Toyota CH-R Service Manual: Diagnosis System

Toyota CH-R Service Manual / Door Lock / Wireless Door Lock Control System(w/ Smart Key System) / Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

The main body ECU (multiplex network body ECU) stores DTCs when malfunctions occur.

The diagnostic system allows for reading of the DTCs from the DLC3.

Use the Techstream to check for malfunctions and perform repairs.

CHECK DLC3

(a) Check the DLC3.

Click here

INSPECT BATTERY VOLTAGE

(a) Measure the vehicle battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery.

SELF-DIAGNOSTIC MODE (USING Techstream)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Body Electrical / Smart Key / Utility / Wireless Door Lock Diagnosis Mode.

Body Electrical > Smart Key > Utility

Tester Display
Wireless Door Lock Diagnosis Mode

(e) Proceed to the next step in accordance with the prompts on the Techstream screen.

(f) Check that the system has switched to self-diagnostic mode by checking the wireless door lock buzzer output pattern.

(g) Check the diagnostic output when an electrical key transmitter sub-assembly switch is pressed. The diagnostic outputs can be checked by the wireless door lock buzzer pattern.

Result

Wireless Door Lock Buzzer Output	Suspected Area
A	Normal (No malfunction)
B	Register electrical key transmitter sub-assembly
C	Wave interference or malfunction of a related component

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Terminals Of Ecu

TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *A Main Body ECU (Multiplex Network Body ECU) with 2 Connecto ...

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