P0A85

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A85-123: Hybrid Battery Pack Cooling Fan 1

DTC P0A85-123 - Hybrid Battery Pack Cooling Fan 1

DESCRIPTION

The speed of the battery cooling blower assembly is controlled by the hybrid vehicle control ECU. Battery cooling blower assembly power is supplied when the FCTL terminal of the hybrid vehicle control ECU turns on the battery blower relay. The hybrid vehicle 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 hybrid vehicle control ECU as a monitor signal using serial communication via the battery smart unit.










WIRING DIAGRAM





CAUTION:
- Before 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.

INSPECTION PROCEDURE
CAUTION:
- Before 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.

PROCEDURE

1. CHECK FOR DTCS (DTC P0A1F-123 IS OUTPUT)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTC P0A1F-123 is output.
YES -- GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC
NO -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (VOLTAGE)
CAUTION: Be sure to wear insulated gloves.
(a) Remove the service plug grip Removal.
(b) Remove the battery smart unit Removal.
HINT: Do not disconnect the battery smart unit connectors.
(c) Connect Techstream to the DLC3.
(d) Turn the power switch on (IG).
(e) Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.
HINT: Check "Cooling Fan Mode 1" in the data list using Techstream. If the "Cooling Fan Mode 1" to 6, it is not necessary to perform the Active Test.
(f) Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" active test to operate the battery cooling blower assembly.




(g) Measure the voltage according to the value(s) in the table below while the cooling fan is operating.
Standard voltage:






OK -- CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR AND INLET AIR TEMPERATURE SENSOR)
NG -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - BATTERY SMART UNIT)
CAUTION: Be sure to wear insulated gloves.
(a) Disconnect connector n2 from the battery smart unit.




(b) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK BATTERY SMART UNIT (VOLTAGE)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch on (IG).




(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE BATTERY SMART UNIT
OK -- REPLACE BATTERY COOLING BLOWER ASSEMBLY
5. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR AND INLET AIR TEMPERATURE SENSOR)
CAUTION: Be sure to wear insulated gloves.
(a) Disconnect connector o1 from the battery smart unit.
(b) Disconnect connector n2 from the battery smart unit.




(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):






NG -- REPLACE HV BATTERY
OK -- REPLACE BATTERY SMART UNIT