P0AE2-161

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0AE2-161: Hybrid Battery Precharge Contactor Circuit Stuck Closed

DTC P0AE2-161 - Hybrid Battery Precharge Contactor Circuit Stuck Closed

DESCRIPTION

Refer to the circuit description for DTC P0AE6-225 P0AE6.
If the SMRG is stuck open, P0AE0-228 will usually be set. P0AE2-161 is used to pinpoint the problem more quickly and accurately.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AE6-225 P0AE6.

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, check the voltage at 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:
P0AE0-228 is output.
YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

(a) Check the connections of the hybrid vehicle control ECU connectors.
Result:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (BATTERY PACK WIRE CONNECTOR)

(a) Check the connection of the battery pack wire connector.
Result:
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 battery pack wire connector, Components.

NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK HYBRID VEHICLE CONTROL ECU

(a) Disconnect the battery pack wire connector Components.

(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY PACK WIRE CONNECTOR)
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY PACK WIRE CONNECTOR)
(a) Disconnect connector A54 from the hybrid vehicle control ECU.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:

(e) 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 -- Continue to next step.
6. CHECK CONNECTOR CONNECTION CONDITION (HV RELAY HIGH VOLTAGE CONNECTOR)
NOTE: Be sure to wear insulated gloves.

(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.
NOTE: After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedure because this may cause a malfunction.
(b) Check the connections of the HV relay assembly connectors.
Result:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
7. CHECK HIGH VOLTAGE FUSE
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.
(b) Measure the resistance according the the value(s) in the table below.
Standard resistance:

NG -- REPLACE ELECTRIC VEHICLE
OK -- Continue to next step.
8. CHECK CONNECTOR CONNECTION CONDITION (HV RELAY CONNECTOR)
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.
(b) Check the connection of the low voltage connector that drives the HV relay assembly.
Result:
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 connector that drives the HV relay assembly, Components.

NG -- CONNECT SECURELY
OK -- Continue to next step.
9. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONVERTER ASSEMBLY CONNECTOR)
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.
(b) Check the connection of the low voltage connector of the hybrid vehicle converter.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (HV RELAY ASSEMBLY - BATTERY PACK WIRE CONNECTOR)
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.
(b) Disconnect connector N6 from the HV relay assembly.
(c) Turn the power switch on (IG).

(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the battery pack wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) 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 -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONVERTER - BATTERY PACK WIRE CONNECTOR)
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.
(b) Disconnect connector N1 from the hybrid vehicle converter.
(c) Turn the power switch on (IG).

(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
12. INSPECT HV RELAY ASSEMBLY (SMRG)
CAUTION: Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
(b) Remove the HV relay assembly from the vehicle Components.
(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

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

NG -- REPLACE HV RELAY ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONVERTER
13. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY PACK WIRE CONNECTOR)
CAUTION: Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
(b) Disconnect connector A54 from the hybrid vehicle control ECU.
(c) Turn the power switch on (IG).

(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) 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 HYBRID VEHICLE CONTROL ECU