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

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

1.	CHECK CHARGING SYSTEM

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

REPAIR OR REPLACE CHARGING SYSTEM

2.	CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)

(a) Disconnect the E9 ECM connector.

(b) Disconnect the G2 generator assembly connector.

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

REPLACE GENERATOR ASSEMBLY

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:

New Key cannot be Registered
DESCRIPTION If an electrical key transmitter could not be newly registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, steering lock ECU (steering lock actuator or UPR bracket assembly) or electrical key and T ...

Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. When installing a new front fender wheel opening moulding or quarter panel wheel opening moulding, heat the vehicle body and front fender ...

Screen Flicker or Color Distortion
PROCEDURE 1. CHECK DISPLAY SETTING (a) Reset display settings (contrast, brightness) and check that the screen appears normal. OK: The display returns to normal. OK END NG PROCEED TO NEXT SUSPECTED AREA SHOWN IN ...