHECK DUCT AND BLOWER Check that the No. 1 hybrid battery intake duct and battery cooling blower are not disconnected, damaged, or clogged with foreign objects, and that the acoustical materials have not peeled. OK The duct and blower are not disconnected, damaged, or clogged with foreign objects and the acoustical materials have not peeled. TEXT IN ILLUSTRATION *1 No. 1 Hybrid Battery Intake Duct NG --> CORRECT THE PROBLEM OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - POWER MANAGEMENT CONTROL ECU) Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Disconnect connector A21 from the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Specified Condition S14-3 (SI0) or A21-29 (SI0) - Body ground 10 kohms or higher S14-3 (SI0) - A21-29 (SI0) Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Power Management Control ECU) NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder. Connect the battery cooling blower assembly connector. Install the rear No. 1 floor board. Connect the power management control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK POWER MANAGEMENT CONTROL ECU (GROUND SHORT CHECK) Remove the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Specified Condition A21-29 (SI0) - L5-5 (E01) 10 kohms or higher A21-29 (SI0) - L6-5 (E02) 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Power Management Control ECU) Install the power management control ECU. NG --> See step 9 OK: Go to next step
5. READ VALUE USING TECHSTREAM Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). NOTE: After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair information because this may cause a malfunction. If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan. NOTE: If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan. Enter the following menus: All Data / VMF Fan Motor Voltage 1. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly. While the cooling fan is operating, compare the value in the data list (VMF Fan Motor Voltage 1) with the voltage value that was actually measured at the battery cooling blower assembly connector. Standard Tester Connection Condition Specified Condition S14-2 (VM0) - S14-4 (GND0) Battery cooling blower is operating Difference between the value in the Data List (VMF Fan Motor Voltage 1) and the actual measurement value is 1 V or less. TEXT IN ILLUSTRATION *a Component with harness connected (Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Battery Cooling Blower Assembly) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. HINT: Compare the values in each air volume mode (1 to 6). If the active test cannot be performed, compare the values only in the current air volume mode. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the rear No. 1 floor board. NG --> See step 7 OK --> See step 6
6. REPLACE BATTERY COOLING BLOWER ASSEMBLY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
7. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
8. GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to «DTC P0AFC-123: Hybrid Battery Pack Sensor Module»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes)
9. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information)

Scheme 510

1. The speed of the battery cooling blower assembly is controlled by the power management control ECU. Battery cooling blower assembly power is supplied when the FCTL terminal of the power management control ECU turns on the battery blower relay. The power management control ECU sends command signals (SI) to the battery cooling blower assembly to get the fan speed corresponding to the HV battery temperature. Information about the voltage applied to the battery cooling blower assembly (VM) is sent to the power management control ECU as a monitor signal using serial communication via the battery smart unit.

Scheme 511

Note. 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. Refer to PRECAUTION .

