P0AFC-129 - Hybrid Battery Pack Sensor Module

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0AFC-129: Hybrid Battery Pack Sensor Module
P0AFC-129 - Hybrid Battery Pack Sensor Module

DESCRIPTION

The battery smart unit (battery energy control module) sends HV battery voltage information to the power management control ECU via serial communication.





MONITOR DESCRIPTION

The power management control ECU (HV CPU) calculates the differences between the received HV battery voltage, boost converter voltage, and inverter voltage. If any of the differences exceed prescribed values, the power management control ECU (HV CPU) determines that there is a malfunction in the battery smart unit circuit. When the power management control ECU (HV CPU) detects this malfunction, it will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





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).

6. With the shift lever in D, depress both the accelerator pedal and brake pedal at the same time to raise the SOC to a sufficient level.

7. Push the P position switch, check that the engine is stopped and move the shift lever to N.

8. Set the A/C for maximum cooling.

9. Leave the vehicle for a few minutes.

10. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

11. Check that permanent DTCs are cleared.

12. 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

NOTICE:
Performing the check procedures for a long time with the shift lever in N may cause DTC P3000-388 to be set.

HINT
If, after performing troubleshooting, it is necessary to replace the battery smart unit, voltages need to be confirmed after installing the new battery smart unit. Confirm that battery voltages (PWR RESOURCE VB), pre-boost voltage (VL), and post-boost voltage (VH) in the Data List are 220V or more with the power switch on (READY), park (P) selected, and the engine stopped. When the system is normal, the PWR RESOURCE VB, VL, and VH values should be almost equal (voltage boosting will not occur when the shift lever is in neutral). If the difference between each voltage exceeds the values specified below, there is a malfunction in the battery smart unit.





PROCEDURE

1. CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:





Table 1





Table 2





HINT
- *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
- P0AFC-129 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

(e) Turn the power switch off.

C -- GO TO DTC CHART (HYBRID BATTERY SYSTEM) Hybrid Battery System

B -- GO TO DTC CHART (HYBRID CONTROL SYSTEM) Hybrid Control System

A -- REPLACE BATTERY SMART UNIT Components