Toyota CH-R Service Manual: Lost Communication with Alternator (P161A)
DESCRIPTION
The ECM and generator assembly detect reception errors respectively.
The generator assembly reception error detected by the generator assembly is sent to the ECM via LIN communication. If an error occurs in the ECM or generator assembly, the ECM determines there is a LIN communication error and stores this DTC.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
P161A |
Lost Communication with Alternator |
Generator assembly or ECM communication stop for about 17 minutes or more with the ignition switch ON. (1 trip detection logic) |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK CHARGING SYSTEM |
(a) Check the charging system.
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| NG | .gif) |
REPAIR OR REPLACE CHARGING SYSTEM |
|
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|
2. |
CHECK HARNESS AND CONNECTOR (ECM - GENERATOR WITH REGULATOR ASSEMBLY) |
(a) Disconnect the C63 ECM connector.
(b) Disconnect the C37 generator assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C63-61 (LIN) - C37-2 (LIN) |
Always |
Below 1 Ω |
|
C63-61 (LIN), C37-2 (LIN) - body ground |
Always |
10 kΩ or higher |
| OK | |
REPLACE GENERATOR ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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PROCEDURE
1.
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(a) Start the engine and visually check that the generator rotor assembly (fan)
in the gener ...
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Toyota C-HR (AX20) 2023-2025 Owner's Manual
Toyota CH-R Owners Manual
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