C2311

P311 HYBRID TRANSMISSION / TRANSAXLE: ELECTRONIC SHIFT LEVER SYSTEM: C2311: Communication Error from HV ECU
C2311 - Communication Error from HV ECU

DESCRIPTION

The transmission control ECU receives a P position switch signal from the hybrid vehicle control ECU and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The transmission control ECU outputs this DTC when it detects a communication error between the hybrid vehicle control ECU and the transmission control ECU.





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 check the waveform.









OK:

The waveform appears as 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 - HYBRID VEHICLE CONTROL ECU)

OK -- REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Components

2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect connector A36 from the transmission control ECU assembly.

(b) Disconnect connector A58 from the hybrid vehicle 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 hybrid vehicle control ECU connector.

(e) Connect the transmission control ECU assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components