P0A1D-722

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A1D-721, P0A1D-722, P0A1D-723, P0A1D-765, P0A1D-787: Hybrid Powertrain Control Module
P0A1D-787 - Hybrid Powertrain Control Module

DESCRIPTION

The hybrid vehicle control ECU monitors its internal operation and detects malfunctions.





MONITOR DESCRIPTION

The hybrid vehicle control ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the hybrid vehicle control ECU checks the result of the ECU self-test. If the hybrid vehicle control ECU detects a "Fail" from the ECU self-test, it will conclude that there is an internal malfunction in the ECU. The hybrid vehicle control ECU 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) and after a few seconds, turn the power switch off. [A]

6. Repeat [A] 3 times. [B]

7. Turn the power switch on (IG) and turn the Techstream on.

8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]

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

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, 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. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. REPLACE HYBRID VEHICLE CONTROL ECU

HINT
Components

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