P2519

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2519-766: A/C Request "A" Circuit
P2519-766 - A/C Request "A" Circuit

DESCRIPTION

The hybrid vehicle converter sends IDH signals to the hybrid vehicle control ECU to inform the ECU of the cooling requirement and output current control due to high temperature of the hybrid vehicle converter.





WIRING DIAGRAM





INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

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

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:





B -- GO TO DTC CHART (P0AE6-225) P0AE6
A -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL CONVERTER CONNECTOR)

CAUTION:
Be sure to wear insulated gloves.

(a) Turn the power switch off.

(b) Remove the service plug grip Hybrid Control System.

NOTICE:
After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair manual because this may cause a malfunction.

(c) Check the connection of the low voltage connector of the hybrid vehicle converter.









OK:

The connector is connected securely and there are no contact problems.

HINT
For the removal and installation procedures related to inspection of the connection of the low voltage connector of the hybrid vehicle converter, Components.

NG -- CONNECT SECURELY
OK -- Continue to next step.

3. CHECK CONNECTOR CONNECTION CONDITION (BATTERY SMART UNIT CONNECTOR)

(a) Check the connection of the battery smart unit connector.





OK:

The connector is connected securely and there are no contact problems.

HINT
It is necessary to move the HV battery to access the hybrid vehicle converter connector. For the removal and installation procedures related to inspection of the connection of the battery smart unit connector, Components.

NG -- CONNECT SECURELY
OK -- Continue to next step.

4. CHECK BATTERY SMART UNIT

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

(b) With the battery in an accessible position, connect the battery smart unit and hybrid vehicle converter connectors.

(c) Connect the 2 floor wires to the luggage room junction block assembly.





(d) Insulate the AMD terminal of the removed wire with insulating tape to prevent a short to body ground.

(e) Connect the battery pack wire connectors.

HINT
Connecting the battery pack wire connectors will allow power to be supplied to the battery smart unit when the power switch is turned on (IG).









(f) Disconnect the low voltage connector from the hybrid vehicle converter.





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

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

Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID VEHICLE CONVERTER)

OK -- REPLACE HYBRID VEHICLE CONVERTER Components

5. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID VEHICLE CONVERTER)

CAUTION:
Be sure to wear insulated gloves.

(a) Turn the power switch off.

(b) Check that the service plug grip is not installed.

(c) Disconnect connector z36 from the battery smart unit.





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

Standard resistance (Check for open):





Standard resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BATTERY SMART UNIT Components