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Hybrid Battery System (Diagnostic Codes): Diagnosis Lexus GS III рестайлинг

Engine Control Systems 25 illustrations ~4414 words

INSPECTION PROCEDURE

WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

  1. Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
  2. After completing repairs, restart the system (turn the power switch on (READY)) and recheck for DTCs. . Refer to «DTC CHECK / CLEAR»(ref-387121-S30534528852011022400000)

Scheme 775

Scheme 775: PROCEDURE
Scheme 775: PROCEDURE

Scheme 776

Scheme 776
Scheme 776

Scheme 777

Scheme 777
Scheme 777
  1. CHECK AUXILIARY BATTERY Measure the voltage between the terminals of the auxiliary battery. Standard voltage 11 to 14 V NG --> CHARGE OR REPLACE AUXILIARY BATTERY OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. . Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment trim cover front. . Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. . Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. . Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Connect the auxiliary battery positive terminal cable of the frame wire. . Refer to «INSTALLATION»(ref-387094-S17558850652011022400000) Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition IGCT (N2-1) - GND (N2-5) 8.6 V or higher OK --> See step 5 NG: Go to next step
  3. CHECK FUSE (IGCT NO. 3 FUSE) Remove the IGCT NO. 3 fuse from the engine room R/B No. 1. Measure the resistance according to the value(s) in the table below. Standard resistance Below 1 ohms NG --> REPLACE FUSE (IGCT NO.3 FUSE) OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTEGRATION RELAY (IGCT RELAY)) WARNING: Be sure to wear insulated gloves. Install the IGCT NO. 3 fuse to the engine room R/B No. 1. Remove the integration relay from the engine room R/B No. 1. Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition IGCT (N2-1) - 1V-8 Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> CHECK AND REPAIR POWER SOURCE CIRCUIT
  5. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)

Scheme 778

Scheme 778: DESCRIPTION
Scheme 778: DESCRIPTION
  1. The battery smart unit and hybrid vehicle control ECU calculate the SOC (state of charge) of the HV battery based on the accumulated amperage in the HV battery. The battery smart unit sends the condition of the HV battery to the hybrid vehicle control ECU. Then the hybrid vehicle control ECU calculates the SOC based on this information and controls HV battery charge and discharge according to the driving conditions. 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 cannot be set unless the vehicle is driven for approximately 10 minutes after clearing the DTCs. (For 2 trip detection, turn the power switch off and perform a road test again after the first road test.)
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 779

Scheme 779: PROCEDURE
Scheme 779: PROCEDURE

Scheme 780

Scheme 780
Scheme 780

Scheme 781

Scheme 781
Scheme 781

Scheme 782

Scheme 782
Scheme 782
  1. CHECK DTC OUTPUT (DTC 0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. CHECK HARNESS AND CONNECTOR (VOLTAGE) Remove the luggage compartment front trim cover. . Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the No. 6 HV battery intake duct . Refer to «COMPONENTS»(ref-387094-S20340730302011022400000) . Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan. Select each air volume mode (1 to 6) in 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 while the cooling fan is operating. Standard voltage Tester Connection Specified Condition VM (N5-2) - GND (N5-4) Below 5 V OK --> See step 6 NG: Go to next step
  3. CHECK HARNESS AND CONNECTOR (VOLTAGE) Turn the power switch on (IG). Disconnect connector N5 from the battery cooling blower assembly. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition VM (N5-2) - GND (N5-4) Below 5 V HINT: Turning the power switch on (IG) with the battery cooling blower assembly connector disconnected may cause DTC P0A84-123 (Hybrid Battery Pack Cooling Fan 1) to be set. Make sure to clear this code using the Techstream. NG --> See step 4 OK --> See step 5
  4. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - BATTERY SMART UNIT) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment front trim cover. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition VM (N5-2) or VM (N2-8) - Other terminal 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
  5. REPLACE BATTERY COOLING BLOWER ASSEMBLY. Refer to «COMPONENTS»(ref-387094-S05930747352011022400000)
  6. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR AND INLET AIR TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Disconnect connector z13 from the battery smart unit. Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TB0 (z13-7) - IGCT (N2-1) 10 kohms or higher GB0 (z13-17) - IGCT (N2-1) 10 kohms or higher TB1 (z13-6) - IGCT (N2-1) 10 kohms or higher GB1 (z13-16) - IGCT (N2-1) 10 kohms or higher TB2 (z13-5) - IGCT (N2-1) 10 kohms or higher GB2 (z13-15) - IGCT (N2-1) 10 kohms or higher TB3 (z13-4) - IGCT (N2-1) 10 kohms or higher GB3 (z13-14) - IGCT (N2-1) 10 kohms or higher TC0 (z13-1) - IGCT (N2-1) 10 kohms or higher GC0 (z13-11) - IGCT (N2-1) 10 kohms or higher NG --> See step 8 OK --> See step 7
  7. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)
  8. REPLACE HV BATTERY. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 783

