DESCRIPTION The hybrid vehicle control ECU controls the back-up lights via the BKUP LP relay. WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. (e) Check for DTCs. Powertrain > Hybrid Control > Trouble Codes
(a) Disconnect the 4D instrument panel junction block assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the 4F instrument panel junction block assembly connector. (b) Disconnect the A24 hybrid vehicle control ECU connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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(a) Connect the A24 hybrid vehicle control ECU connector. (b) Connect the 4D and 4F instrument panel junction block assembly connectors. (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Motor Generator Control System: Drive Motor "A" Inverter Actuator Stuck Closed (P0A7873)
DTC SUMMARY MALFUNCTION DESCRIPTION This DTC is stored when a short is detected in the inverter with converter assembly (motor inverter) or the hybrid vehicle transaxle assembly (motor (MG2)). The cause of this malfunction may be one of the following: Internal inverter malfunction Motor inverter int ...