| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000255XM |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: G16E-GTS (BATTERY / CHARGING): CHARGING SYSTEM: P162B87; Lost Communication with Battery Monitor Module Missing Message; 2023 - 2025 MY GR Corolla [09/2022 - ] | ||
|
DTC |
P162B87 |
Lost Communication with Battery Monitor Module Missing Message |
DESCRIPTION
The ECM communicates with the battery state sensor assembly via LIN communication. If a LIN communication error is detected, the ECM stores this DTC.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Note |
|---|---|---|---|---|---|
|
P162B87 |
Lost Communication with Battery Monitor Module Missing Message |
Battery state sensor assembly or ECM communication stops for approximately 17 minutes or more with the ignition switch ON (1 trip detection logic) |
|
Charge warning is not displayed |
SAE Code: P162B |
WIRING DIAGRAM
Refer to DTC P161A87.
Click here
![2023 - 2025 MY GR Corolla [09/2022 - ]; G16E-GTS (BATTERY / CHARGING): CHARGING SYSTEM: P161A87; Lost Communication with Alternator Missing Message+](/t3Portal/stylegraphics/info.gif)
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
Before replacing the ECM, refer to Registration.
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PROCEDURE
|
1. |
CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION |
(a) Check installation condition of the battery state sensor assembly.
| NG |
|
|
|
2. |
CHECK CHARGING SYSTEM |
Click here
| NG |
|
REPAIR OR REPLACE CHARGING SYSTEM |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECM - BATTERY STATE SENSOR ASSEMBLY) |
(a) Disconnect the ECM connector.
(b) Disconnect the battery state sensor assembly connector.
(c) Disconnect the generator assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C142-62 (LIN) - O181-2 (LIN) |
Always |
Below 1 Ω |
|
C142-62 (LIN), O181-2 (LIN) or C81-2 (LIN) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Check that the battery state sensor assembly connector is securely connected.
OK:
The connector is securely connected.
(b) Disconnect the battery state sensor assembly connector.
(c) Check the connector case and terminals for deformation or corrosion.
OK:
No deformation or corrosion.
|
(d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CLEAR DTC |
(a) Check for DTCs, and note down any DTCs that are output.
Powertrain > Engine > Trouble Codes
(b) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(c) Turn the ignition switch off, wait 30 seconds.
|
|
6. |
CHECK DTC OUTPUT |
(a) Start the engine.
(b) Allow the engine to idle for approximately 17 minutes or more.
(c) Check for DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Only DTC P162B87 is output |
A |
|
DTC P161A87 and P162B87 are output. |
B |
|
DTCs are not output. |
C |
| A |
|
REPLACE BATTERY STATE SENSOR ASSEMBLY
|
| B |
|
REPLACE ECM
|
| C |
|
|
|