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1. CHECK FOR DTCS (HV) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan. NOTE: If the Active Test cannot be performed, skip it and proceed to the next step to check fan operates and air is sucked. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan. Select air volume mode 6 in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly. Check that the fan operates and air is sucked into the inlet duct. HINT: The cooling fan may not stop even when turning the cooling fan off in the "Driving the Battery Cooling Fan" Active Test. This is due to HV system control and not a malfunction. OK The fan operates. NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - BATTERY SMART UNIT) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Disconnect connector c1 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Switch Condition Specified Condition S14-2 (VM0) - c1-7 (VM) Power switch off Below 1 ohms Standard Resistance (Check for Short) Tester Connection Switch Condition Specified Condition S14-2 (VM0) or c1-7 (VM) - Body ground Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Battery Smart Unit) Connect the battery cooling blower assembly connector. Connect the battery smart unit connector. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK BATTERY SMART UNIT (VOLTAGE) See step 5 NG --> See step 17 OK --> See step 18
5. CHECK FUSE (BATT FAN) Remove the BATT FAN fuse from the engine room relay block and junction block assembly Measure the resistance of the BATT FAN fuse. Standard Resistance Tester Connection Condition Specified Condition BATT FAN fuse Always Below 1 ohms TEXT IN ILLUSTRATION *1 Engine Room Relay Block and Junction Block Assembly *2 BATT FAN Fuse NG --> See step 14 OK: Go to next step
6. CHECK NO. 2 INTEGRATION RELAY (BATT FAN) Remove the No. 2 integration relay from the engine room relay block and junction block assembly. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1C-1 - 1A-8 Battery voltage is applied across terminals 1A-6 and 1A-7 Below 1 ohms No battery voltage is applied across terminals 1A-6 and 1A-7 10 kohms or higher TEXT IN ILLUSTRATION *1 No. 2 Integration Relay *2 BATT FAN Fuse *3 BATT FAN Relay - - Install the No. 2 integration relay. NG --> See step 16 OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (VOLTAGE) Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan. NOTE: If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan. Enter the following menus: All Data / VMF Fan Motor Voltage 1. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition S14-1 (IG0) - Body ground Battery cooling blower is operating 11 to 14 V TEXT IN ILLUSTRATION *a Component with harness connected (Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Battery Cooling Blower Assembly) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. HINT: Measure the voltage on the wire side of the connector that is part of the battery cooling blower. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the rear No. 1 floor board. NG --> See step 10 OK: Go to next step
8. CHECK BATTERY COOLING BLOWER ASSEMBLY Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Using a service wire, connect terminals 3 (SI0) and 4 (GND0) of the battery cooling blower assembly connector. Specified Condition Tester Connection Switch Condition Specified Condition S14-3 (SI0) - S14-4 (GND0) Power switch on (IG) Fan operates TEXT IN ILLUSTRATION *a Component with harness connected (Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Battery Cooling Blower Assembly) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. HINT: If DTCs are output after the check, clear the DTCs using the Techstream. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the rear No. 1 floor board. NG --> See step 18 OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - POWER MANAGEMENT CONTROL ECU) Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Disconnect connector A21 from the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open) Tester Connection Switch Condition Specified Condition S14-3 (SI0) - A21-29 (SI0) Power switch off Below 1 ohms Standard Resistance (Check for Short) Tester Connection Switch Condition Specified Condition S14-3 (SI0) or A21-29 (SI0) - Body ground Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Power Management Control ECU) NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder. Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S14-3 (SI0) - Body ground Power switch on (IG) Below 1 V NOTE: Turning the power switch on (IG) with the battery cooling blower assembly connector and power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Connect the battery cooling blower assembly connector. Install the rear No. 1 floor board. Connect the power management control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 19
10. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU) Disconnect connector A21 from the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Remove the No. 2 integration relay. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1A-7 - A21-4 (FCTL) Power switch off Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to No. 2 Integration Relay) *b Rear view of wire harness connector (to Power Management Control ECU) NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder. Connect the cable to the negative (-) auxiliary battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition A21-4 (FCTL) - Body ground Power switch off Below 1 V Power switch on (IG) Below 1 V NOTE: If the power switch is turned on (IG) with the connector disconnected, DTCs will be stored. If DTCs are output, clear them using the Techstream. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Disconnect the cable from the negative (-) auxiliary battery terminal. Connect the power management control ECU connector. Install the No. 2 integration relay. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Disconnect connector L5 from the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition L5-5 (E01) - Body ground Power switch off Below 1 ohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management Control ECU) NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder. Connect the power management control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
12. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Disconnect connector L6 from the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition L6-5 (E02) - Body ground Power switch off Below 1 ohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management Control ECU) NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder. Connect the power management control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
13. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY COOLING BLOWER ASSEMBLY) Remove the No. 2 integration relay. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1A-8 - S14-1 (IG0) Power switch off Below 1 ohms TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) *b Front view of wire harness connector (to No. 2 Integration Relay) Install the No. 2 integration relay. Connect the battery cooling blower assembly connector. Install the rear No. 1 floor board. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 19
14. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY COOLING BLOWER ASSEMBLY) Remove the No. 2 integration relay. Refer to «REMOVAL - Step 2»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information) . Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition S14-1 (IG0) - Terminals other than 1A-8 and body ground Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) *b Front view of wire harness connector (to No. 2 Integration Relay) Install the No. 2 integration relay. Connect the battery cooling blower assembly connector. Install the rear No. 1 floor board. NG --> See step 20 OK: Go to next step
15. CHECK BATTERY COOLING BLOWER ASSEMBLY Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition S14-1 (IG0) - S14-4 (GND0) and body ground Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Battery Cooling Blower Assembly) Connect the battery cooling blower assembly connector. Install the rear No. 1 floor board. NG --> See step 21 OK --> REPLACE FUSE (BATT FAN)
16. REPLACE NO. 2 INTEGRATION RELAY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/testing-diagnostics/#engine-control-system-service-information)
17. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
18. REPLACE BATTERY COOLING BLOWER ASSEMBLY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
19. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information)
20. REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> REPLACE FUSE (BATT FAN)
21. REPLACE BATTERY COOLING BLOWER ASSEMBLY Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) NEXT --> REPLACE FUSE (BATT FAN)