Scheme 783: PROCEDURE
Scheme 783: PROCEDURE

Scheme 784

Scheme 784
Scheme 784
  1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. INSPECT SERVICE PLUG GRIP WARNING: Be sure to wear insulated gloves. Turn the power switch off and remove the service plug grip. NOTE: 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. Measure the resistance between the terminals of the service plug grip. Standard resistance Below 1 ohms OK --> See step 4 NG: Go to next step
  3. INSPECT ELECTRIC VEHICLE FUSE (HIGH VOLTAGE FUSE) Remove the electric vehicle fuse. HINT: The electric vehicle fuse is located in the service plug grip. Measure the resistance according to the value(s) in the table below. Standard resistance Below 1 ohms NG --> See step 6 OK --> See step 5
  4. REPLACE HV BATTERY. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)
  5. REPLACE SERVICE PLUG GRIP. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)
  6. REPLACE ELECTRIC VEHICLE FUSE. Refer to «COMPONENTS»(ref-387094-S16911394682011022400000)
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 785

Scheme 785: PROCEDURE
Scheme 785: PROCEDURE

Scheme 786

Scheme 786
Scheme 786

Scheme 787

Scheme 787
Scheme 787

Scheme 788

Scheme 788
Scheme 788
  1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. CHECK BATTERY TEMPERATURE SENSOR (BATTERY TEMPERATURE SENSOR 0 TO 3) WARNING: Be sure to wear insulated gloves. Remove the HV battery assembly. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Visually check the installation of the battery temperature sensors (0 to 3) through the exhaust duct installation hole. OK The battery temperature sensors (0 to 3) are securely installed. NOTE: Do not poke the battery temperature sensors with a stick or other objects when checking. Doing so may damage the sensors. NG --> See step 5 OK: Go to next step
  3. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. For the malfunctioning battery temperature sensor(s), measure the resistance according to the value(s) in the table below. Thermistor No. Tester Connection Thermistor No. TB0 (z13-7) - GB0 (z13-17) 0 TB1 (z13-6) - GB1 (z13-16) 1 TB2 (z13-5) - GB2 (z13-15) 2 TB3 (z13-4) - GB3 (z13-14) 3 Standard resistance Thermistor Temperature Reference Value 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 Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TB0 (z13-7) - IGCT (N2-1) 10 kohms or higher TB0 (z13-7) - GND (N2-5) 10 kohms or higher GB0 (z13-17) - IGCT (N2-1) 10 kohms or higher GB0 (z13-17) - GND (N2-5) 10 kohms or higher TB1 (z13-6) - IGCT (N2-1) 10 kohms or higher TB1 (z13-6) - GND (N2-5) 10 kohms or higher GB1 (z13-16) - IGCT (N2-1) 10 kohms or higher GB1 (z13-16) - GND (N2-5) 10 kohms or higher TB2 (z13-5) - IGCT (N2-1) 10 kohms or higher TB2 (z13-5) - GND (N2-5) 10 kohms or higher GB2 (z13-15) - IGCT (N2-1) 10 kohms or higher GB2 (z13-15) - GND (N2-5) 10 kohms or higher TB3 (z13-4) - IGCT (N2-1) 10 kohms or higher TB3 (z13-4) - GND (N2-5) 10 kohms or higher GB3 (z13-14) - IGCT (N2-1) 10 kohms or higher GB3 (z13-14) - GND (N2-5) 10 kohms or higher Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TC0 (z13-1) - IGCT (N2-1) 10 kohms or higher TC0 (z13-1) - GND (N2-5) 10 kohms or higher GC0 (z13-11) - IGCT (N2-1) 10 kohms or higher GC0 (z13-11) - GND (N2-5) 10 kohms or higher NG --> See step 5 OK --> See step 4
  4. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)
  5. REPLACE HV BATTERY. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)

