P0AE6

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0AE6-225: Hybrid Battery Precharge Contactor Control Circuit Low

DTC P0AE6-225 - Hybrid Battery Precharge Contactor Control Circuit Low

DESCRIPTION

The SMRs (System Main Relays) are the relays that connect or disconnect the high voltage power system in accordance with commands from the hybrid vehicle control ECU.
The SMR system is composed of three SMRs and one system main resistor. SMRB and SMRG are located on the HV battery junction block in the HV battery pack. SMRP and the system main resistor are located in the hybrid vehicle converter (DC/DC converter) assembly in the HV battery pack.
To connect to the high voltage power system, the vehicle will first turn on SMRP and SMRB to charge the vehicle through the system main resistor. Then, SMRP will be turned off after SMRG is turned on. To shut off the high voltage power system, SMRB and SMRG are turned off.
When there is an open in the AMD line or IGCT line, the following DTCs are output:

P0AE6-225 is output first because the time required for diagnosis is the shortest.

MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors the operation of SMRP. If the hybrid vehicle control ECU detects an open or short in the SMRP circuit, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

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 intelligent tester or Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
(e) Refer to "Proceed to" in the table below to perform each inspection.
Result:

HINT:
- o : DTCs that are output
- - : DTCs that are not output

D -- CHECK FUSIBLE LINK AND FUSE
C -- CHECK FUSE
B -- CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION)
A -- Continue to next step.
2. CHECK FUSIBLE LINK AND FUSE

(a) Check the fuse (IGCT2 NO. 2) in the engine room No. 3 relay block, and the fusible link (MAIN) that is installed at the auxiliary battery, for improper installation and for an open circuit.
OK:
They are installed securely. There are no open circuits in the fusible link or fuse.
NG -- REPLACE FUSIBLE LINK AND FUSE
OK -- Continue to next step.
3. CHECK FUSES (IGCT3 FUSE)

(a) Check the connections of the hybrid vehicle control ECU connectors.
OK:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
5. CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip. L110F Hybrid Vehicle Control System

NOTE: 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 AMD terminal (hybrid vehicle converter side).
OK:
The terminal is connected securely and there is no contact problem.
(d) Check for arc marks on the AMD terminals (hybrid vehicle converter side and vehicle wire harness side).
Result:

C -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
6. CHECK TERMINAL VOLTAGE (AMD TERMINAL)

(a) Turn the power switch off.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage :

NG -- CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL)
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE)
(a) Disconnect the battery pack wire connector.

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

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU)
(a) Turn the power switch off.

(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.
9. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)
CAUTION: Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTE: 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.

(b) Disconnect the low voltage connector from the hybrid vehicle converter.
HINT: For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter, Components.

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. CHECK HYBRID VEHICLE CONVERTER

(a) Connect all the disconnected connectors.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:

HINT: Perform this inspection with the battery pack wire connector connected.

NG -- REPLACE HYBRID VEHICLE CONVERTER
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
11. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY PACK WIRE CONNECTOR)
(a) Turn the power switch off.

(b) Disconnect connector A74 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):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
12. CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip. L110F Hybrid Vehicle Control System

NOTE: 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 -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
13. CHECK TERMINAL VOLTAGE (AMD TERMINAL)

(a) Turn the power switch off.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage :

NG -- CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL)
OK -- REPLACE HYBRID VEHICLE CONVERTER
14. CHECK FUSE

(a) Check the fuse (IGCT2 NO. 2) in the engine room No. 3 relay block for improper installation and for an open circuit.
OK:
The fuse is installed securely. There is no open circuit in the fuse.
NG -- REPLACE FUSE (IGCT2 NO. 2 FUSE)
OK -- Continue to next step.
15. CHECK FUSE (IGCT NO. 3 FUSE)

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

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
17. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.

(b) Remove the service plug grip. L110F Hybrid Vehicle Control System

(c) Disconnect the low voltage connector from the hybrid vehicle converter.
HINT: For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter, Components.

(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 HYBRID VEHICLE CONVERTER
18. CHECK FUSIBLE LINK AND FUSE

(a) Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.
OK:
The fuse is installed securely. There is no open circuit in the fuse.
NG -- REPLACE FUSE (IGCT3 FUSE)
OK -- Continue to next step.
20. CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip. L110F Hybrid Vehicle Control System

NOTE: 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 -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
21. CHECK TERMINAL VOLTAGE (AMD TERMINAL)

(a) Turn the power switch off.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage :

NG -- CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL)
OK -- Continue to next step.
22. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE)
(a) Disconnect the battery pack wire connector.

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

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
23. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)
CAUTION: Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.
(b) Disconnect the low voltage connector from the hybrid vehicle converter.
HINT: For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter, Components.

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONVERTER
24. CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL)
(a) Turn the power switch off.
(b) Check the connection of the auxiliary battery negative terminal cable.
OK:
The cable is connected securely and there are no contact problems.
(c) Check for arc marks on the auxiliary battery negative terminal cable.
Result:

C -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
25. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY NEGATIVE TERMINAL - BODY GROUND)
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPAIR OR REPLACE FRAME WIRE (AUXILIARY BATTERY NEGATIVE TERMINAL - AMD TERMINAL)