Refer to the circuit description for DTC P0A84-123. Refer to DESCRIPTION .

Scheme 523

Note. 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. Refer to PRECAUTION .

Scheme 524

Scheme 525

Scheme 526

Scheme 527

Scheme 528

1. CHECK FOR DTCS (HV) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK HARNESS AND CONNECTOR (VOLTAGE) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan. NOTE: If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition S14-2 (VM0) - S14-4 (GND0) Battery cooling blower is operating Below 5 V TEXT IN ILLUSTRATION *a Component with harness connected (Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Battery Cooling Blower Assembly) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. HINT: Measure the voltage on the wire side of the connector that is part of the battery cooling blower. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the rear No. 1 floor board. NG --> See step 5 OK: Go to next step
3. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR AND INLET AIR TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connectors c1 and z17 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition z17-6 (TBO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-12 (GBO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-5 (TB1) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-11 (GB1) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-4 (TB2) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-10 (GB2) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-1 (TCO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-7 (GCO) - c1-4 (IGCT) Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) Connect the battery smart unit connectors. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 4 OK --> See step 8
4. CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the upper hybrid battery cover sub-assembly. Refer to «REMOVAL - Step 28»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Check the wire harness and connectors of the battery temperature sensor and inlet air temperature sensor for abnormalities by sight and touch. Specified Condition There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses. Install the upper hybrid battery cover sub-assembly. NG --> REPAIR HARNESS OR CONNECTOR OK --> See step 7
5. CHECK HARNESS AND CONNECTOR (VOLTAGE) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the rear No. 1 floor board. Refer to «REMOVAL - Step 8»(/toyota/prius-v/i-2011-2014/remont/exteriorinterior-trim/#interior-panels-trim-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S14-2 (VM0) - S14-4 (GND0) Power switch on (IG) Below 5 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) NOTE: Turning the power switch on (IG) with the battery cooling blower assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection. Disconnect the cable from the negative (-) auxiliary battery terminal. Connect the battery cooling blower assembly connector. Install the rear No. 1 floor board. NG --> See step 6 OK --> See step 9
6. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - BATTERY SMART UNIT) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connector S14 from the battery cooling blower assembly. Disconnect connector c1 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition S14-2 (VM0) and c1-7 (VM) - Other terminal Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Battery Cooling Blower Assembly) *b Rear view of wire harness connector (to Battery Smart Unit) Connect the battery smart unit connector. Connect the battery cooling blower assembly connector. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
7. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
8. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
9. REPLACE BATTERY COOLING BLOWER ASSEMBLY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

Scheme 529

Note. 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. Refer to PRECAUTION .

Scheme 530

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK SERVICE PLUG GRIP Turn the power switch off. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Standard Resistance Service plug grip Below 1 ohms NG --> See step 4 OK --> See step 3
3. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
4. REPLACE SERVICE PLUG GRIP. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

Scheme 531

1. The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery smart unit uses the battery temperature sensors to detect the HV battery temperature, and sends the detected value to the power management control ECU. Based on the results of this detection, the power management control ECU controls the blower fan. (The blower fan starts when HV battery temperature rises above a predetermined level.) Temperature Sensor Identification Cross Reference Table DTC Title Sensor Battery Temperature Sensor Techstream Display A 0 1 B 1 2 C 2 3 HINT: For example, sensor A in the DTC title is battery temperature sensor (No. 0). This sensor is displayed as Temp of Batt TB1 in the Data List.

