| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026KUQ |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [09/2022 - 03/2023] |
| Title: M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: P161A87; Lost Communication with Alternator Missing Message; 2023 MY Corolla Corolla Hatchback [09/2022 - 03/2023] | ||
|
DTC |
P161A87 |
Lost Communication with Alternator Missing Message |
DESCRIPTION
The ECM communicates with the generator 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 |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P161A87 |
Lost Communication with Alternator Missing Message |
Generator 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 |
DTC stored |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK CHARGING SYSTEM |
(a) Check the charging system.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback [09/2022 - ]; M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION](/t3Portal/stylegraphics/info.gif)
| NG |
|
REPAIR OR REPLACE CHARGING SYSTEM |
|
|
2. |
CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY) |
(a) Disconnect the C76 ECM connector.
(b) Disconnect the C81 generator assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C76-62 (LIN) - C81-2 (LIN) |
Always |
Below 1 Ω |
|
C76-62 (LIN) or C81-2 (LIN) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE GENERATOR ASSEMBLY for Denso Made Generator: Click here
for VALEO Made: Click here
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|