P0AFC-129
P313 HYBRID VEHICLE 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 hybrid vehicle control ECU via serial communication.
MONITOR DESCRIPTION
The hybrid vehicle control ECU calculates the differences between the received HV battery voltage, boost converter voltage, and inverter voltage. If any of the differences exceed prescribed values, the hybrid vehicle control ECU determines that there is a malfunction in the battery smart unit circuit. When the hybrid vehicle control ECU 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 ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the ignition switch off.
5. Turn the ignition switch to 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. Move the shift lever to P, 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 a new battery smart unit. To confirm normal operation, compare the HV battery voltage (PWR RESOURCE VB), pre-boost voltage (VL), and post-boost voltage (VH) in the Data List with the ignition switch ON (READY) and the shift lever in N. 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 (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
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 ignition switch off.
B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.
2. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
HINT
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 ignition switch off.
B -- GO TO DTC CHART Hybrid Battery System
A -- REPLACE BATTERY SMART UNIT Removal