If the battery smart unit detects a malfunction in the HV battery temperature sensor, the power management control ECU (HV CPU) illuminates the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Check that the temperature of each temperature sensor is -10 °C (14 °F) or more. HINT: If any of temperature sensor values are less than -10 °C (14 °F), raise the temperature to -10 °C (14 °F) or more and then perform the next step.
7. Turn the power switch on (READY) and wait for 30 seconds or more.
8. Drive the vehicle on urban roads at a speed of 40 km/h (25 mph) or more for a total of at least 10 minutes. [A] NOTE: Avoid abrupt acceleration or braking.
9. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
10. Check that permanent DTCs are cleared.
11. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 532

Note. 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. Refer to PRECAUTION .

Scheme 533

Scheme 534

Scheme 535

Scheme 536

1. CHECK DTC OUTPUT (HYBRID CONTROL). Refer to «PROCEDURE - Step 1»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-control-system-diagnostic-codes-p0aa4-232-u0424-537-circuit-tests) B --> GO TO DTC CHART (HYBRID CONTROL SYSTEM) A: Go to next step
2. CHECK INSTALLATION OF BATTERY TEMPERATURE SENSOR WARNING: Be sure to wear insulated gloves and protective goggles. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the upper hybrid battery cover sub-assembly. Refer to «REMOVAL - Step 28»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Visually check the installation condition of the relevant battery temperature sensor. Standard Condition Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely. Result Result Proceed to Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely A Claws are damaged. B Any of battery temperature sensors are not installed correctly, but claws are not damaged. C NOTE: Do not use a stick or similar object to push on the sensors when inspecting them. Doing so may result in damage to the sensors. TEXT IN ILLUSTRATION *1 Battery Temperature Sensor 0 *2 Battery Temperature Sensor 1 *3 Battery Temperature Sensor 2 - - Install the upper hybrid battery cover sub-assembly. B --> See step 6 C --> INSTALL PARTS CORRECTLY A: Go to next step
3. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connectors z17 and c1 from the battery smart unit. Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2). TESTER CONNECTION Tester Connection Battery Temperature Sensor No. z17-6 (TBO) - z17-12 (GBO) 0 z17-5 (TB1) - z17-11 (GB1) 1 z17-4 (TB2) - z17-10 (GB2) 2 Standard Resistance Thermistor Temperature Switch Condition Specified Condition 0 °C (32 °F) Power switch off 26.7 to 27.8 kohms 25 °C (77 °F) Power switch off 9.9 to 10.1 kohms 40 °C (104 °F) Power switch off 5.73 to 5.92 kohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Standard Resistance z17-6 (TBO) - c1-4 (IGCT) Power switch off 10 kohms or more z17-6 (TBO) - c1-8 (GND) Power switch off 10 kohms or more z17-12 (GBO) - c1-4 (IGCT) Power switch off 10 kohms or more z17-12 (GBO) - c1-8 (GND) Power switch off 10 kohms or more z17-5 (TB1) - c1-4 (IGCT) Power switch off 10 kohms or more z17-5 (TB1) - c1-8 (GND) Power switch off 10 kohms or more z17-11 (GB1) - c1-4 (IGCT) Power switch off 10 kohms or more z17-11 (GB1) - c1-8 (GND) Power switch off 10 kohms or more z17-4 (TB2) - c1-4 (IGCT) Power switch off 10 kohms or more z17-4 (TB2) - c1-8 (GND) Power switch off 10 kohms or more z17-10 (GB2) - c1-4 (IGCT) Power switch off 10 kohms or more z17-10 (GB2) - c1-8 (GND) Power switch off 10 kohms or more z17-1 (TCO) - c1-4 (IGCT) Power switch off 10 kohms or more z17-1 (TCO) - c1-8 (GND) Power switch off 10 kohms or more z17-7 (GCO) - c1-4 (IGCT) Power switch off 10 kohms or more z17-7 (GCO) - c1-8 (GND) Power switch off 10 kohms or more TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) Connect the battery smart unit connectors. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 4 OK --> See step 5
4. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves and protective goggles. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the upper hybrid battery cover sub-assembly. Refer to «REMOVAL - Step 28»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Check the wire harness and connectors of the battery temperature sensor for abnormalities by sight and touch. Specified Condition There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses. Install the upper hybrid battery cover sub-assembly. NG --> REPAIR HARNESS OR CONNECTOR OK --> See step 6
5. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
6. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

1. Refer to the description for DTC P0A9C-123. Refer to «DESCRIPTION»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes) .

