Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Lost Communication with Alternator Missing Message (P161A87)

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 engine switch on (IG).

(1 trip detection logic)

  • Wire harness and connector
  • Generator assembly
  • ECM

Charge warning is not displayed

DTC stored

SAE Code: P161A

WIRING DIAGRAM

PROCEDURE

1.

CHECK CHARGING SYSTEM

(a) Check the charging system.

Click here

NG

REPAIR OR REPLACE CHARGING SYSTEM

OK

2.

CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)

(a) Disconnect the C56 ECM connector.

(b) Disconnect the C57 generator assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C56-135 (LIN) - C57-2 (LIN)

Always

Below 1 Ω

C56-135 (LIN) or C57-2 (LIN) - Body ground

Always

10 kΩ or higher

OK

REPLACE GENERATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    On-vehicle Inspection

    Parts Location

    See More:

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Air Conditioning System(for Gasoline Model): Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting)
    DESCRIPTION If the temperature of the air that blows from the left and right front registers differs, even though the same temperature is set for both sides, the following factors may be the cause. Symptom Factor Temperature of outlet air is cooler on left or right side (when same temperature set fo ...

    Toyota Avalon (XX50) 2019-2022 Owners Manual

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

    © 2024 Copyright www.tavalon.net
    0.0303