P0A1B-661 - Drive Motor "A" Control Module

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A1B-661: Drive Motor "A" Control Module
P0A1B-661 - Drive Motor "A" Control Module

DESCRIPTION

The inverter with converter assembly (MG ECU) monitors its internal operation and detects malfunctions.





MONITOR DESCRIPTION

The MG ECU (in the inverter with converter assembly) performs many diagnostic tests to verify proper operation of internal ECU systems. For one of those diagnostics, the MG ECU checks the result of the motor CPU self-test. If the MG ECU detects a "Fail" from the motor CPU self-test, it will conclude that there is an internal malfunction in the motor CPU. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





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, check the voltage at 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. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) P0A1B

C -- REPLACE MALFUNCTIONING PARTS

B -- CONNECT SECURELY
A -- Continue to next step.

2. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) P0A1B

C -- REPLACE MALFUNCTIONING PARTS

B -- CONNECT SECURELY
A -- Continue to next step.

3. INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG1) P0A1B

NG -- CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)
OK -- Continue to next step.

4. INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (MG2) P0A1B

NG -- CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)

OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components

5. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) P0A1B

C -- REPLACE MALFUNCTIONING PARTS

B -- CONNECT SECURELY
A -- Continue to next step.

6. CHECK GENERATOR CABLE P0A1B

NG -- REPLACE GENERATOR CABLE Components

OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components

7. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) P0A1B

C -- REPLACE MALFUNCTIONING PARTS

B -- CONNECT SECURELY
A -- Continue to next step.

8. CHECK MOTOR CABLE P0A1B

NG -- REPLACE MOTOR CABLE Components

OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components