HINT

After confirming that a DTC is output, use the Techstream to check "Temp of BATT TB 1 to 3" in the hybrid vehicle control system ECU data list.

If the temperature indicated by the battery temperature sensor is lower than the standard level (open), or is higher than the standard level (short), the battery smart unit interprets this as a sensor malfunction. If the battery smart unit detects that HV battery temperature is out of the normal range or its value is abnormal, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform the universal trip.
7. Enter the following menus: Powertrain / HV / Trouble Codes.
8. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Refer to the wiring diagram for DTC P0A9C-123. Refer to WIRING DIAGRAM .

Note. 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. Refer to PRECAUTION .

Scheme 537

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Data List / Temp of Batt TB 1 to 3. HINT: Compare the temperature of the 3 battery temperature sensors to determine the sensor with the malfunction (Temp of Batt TB1 to TB3). NEXT: Go to next step
3. CHECK CONNECTOR CONNECTION CONDITION WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Check the connections of the z17 connector of the battery smart unit. OK The connectors are connected securely and there are no contact problems. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> CONNECT SECURELY OK: Go to next step
4. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR) See step 3 NG --> See step 5 OK --> See step 6
5. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
6. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
7. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

1. The inlet air temperature sensor (battery) is mounted on the HV battery. The resistance of the sensor varies in accordance with changes in the intake air temperature. The characteristics of the inlet air temperature sensor are the same as those of the battery temperature sensor. Refer to «DESCRIPTION»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes) . The battery smart unit uses signals from the inlet air temperature sensor to control the air volume of the battery cooling blower assembly.

HINT

After confirming that DTC P0AAE-123 or P0AAF-123 is output, use the Techstream to check "Inhaling Air Temp" in the HV ECU data list.

Refer to the wiring diagram for DTC P0A9C-123. Refer to WIRING DIAGRAM .

Note. 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. Refer to PRECAUTION .

Scheme 538

1. CHECK FOR DTCS (HV) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK INSTALLATION OF INLET AIR TEMPERATURE SENSOR WARNING: Be sure to wear insulated gloves and protective goggles. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Check installation of inlet air temperature sensor. Check the connections of the z17 connector of the battery smart unit. OK The connectors are connected securely and there are no contact problems. Result Result Proceed to NG B OK Go to next step Visually check the installation condition of the inlet air temperature sensor. OK The inlet air temperature sensor is installed in the correct location and its claws are engaged securely. Result Result Proceed to The inlet air temperature sensor is installed in the correct location and its claws are engaged securely A Claws are damaged. C Inlet air temperature sensor is not installed correctly, but claws are not damaged. D Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. B --> CONNECT SECURELY C --> See step 5 D --> INSTALL PARTS CORRECTLY A: Go to next step
3. CHECK HV BATTERY (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connectors c1 and z17 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition z17-1 (TCO) - z17-7 (GCO) 0 °C (32 °F) 26.7 to 27.8 kohms 25 °C (77 °F) 9.9 to 10.1 kohms 40 °C (104 °F) 5.73 to 5.92 kohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition z17-1 (TCO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-1 (TCO) - c1-8 (GND) Power switch off 10 kohms or higher z17-7 (GCO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-7 (GCO) - c1-8 (GND) Power switch off 10 kohms or higher Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition z17-6 (TBO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-6 (TBO) - c1-8 (GND) Power switch off 10 kohms or higher z17-12 (GBO) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-12 (GBO) - c1-8 (GND) Power switch off 10 kohms or higher z17-5 (TB1) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-5 (TB1) - c1-8 (GND) Power switch off 10 kohms or higher z17-11 (GB1) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-11 (GB1) - c1-8 (GND) Power switch off 10 kohms or higher z17-4 (TB2) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-4 (TB2) - c1-8 (GND) Power switch off 10 kohms or higher z17-10 (GB2) - c1-4 (IGCT) Power switch off 10 kohms or higher z17-10 (GB2) - c1-8 (GND) Power switch off 10 kohms or higher Connect the battery smart unit connectors. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 4 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR) See step 4 NG --> REPAIR HARNESS OR CONNECTOR OK --> See step 5
5. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
6. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

Scheme 539

1. The battery current sensor, which is mounted on the positive cable side of the HV battery, detects the amperage that flows into the HV battery. The battery smart unit receives a voltage, which varies between 0 and 5 V in proportion to the amperage, at its IB terminal from the battery current sensor. An output voltage of the battery current sensor below 2.5 V indicates that the HV battery is being discharged, and above 2.5 V indicates that the HV battery is being charged. The power management control ECU determines the charging and discharging amperage of the HV battery based on the signals that are input to its IB terminal from the battery smart unit, and calculates the SOC (state of charge) of the HV battery through the accumulated amperage.

