Toyota CH-R Service Manual: Lost Communication with Alternator (P161A)

Toyota CH-R Service Manual / 3zr-fae Battery / Charging / Charging System / 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)
  • Wire harness and connector
  • Generator assembly
  • ECM

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 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
    On-vehicle Inspection
    ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT NOTICE: If the battery is weak or if the engine is difficult to start, recharge the battery and perform inspections again before returning the vehicl ...

    Charging Failure
    PROCEDURE 1. CHECK GENERATOR PULLEY WITH CLUTCH (ON-VEHICLE INSPECTION) (a) Start the engine and visually check that the generator rotor assembly (fan) in the gener ...

    Other materials:

    Toyota CH-R Service Manual > Smart Key System(for Start Function): System Diagram
    SYSTEM DIAGRAM Component Outline Engine switch Transponder key amplifier Turns on the power and starts the engine. Contains a built-in transponder key amplifier to start the engine when the elec ...

    Toyota CH-R Service Manual > Brake Actuator: On-vehicle Inspection
    ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT PROCEDURE 1. CONNECT TECHSTREAM (a) Connect the Techstream to the DLC3 with the ignition switch off. (b) Start the engine and run it at idle. (c) Turn the Techstream on. (d) Enter the following menus: Chassis / ABS/VSC/TRC/EPB / Active Test. HINT ...

    Toyota C-HR (AX20) 2023-2026 Owner's Manual

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2026 Copyright www.tochr.net
    0.0073