Scheme 789

Scheme 789: DESCRIPTION
Scheme 789: DESCRIPTION
  1. The battery temperature sensors are provided at 4 locations on the bottom 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 values to the hybrid vehicle control ECU. Based on these results, the hybrid vehicle control ECU controls the blower fan. (The blower fan starts when the HV battery temperature rises above a predetermined level.)
DTC No.DTC Detection ConditionTrouble Area
P0A9D-123 P0A9E-123When the temperature indicated by the battery temperature sensor is lower than a predetermined limit (open circuit) or is higher than a predetermined limit (short circuit) (1 trip detection)HV battery (Battery temperature sensor) HV battery (Intake air temperature sensor) Battery smart unit

HINT

After confirming that a DTC is output, use the Techstream to check "Temp of Batt 1 to 4" in the HV ECU data list.

Displayed TemperatureMalfunction
45°C (-49°F) or lessOpen or +B short circuit
95°C (203°F) or higherGND short
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 790

Scheme 790: PROCEDURE
Scheme 790: PROCEDURE
  1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. READ VALUE USING TECHSTREAM Select the following menu items: Powertrain / Hybrid Control / Data List / Temp of Batt 1 to 4. Read the data list. HINT: Determine which battery temperature sensor (0 to 3) is malfunctioning. Sensor 1, as referred to on the Techstream, refers to sensor 0 (TB0) on the vehicle. The other battery temperature sensors are numbered in the same manner. NEXT: Go to next step
  3. CHECK CONNECTOR CONNECTION CONDITION (BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment trim cover front. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Check the connection of connector z13 of the battery smart unit. OK The connector is connected securely and there are no contact problems. NG --> CONNECT SECURELY OK: Go to next step
  4. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Disconnect connector z13 from the battery smart unit. For the malfunctioning battery temperature sensor(s) , measure the resistance according to the value(s) in the table below. Thermistor No. Tester Connection Thermistor No. TB0 (z13-7) - GB0 (z13-17) 0 TB1 (z13-6) - GB1 (z13-16) 1 TB2 (z13-5) - GB2 (z13-15) 2 TB3 (z13-4) - GB3 (z13-14) 3 Standard resistance Thermistor Temperature Specified Condition 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 Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TB0 (z13-7) - IGCT (N2-1) 10 kohms or higher TB0 (z13-7) - GND (N2-5) 10 kohms or higher GB0 (z13-17) - IGCT (N2-1) 10 kohms or higher GB0 (z13-17) - GND (N2-5) 10 kohms or higher TB1 (z13-6) - IGCT (N2-1) 10 kohms or higher TB1 (z13-6) - GND (N2-5) 10 kohms or higher GB1 (z13-16) - IGCT (N2-1) 10 kohms or higher GB1 (z13-16) - GND (N2-5) 10 kohms or higher TB2 (z13-5) - IGCT (N2-1) 10 kohms or higher TB2 (z13-5) - GND (N2-5) 10 kohms or higher GB2 (z13-15) - IGCT (N2-1) 10 kohms or higher GB2 (z13-15) - GND (N2-5) 10 kohms or higher TB3 (z13-4) - IGCT (N2-1) 10 kohms or higher TB3 (z13-4) - GND (N2-5) 10 kohms or higher GB3 (z13-14) - IGCT (N2-1) 10 kohms or higher GB3 (z13-14) - GND (N2-5) 10 kohms or higher Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TC0 (z13-1) - IGCT (N2-1) 10 kohms or higher TC0 (z13-1) - GND (N2-5) 10 kohms or higher GC0 (z13-11) - IGCT (N2-1) 10 kohms or higher GC0 (z13-11) - GND (N2-5) 10 kohms or higher NG --> See step 6 OK --> See step 5
  5. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)
  6. REPLACE HV BATTERY. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 791