If the battery smart unit detects a malfunction in the battery current sensor, the power management control ECU (HV CPU) illuminates the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform the universal trip.
7. Enter the following menus: Powertrain / HV / Trouble Codes.
8. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 540

Note. 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. Refer to PRECAUTION .

Scheme 541

Scheme 542

Scheme 543

Scheme 544

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY - BATTERY SMART UNIT) NOTE: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect only the c1 connector of the battery smart unit. Disconnect the c4 battery current sensor connector from the hybrid battery junction block assembly. Measure the resistance according to the value(s) in the tables below. Standard Resistance (Check for Open) Tester Connection Switch Condition Specified Condition c1-1 (IB) - c4-3 (IB) Power switch off Below 1 ohms c1-6 (GIB) - c4-2 (GIB) Power switch off Below 1 ohms c1-5 (VIB) - c4-1 (VIB) Power switch off Below 1 ohms Standard Resistance (Check for Short) Tester Connection Switch Condition Specified Condition c1-1 (IB) or c4-3 (IB) - Body ground and other terminals Power switch off 10 kohms or higher c1-6 (GIB) or c4-2 (GIB) - Body ground and other terminals Power switch off 10 kohms or higher c1-5 (VIB) or c4-1 (VIB) - Body ground and other terminals Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) *b Front view of wire harness connector (to Hybrid Battery Junction Block Assembly) Connect the battery smart unit connector. Connect the battery current sensor connector to the hybrid battery junction block assembly. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK BATTERY SMART UNIT (VIB VOLTAGE) NOTE: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c1-5 (VIB) - c1-6 (GIB) Power switch on (IG) 4.6 to 5.4 V TEXT IN ILLUSTRATION *a Component with harness connected (Battery Smart Unit) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 6 OK: Go to next step
4. CHECK BATTERY SMART UNIT WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c1-1 (IB) - c1-6 (GIB) Power switch on (IG) 2.46 to 2.54 V TEXT IN ILLUSTRATION *a Component with harness connected (Battery Smart Unit) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 5 OK --> See step 6
5. REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
6. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

Refer to the Description for DTC P0ABF-123. Refer to DESCRIPTION .

If the battery smart unit detects a malfunction in the battery current sensor, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (IG), wait for 10 seconds or more and then turn the power switch off.
6. Turn the power switch on (READY) and turn the Techstream on.
7. Perform a universal trip.
8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
9. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. 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. Refer to PRECAUTION .

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) NEXT: Go to next step
3. CLEAR DTC (HYBRID CONTROL) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Clear the DTCs and freeze frame data. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Perform a road test to charge and discharge the HV battery. HINT: 2 trip detection logic is used. After the first road test, turn the power switch off and perform a road test again. Disconnect the Techstream from the DLC3. NEXT: Go to next step
4. RECONFIRM DTC OUTPUT (HYBRID CONTROL) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Read output DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Result Result Proceed to DTCs P0AC0-123 is not output. A DTCs P0AC0-123 is output. B Disconnect the Techstream from the DLC3. B --> See step 5 A --> RECOVERY TO NORMAL
5. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

1. If the battery smart unit detects an internal malfunction, it sends an error signal to the power management control ECU. When the power management control ECU receives the error signal from the battery smart unit, the ECU warns the driver and performs fail-safe control.

If the battery smart unit detects an internal malfunction in the unit itself, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform the universal trip.
7. Enter the following menus: Powertrain / HV / Trouble Codes.
8. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 545

Note. 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. Refer to PRECAUTION .

HINT

After repairing, restart the system (turn the power switch on (READY)) and recheck for DTCs. Refer to DTC CHECK / CLEAR .

