Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026PVG |
Model Year Start: 2023 |
Model: Corolla HV |
Prod Date Range: [09/2022 -
] |
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0AD911; Hybrid/EV Battery Positive Contactor Circuit Short to Ground; 2023 - 2025 MY Corolla HV [09/2022 - ] |
DTC
|
P0AD911
|
Hybrid/EV Battery Positive Contactor Circuit Short to Ground
|
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 2 SMRs. SMRB and SMRG are located in the HV battery junction block assembly.
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
|
Note
|
P0AD911
|
Hybrid/EV Battery Positive Contactor Circuit Short to Ground
|
Short to ground in the SMRB circuit:
Primary circuit of SMR (+) 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:
Comes on
|
SAE Code:
P0ADB
|
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 GTS to the DLC3.
-
Turn the ignition switch to ON and turn the GTS on.
-
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the ignition switch off and wait for 2 minutes or more.
-
Turn the ignition switch to ON (READY) and wait for 30 seconds or more.
-
Turn the ignition switch off and wait for 2 minutes or more.
-
Turn the ignition switch to ON and turn the GTS 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, 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:
Refer to the precautions before inspecting high voltage circuit.
Click here
HINT:
If DTC P0AD911 is output, the ignition switch cannot be turned to ON (READY).
PROCEDURE
1.
|
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND)
|
(a) Disconnect the 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
|
I3-3 (SMRB) - Body ground
|
Ignition switch off
|
20.6 to 40.8 Ω
|
(c) Reconnect the hybrid vehicle control ECU connector.
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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the HV battery junction block assembly connector.
|
|
(c) Disconnect the hybrid vehicle control ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I3-3 (SMRB) or O193-4 (SMRB) - Body ground and other terminals
|
Ignition switch off
|
10 kΩ or higher
|
(e) Reconnect the hybrid vehicle control ECU connector.
(f) Reconnect the HV battery junction block assembly connector.
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|