Scheme 791
Scheme 791

Scheme 792

Scheme 792
Scheme 792
  1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. CHECK CONNECTOR CONNECTION CONDITION (INTAKE AIR TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment trim cover front. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Check the connection of connector z13 of the battery smart unit. OK The connector is connected securely and there are no contact problems. HINT: The intake air temperature sensor is not available separately. If it requires replacement, replace the HV battery. NG --> CONNECT SECURELY OK: Go to next step
  3. CHECK HV BATTERY (INTAKE AIR TEMPERATURE SENSOR) WARNING: Be sure to wear insulated gloves. Disconnect connector z13 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition TC0 (z13-1) - GC0 (z13-11) 0°C (32°F) 26.7 to 27.8 kohms TC0 (z13-1) - GC0 (z13-11) 25°C (77°F) 9.9 to 10.1 kohms TC0 (z13-1) - GC0 (z13-11) 40°C (104°F) 5.73 to 5.92 kohms Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TC0 (z13-1) - IGCT (N2-1) 10 kohms or higher TC0 (z13-1) - GND (N2-5) 10 kohms or higher GC0 (z13-11) - IGCT (N2-1) 10 kohms or higher GC0 (z13-11) - GND (N2-5) 10 kohms or higher Measure the resistance according to the value(s) in the table below. Standard resistance (Check for short) Tester Connection Specified Condition TB0 (z13-7) - IGCT (N2-1) 10 kohms or higher TB0 (z13-7) - GND (N2-5) 10 kohms or higher GB0 (z13-17) - IGCT (N2-1) 10 kohms or higher GB0 (z13-17) - GND (N2-5) 10 kohms or higher TB1 (z13-6) - IGCT (N2-1) 10 kohms or higher TB1 (z13-6) - GND (N2-5) 10 kohms or higher GB1 (z13-16) - IGCT (N2-1) 10 kohms or higher GB1 (z13-16) - GND (N2-5) 10 kohms or higher TB2 (z13-5) - IGCT (N2-1) 10 kohms or higher TB2 (z13-5) - GND (N2-5) 10 kohms or higher GB2 (z13-15) - IGCT (N2-1) 10 kohms or higher GB2 (z13-15) - GND (N2-5) 10 kohms or higher TB3 (z13-4) - IGCT (N2-1) 10 kohms or higher TB3 (z13-4) - GND (N2-5) 10 kohms or higher GB3 (z13-14) - IGCT (N2-1) 10 kohms or higher GB3 (z13-14) - GND (N2-5) 10 kohms or higher NG --> See step 4 OK --> See step 5
  4. REPLACE HV BATTERY. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)
  5. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)

Scheme 793

Scheme 793: DESCRIPTION
Scheme 793: DESCRIPTION
  1. The battery current sensor, which is mounted on the positive cable side of the HV battery, detects the amperage that flows to and from the HV battery. The battery smart unit receives a voltage of between 0 and 5 V that is in proportion to the amperage flowing in the cable. This voltage goes into the IB terminal from the battery current sensor. A battery current sensor output voltage below 2.5 V indicates that the HV battery is being discharged, and a voltage above 2.5 V indicates that the HV battery is being charged. The hybrid vehicle control ECU determines the amount of either charge or discharge amperage that is being received by the HV battery based on the signals that are input to terminal IB of the battery smart unit from the battery smart unit. The hybrid vehicle control ECU also calculates the SOC (state of charge) of the HV battery based on the accumulated amperage.
DTC No.DTC Detection ConditionTrouble Area
P0ABF-123 P0AC1-123 P0AC2-123When the battery current sensor is abnormal (1 trip detection)HV relay assembly (battery current sensor) Battery smart unit Wire harness or connector
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 794

Scheme 794: PROCEDURE
Scheme 794: PROCEDURE

Scheme 795

Scheme 795
Scheme 795

Scheme 796

Scheme 796
Scheme 796
  1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. CHECK HARNESS AND CONNECTOR (BATTERY ECU - BATTERY CURRENT SENSOR) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment trim cover front. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Remove the battery carrier. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Disconnect connector z13 from the battery smart unit. Disconnect the HV relay assembly (battery current sensor) connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition IB (z13-9) - IB (N7-3) Below 1 ohms GIB (z13-20) - GIB (N7-2) Below 1 ohms VIB (z13-10) - VIB (N7-1) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition IB (z13-9) or IB (N7-3) - Body ground 10 kohms or higher GIB (z13-20) or GIB (N7-2) - Body ground 10 kohms or higher VIB (z13-10) or VIB (N7-1) - Body ground 10 kohms or higher HINT: The wire harness is not available separately. If it cannot be repaired, replace the HV battery. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK BATTERY SMART UNIT (VIB VOLTAGE) WARNING: Be sure to wear insulated gloves. Connect connector z13 to the battery smart unit. Install the battery carrier. Refer to «INSTALLATION»(ref-387094-S17660948312011022400000) Connect the auxiliary battery positive terminal cable of the frame wire. Refer to «INSTALLATION»(ref-387094-S17558850652011022400000) Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition VIB (z13-10) - GIB (z13-20) 4.6 to 5.4 V HINT: If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be set. NG --> See step 6 OK: Go to next step
  4. CHECK BATTERY SMART UNIT (IB VOLTAGE) WARNING: Be sure to wear insulated gloves. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition IB (z13-9) - GIB (z13-20) 2.46 to 2.54 V HINT: If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be set. NG --> See step 5 OK --> See step 6
  5. REPLACE HV RELAY ASSEMBLY. Refer to «COMPONENTS»(ref-387094-S06470760162011022400000)
  6. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 797