Scheme 546

Scheme 547

1. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c1-4 (IGCT) - c1-8 (GND) Power switch on (IG) 11 to 14 V TEXT IN ILLUSTRATION *a Component with harness connected (Battery Smart Unit) NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 2 OK --> See step 3
2. CHECK HARNESS AND CONNECTOR (GND - BODY GROUND) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition c1-8 (GND) - Body ground Power switch off Below 1 ohms TEXT IN ILLUSTRATION *a Component with harness connected (Battery Smart Unit) Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGCT NO. 2 FUSE - BATTERY SMART UNIT)
3. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

1. Refer to the description for DTC P0A80-123. Refer to «DESCRIPTION»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes) .

HINT

1. Values smaller than 2.0 V may not be shown in the Data List because a fail-safe value is substituted.
2. Hybrid battery voltage sensor in the DTC titles refers to the battery smart unit.

If the battery smart unit detects voltage drop in a battery module, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform the universal trip.
7. Enter the following menus: Powertrain / HV / Trouble Codes.
8. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Note. 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. Refer to PRECAUTION .

Scheme 548

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK CONNECTOR CONNECTION CONDITION WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Check the connections of the j1 connector of the battery smart unit. OK The connectors are connected securely and there are no contact problems. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> CONNECT SECURELY OK: Go to next step
3. REPLACE BATTERY SMART UNIT Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) NEXT: Go to next step
4. CLEAR DTC (HV) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Clear the DTCs and freeze frame data. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Perform a road test to charge and discharge the HV battery. Disconnect the Techstream from the DLC3. NEXT: Go to next step
5. RECONFIRM DTC OUTPUT (HV) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Read output DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Result Result Proceed to Battery temperature sensor DTCs for this diagnostic procedure are not output A Battery temperature sensor DTCs for this diagnostic procedure are output B NOTE: Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection. Disconnect the Techstream from the DLC3. B --> See step 6 A --> RETURN TO NORMAL OPERATION
6. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

1. Refer to the Description for DTC P0A9C-123. Refer to «DESCRIPTION»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostic-codes) .

HINT

P3011-123 and P3024-123 will not be set unless the vehicle is driven for approximately 10 minutes after clearing the DTCs.

If there is an abnormal internal resistance or electromotive voltage in the battery blocks, the battery smart unit determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform a universal trip.
7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
8. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

1. CHECK DTC OUTPUT (HYBRID CONTROL) See step 1 B --> GO TO DTC CHART (HYBRID BATTERY SYSTEM) A: Go to next step
2. CHECK BATTERY SMART UNIT See step 2 B --> See step 5 A --> See step 4
3. REPLACE HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
4. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
5. CHECK DTC OUTPUT (HYBRID CONTROL) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. RESULT Result Proceed to DTC P3015-123 is output. A DTC P3015-123 is not output. B Turn the power switch off. B --> See step 3 A --> See step 6
6. REPLACE SERVICE PLUG GRIP AND HV BATTERY. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)

The battery smart unit detects the HV battery conditions (voltage, current, and temperature) and battery cooling fan voltage, and sends the detected signals to the power management control ECU via serial communication.

If the power management control ECU (HV CPU) detects problem with serial communication with the battery smart unit, it will illuminate the MIL and set a DTC.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform a universal trip.
7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
8. Check that permanent DTCs are cleared. HINT: If a permanent DTC is output, the system is malfunctioning. If no permanent DTC is output, the system is normal.

Scheme 549

Note. 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. Refer to PRECAUTION .

Scheme 550

Scheme 551

Scheme 552

Scheme 553

Scheme 554

1. CHECK DTC OUTPUT (HYBRID CONTROL) Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Check for DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction) . Result Result Proceed to Only U029A-123 is output. A DTCs other than U029A-123 are also output. B Disconnect the Techstream from the DLC3. B --> See step 6 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY SMART UNIT) WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Disconnect connector L5 from the power management control ECU. Refer to «REMOVAL»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information) . Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connector c1 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition L5-32 (BTH+) - c1-2 (BTH+) Power switch off Below 1 ohms L5-33 (BTH-) - c1-3 (BTH-) Power switch off Below 1 ohms c1-2 (BTH+) - c1-8 (GND) and Body ground Power switch off 10 kohms or higher c1-3 (BTH-) - c1-8 (GND) and Body ground Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management Control ECU) *b Rear view of wire harness connector (to Battery Smart Unit) Remove the IGCT No. 2 fuse and AM2 fuse from the engine room relay block and junction block assembly. TEXT IN ILLUSTRATION *1 Engine Room Relay Block and Junction Block Assembly *2 AM2 Fuse *3 IGCT No. 2 Fuse Disconnect all connectors from the power management control ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition L5-32 (BTH+) - L6-7 (AM21) Power switch off 10 kohms or higher L5-32 (BTH+) - L5-1 (AM22) Power switch off 10 kohms or higher L5-32 (BTH+) - A21-2 (+B2) Power switch off 10 kohms or higher L5-32 (BTH+) - A22-5 (+B1) Power switch off 10 kohms or higher L5-32 (BTH+) - A22-6 (MREL) Power switch off 10 kohms or higher L5-32 (BTH+) - A22-1 (IG2) Power switch off 10 kohms or higher L5-32 (BTH+) - L6-1 (ACCD) Power switch off 10 kohms or higher L5-32 (BTH+) L6-2 (IG1D) Power switch off 10 kohms or higher L5-32 (BTH+) - A22-2 (IG2D) Power switch off 10 kohms or higher L5-32 (BTH+) - A21-4 (FCTL) Power switch off 10 kohms or higher L5-32 (BTH+) - L5-14 (SPDI) Power switch off 10 kohms or higher L5-32 (BTH+) - A21-16 (GI) Power switch off 10 kohms or higher L5-33 (BTH-) - L6-7 (AM21) Power switch off 10 kohms or higher L5-33 (BTH-) - L5-1 (AM22) Power switch off 10 kohms or higher L5-33 (BTH-) - A21-2 (+B2) Power switch off 10 kohms or higher L5-33 (BTH-) - A22-5 (+B1) Power switch off 10 kohms or higher L5-33 (BTH-) - A22-6 (MREL) Power switch off 10 kohms or higher L5-33 (BTH-) - A22-1 (IG2) Power switch off 10 kohms or higher L5-33 (BTH-) - L6-1 (ACCD) Power switch off 10 kohms or higher L5-33 (BTH-) - L6-2 (IG1D) Power switch off 10 kohms or higher L5-33 (BTH-) - A22-2 (IG2D) Power switch off 10 kohms or higher L5-33 (BTH-) - L5-14 (SPDI) Power switch off 10 kohms or higher L5-33 (BTH-) - A21-4 (FCTL) Power switch off 10 kohms or higher L5-33 (BTH-) - A21-16 (GI) Power switch off 10 kohms or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Power Management Control ECU) - - NOTE: When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder. Connect the battery smart unit connector. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Connect the power management control ECU connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK POWER MANAGEMENT CONTROL ECU WARNING: Be sure to wear insulated gloves. Check that the service plug grip is not installed. NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to «REMOVAL - Step 25»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information) . Disconnect connector c1 from the battery smart unit. Connect the cable to the negative (-) auxiliary battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c1-2 (BTH+) - c1-8 (GND) Power switch on (IG) 2.3 to 2.7 V c1-3 (BTH-) - c1-8 (GND) Power switch on (IG) 2.3 to 2.7 V TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) NOTE: Turning the power switch on (IG) with the battery smart unit connector and power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection. Turn the power switch off. Disconnect the cable from the negative (-) auxiliary battery terminal. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition c1-2 (BTH+) - c1-3 (BTH-) Power switch off 4.4 to 5.4 kohms TEXT IN ILLUSTRATION *a Rear view of wire harness connector (to Battery Smart Unit) HINT: Resistance becomes 2.0 kohms or less when there is a short circuit in the power management control ECU. Connect the battery smart unit connector. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly. NG --> See step 5 OK --> See step 4
4. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-control-system-service-information)
5. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «COMPONENTS»(/toyota/prius-v/i-2011-2014/remont/body-electrical/#power-distribution-service-information)
6. GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/engine-control-systems/#hybrid-battery-system-diagnostics-introduction__diagnostic-trouble-code-chart)

See also:
• DTC CHECK / CLEAR
• COMPONENTS
• PRECAUTION
• REMOVAL
• REMOVAL - Step 8
• REMOVAL
• PROCEDURE - Step 1
• DIAGNOSTIC TROUBLE CODE CHART
• DTC P0AFC-123: Hybrid Battery Pack Sensor Module