| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000255XL |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: G16E-GTS (BATTERY / CHARGING): CHARGING SYSTEM: P161A87; Lost Communication with Alternator Missing Message; 2023 - 2025 MY GR Corolla [09/2022 - ] | ||
|
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 |
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 |
SAE Code: P161A |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
-
Before replacing the ECM, refer to Registration.
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PROCEDURE
|
1. |
CHECK CHARGING SYSTEM |
Click here
| NG |
|
REPAIR OR REPLACE CHARGING SYSTEM |
|
|
2. |
CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY) |
(a) Disconnect the ECM connector.
(b) Disconnect the generator assembly connector.
(c) Disconnect the battery state sensor 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) - C81-2 (LIN) |
Always |
Below 1 Ω |
|
C142-62 (LIN), C81-2 (LIN) or O181-2 (LIN) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CLEAR DTC |
(a) Check for DTCs, and then write them down.
Powertrain > Engine > Trouble Codes
(b) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(c) Turn the ignition switch off and wait 30 seconds.
|
|
4. |
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 P161A87 is output. |
A |
|
DTC P161A87 and P162B87 are output. |
B |
|
DTCs are not output. |
C |
| A |
|
REPLACE GENERATOR ASSEMBLY
|
| B |
|
REPLACE ECM
|
| C |
|
|
|