C2303

P311 HYBRID TRANSMISSION / TRANSAXLE: ELECTRONIC SHIFT LEVER SYSTEM: C2303: Short in Power Source Relay Circuit
C2303 - Short in Power Source Relay Circuit

DESCRIPTION

The No. 2 integration relay is activated by output voltage from the transmission control ECU and supplies power to the shift control actuator (parking lock motor). The transmission control ECU outputs this DTC when it detects a malfunction in the No. 2 integration relay.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
It is not possible to clear the following DTCs using the Techstream: DTCs C2300 (Actuator System Malfunction), C2301 (Shift Changing Time Malfunction), C2303 (Short in Power Source Relay Circuit), C2304 (Open or Short Circuit in U Phase), C2305 (Open or Short Circuit in V Phase), C2306 (Open or Short Circuit in W Phase), C2307 (Power Supply) and C2309 (Open in B+ Circuit). After the repair, it is necessary to disconnect the P CON MAIN fuse and wait for at least 60 seconds to clear the DTCs.

PROCEDURE

1. CHECK SHIFT CONTROL ACTUATOR ASSEMBLY (SHIFT CONTROL ACTUATOR ASSEMBLY POWER SOURCE CIRCUIT)

(a) Disconnect connector from the shift control actuator assembly connector.

(b) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





(c) Connect the shift control actuator assembly connector.

(d) Turn the power switch off.

NG -- CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - NO. 2 INTEGRATION RELAY)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - SHIFT CONTROL ACTUATOR)

(a) Disconnect connector A35 from the transmission control ECU assembly.

(b) Disconnect connector from the shift control actuator assembly.

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





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the shift control actuator assembly connector.

(e) Connect the transmission control ECU assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Components

3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - NO. 2 INTEGRATION RELAY)

(a) Disconnect connector A35 from the transmission control ECU assembly.

(b) Disconnect connector 1G from the No. 2 integration relay.

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





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the No. 2 integration relay connector.

(e) Connect the transmission control ECU assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ACTUATOR ASSEMBLY - NO. 2 INTEGRATION RELAY)

(a) Disconnect connector from the shift control actuator assembly.

(b) Disconnect connector 1H from the No. 2 integration relay.

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





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the No. 2 integration relay connector.

(e) Connect the shift control actuator assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE NO. 2 INTEGRATION RELAY Components