Scheme 797: PROCEDURE
Scheme 797: PROCEDURE
  1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT) Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0A1F-123 is output. YES --> GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC NO: Go to next step
  2. CHECK CONNECTOR CONNECTION CONDITION WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment trim cover front. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Check the connection of connector z9 of the battery smart unit. OK The connector is connected securely and there are no contact problems. NG --> CONNECT SECURELY OK: Go to next step
  3. REPLACE BATTERY SMART UNIT Refer to «COMPONENTS»(ref-387094-S42447307232011022400000) NEXT: Go to next step
  4. CLEAR DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Clear the DTCs. NEXT: Go to next step
  5. RECONFIRM DTC OUTPUT Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. Check if DTCs are output. Result DTC P0AFA-123 is output. YES --> See step 6 NO --> COMPLETED
  6. REPLACE HV BATTERY. Refer to «COMPONENTS»(ref-387094-S20340730302011022400000)
WARNINGBefore inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

HINT

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Scheme 798

Scheme 798
Scheme 798

Scheme 799

Scheme 799
Scheme 799
  1. CHECK HARNESS AND CONNECTOR (VOLTAGE) WARNING: Be sure to wear insulated gloves. Remove the service plug grip. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the luggage compartment trim cover front. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Disconnect the frame wire. Refer to «REMOVAL»(ref-387094-S30075231042011022400000) Remove the battery bracket sub-assembly. Refer to «REMOVAL»(ref-387094-S01615996202011022400000) Connect the auxiliary battery positive terminal cable of the frame wire. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition IGCT (N2-1) - GND (N2-5) 11 to 14 V NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY SMART UNIT) WARNING: Be sure to wear insulated gloves. Disconnect connector A54 from the hybrid vehicle control ECU. Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition BTH+ (A54-91) - BTH+ (N2-2) Below 1 ohms BTH- (A54-114) - BTH- (N2-3) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition BTH+ (A54-91) or BTH+ (N2-2) - Body ground 10 kohms or higher BTH- (A54-114) or BTH- (N2-3) - Body ground 10 kohms or higher Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition BTH+ (A54-91) - Body ground Below 1 V BTH- (A54-114) - Body ground Below 1 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK WAVEFORM WARNING: Be sure to wear insulated gloves. Connect connector A54 from the hybrid vehicle control ECU. Connect connector N2 to the battery smart unit. Connect an oscilloscope between the battery smart unit terminals specified in the table below, and measure the waveform. Item Contents Terminal CH1: BTH+ (N2-2) - GND (N2-5) CH2: BTH- (N2-3) - GND (N2-5) Equipment Setting 2 V/DIV., 500 μs/DIV. Condition Power switch on (IG) NG --> See step 4 OK --> See step 5
  4. REPLACE BATTERY SMART UNIT. Refer to «COMPONENTS»(ref-387094-S42447307232011022400000)
  5. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to «COMPONENTS»(ref-387078-S13177553622011022400000)
  6. CHECK FUSE (IGCT NO. 3 FUSE) Remove the IGCT NO. 3 fuse from the engine room R/B No. 1. Measure the resistance according to the value(s) in the table below. Standard resistance Below 1 ohms NG --> READ VALUE USING FUSE (IGCT NO. 3 FUSE) OK: Go to next step
  7. CHECK HARNESS AND CONNECTOR WARNING: Be sure to wear insulated gloves. Install the IGCT NO. 3 fuse to the engine room R/B No. 1. Remove the integration relay from the engine room R/B No. 1. Disconnect connector N2 from the battery smart unit. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition IGCT (N2-1) - 1V-8 Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> CHECK AND REPAIR POWER SOURCE CIRCUIT

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