C2311

HYBRID TRANSMISSION / TRANSAXLE: ELECTRONIC SHIFT LEVER SYSTEM: C2311: HV Communication Line Malfunction

DTC C2311 - HV Communication Line Malfunction

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 (PCON SIGNAL)




(a) Check output waveform.
(1) Turn the power switch ON (IG).
(2) Using an oscilloscope, check the output waveform of the transmission control ECU connector.
OK:
The output waveform appears as shown in the illustration.






OK -- REPLACE TRANSMISSION CONTROL ECU
NG -- Continue to next step.

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




(a) Disconnect the T4 and H17 ECU connectors.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU