Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Lost Communication with Alternator Missing Message (P161A87)

Toyota Tacoma 2015-2018 Service Manual / 2gr-fks Charging / Charging System / 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.

DTC Detection Condition

Trouble Area

P161A87

Generator assembly or ECM communication stop for about 17 minutes or more with the ignition switch ON.

(1 trip detection logic)

  • Wire harness and connector
  • Generator assembly
  • ECM

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

CHECK CHARGING SYSTEM

(a) Check the charging system (See page ).

NG

REPAIR OR REPLACE CHARGING SYSTEM

OK

2.

CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)

(a) Disconnect the E9 ECM connector.

(b) Disconnect the G2 generator assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E9-34 (LIN) - G2-2 (LIN)

Always

Below 1 Ω

E9-34 (LIN) or G2-2 (LIN) - Body ground

Always

10 kΩ or higher

OK

REPLACE GENERATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK BATTERY CONDITION NOTICE: If the battery is weak or if the engine is difficult to start, recharge the battery and perform inspections again before return ...

Charging Failure
PROCEDURE 1. CHECK GENERATOR PULLEY WITH CLUTCH (ON-VEHICLE INSPECTION) (a) Start the engine and visually check if the fan of the generator rotor assembly located i ...

Other materials:

Central Gateway ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Central Gateway ECU Communication Stop Mode Communication system DTCs (DTCs that start with U) that correspond to "Central Gateway ECU Communication Stop Mode" in "DTC Com ...

Front Occupant Classification Sensor LH Collision Detection (B1785)
DESCRIPTION DTC B1785 is set when the occupant detection ECU receives a collision detection signal, which is sent by the occupant classification sensor front LH when an accident occurs. DTC B1785 is also set when the front seat with adjuster frame assembly RH is subjected to a strong impact, ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the wireless charging system. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALY ...

© 2011-2021 Copyright www.ttguide.net