DESCRIPTION The SMRs
(System Main Relays) are the relays that connect or disconnect the
high-voltage system in accordance with commands from the hybrid vehicle
control ECU. There are 3 SMRs and 1 system main
resistor. SMRB, SMRP, SMRG and the system main resistor are located in
the HV battery junction block assembly. 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. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Warning Indicate | |
P0AE411 | Hybrid/EV Battery Precharge Contactor Circuit Short to Ground |
Short to ground in the SMRP circuit: Primary circuit of SMRP is malfunctioning.
(2 trip detection logic) |
- Wire harness or connector
- HV battery junction block assembly
- Hybrid vehicle control ECU
| Does not come on |
Master Warning Light: Comes on | Related Data List |
DTC No. | Data List | |
P0AE411 |
- VL-Voltage before Boosting
- VH-Voltage after Boosting
- Hybrid Battery Voltage
- SMRP Status
- SMRB Status
- SMRG Status
- SMRP Control Status
- SMRB Control Status
- SMRG Control Status
- Boosting Converter Shutdown Status
- Generator Inverter Shutdown Status
- Motor Inverter Shutdown Status
| CONFIRMATION DRIVING PATTERN
HINT: After
repair has been completed, clear the DTC and then check that the
vehicle has returned to normal by performing the following All Readiness
check procedure. Click here 
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (READY) and wait for 30 seconds or more.
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.
WIRING DIAGRAM Refer to the wiring diagram for the HV battery high-voltage line circuit.
Click here CAUTION / NOTICE / HINT
CAUTION:
- Before the following operations are conducted, take precautions to
prevent electric shock by turning the power switch off, wearing
insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
- To prevent electric shock, make sure to remove the service plug grip to
cut off the high voltage circuit before servicing the vehicle.
- After removing the service plug grip from the HV battery, put it in your
pocket to prevent other technicians from accidentally reconnecting it
while you are working on the high-voltage system.
- After removing 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.
Click here
HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
|
*a |
Without waiting for 10 minutes |
- Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.
NOTICE: After
turning the power switch off, waiting time may be required before
disconnecting the cable from the negative (-) auxiliary battery
terminal. Therefore, make sure to read the disconnecting the cable from
the negative (-) auxiliary battery terminal notices before proceeding
with work. Click here HINT:
If DTC P0AE411 is output, the power switch cannot be turned on (READY). PROCEDURE
| 1. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND) |
(a) Disconnect the G46 hybrid vehicle control ECU connector.
| (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G46-3 (SMRP) - Body ground |
Power switch off |
140 to 290 Ω | |
 |
|
*a | Rear view of wire harness connector
(to Hybrid Vehicle Control ECU) | | |
(c) Reconnect the G46 hybrid vehicle control ECU connector.
| OK |
 | REPLACE HYBRID VEHICLE CONTROL ECU |
|
NG |
 | |
| 2. |
CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) |
Click here
|
Result | Proceed to | |
OK | A | |
NG (The connector is not connected securely.) |
B | | NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) |
C |
| B |
| CONNECT SECURELY |
| C |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
A | |
| |
| 3. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - HV BATTERY JUNCTION BLOCK ASSEMBLY) |
CAUTION: Be sure to wear insulated gloves. (a) Check that the service plug grip is not installed.
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. (b) Remove the No. 1 HV battery cover panel RH. Click here
| (c) Disconnect the K18 HV battery junction block assembly connector. |
|
(d) Disconnect the G46 hybrid vehicle control ECU.
| (e) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G46-3 (SMRP) or K18-2 (SMRP) - Body ground and other terminals |
Power switch off |
10 kΩ or higher | |
 |
|
*a | Rear view of wire harness connector
(to Hybrid Vehicle Control ECU) | |
*b | Front view of wire harness connector
(to HV Battery Junction Block Assembly) | | |
(f) Reconnect the G46 hybrid vehicle control ECU connector. (g) Reconnect the K18 HV battery junction block assembly connector.
(h) Install the No. 1 HV battery cover panel RH.
| OK |
| REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
