C2311

P410 HYBRID TRANSMISSION / TRANSAXLE: ELECTRONIC SHIFT LEVER SYSTEM: C2311: Communication Error from HV ECU
C2311 - Communication Error from HV ECU

DESCRIPTION

The transmission control ECU assembly receives a P position switch signal from the power management control ECU (HV CPU) and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The transmission control ECU assembly stores this DTC when it detects a communication error between the power management control ECU (HV CPU) and the transmission control ECU assembly.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK TRANSMISSION CONTROL ECU ASSEMBLY

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

(b) Connect an oscilloscope between the transmission control ECU assembly terminals specified in the table below, and measure the waveform.









OK:

The waveform is similar to that shown in the illustration.

Text in Illustration





HINT
Perform this inspection with the connector connected.

(c) Turn the power switch off.

NG -- CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU - POWER MANAGEMENT CONTROL ECU)

OK -- REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Components

2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU - POWER MANAGEMENT CONTROL ECU)

(a) Disconnect connector A22 from the transmission control ECU assembly.

(b) Disconnect connector A20 from the power management control ECU.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the power management control ECU connector.

(e) Connect the transmission control ECU assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER MANAGEMENT CONTROL ECU Components