Toyota CH-R Service Manual: How To Proceed With Troubleshooting

Toyota CH-R Service Manual / Door Lock / Wireless Door Lock Control System(w/ Smart Key System) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

The wireless door lock control system troubleshooting procedure is based on the premise that the power door lock control system is operating properly. Check the power door lock control system first before troubleshooting the wireless door lock control system. Use this procedure to troubleshoot the wireless door lock control system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS CHECK

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
The following 5 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time
Where	Whether the problem occurs at a specific location
Under what conditions?	Whether the doors were locked or unlocked, whether the engine switch was on, whether the engine has started
How did it happen?	Problem symptoms

PRE-CHECK

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

4.	CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

GO TO CAN COMMUNICATION SYSTEM

5.	CHECK FOR DTC (WIRELESS DOOR LOCK CONTROL SYSTEM)*

(a) Clear the DTCs.

Click here

Body Electrical > Smart Key > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Smart Key > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

6.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table	A
Fault is listed in Problem Symptoms Table	B

GO TO STEP 8

7.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here

(b) Data List / Active Test

Click here

(d) Inspection

8.	REPAIR OR REPLACE

9.	CONFIRMATION TEST

END

System Diagram

SYSTEM DIAGRAM Wireless Door Lock Control System Communication Table Sender Receiver Signal Line Certification ECU (Smart Key ...

Customize Parameters

CUSTOMIZE PARAMETERS CUSTOMIZE WIRELESS DOOR LOCK CONTROL SYSTEM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, first make sure th ...

Other materials:

Toyota CH-R Service Manual > Air Conditioning System(for Automatic Air Conditioning System With Side-mounted Air Conditioner Pressure Sensor): System Diagram
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Communication Line Air conditioning amplifier assembly ECM Magnet Clutch request signal CAN A/C Idleup request signal ...

Toyota CH-R Service Manual > Lighting System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1 Click here If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the he ...

Toyota CH-R Service Manual: How To Proceed With Troubleshooting

System Diagram

Customize Parameters

Other materials:

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

Toyota CH-R Owners Manual

Toyota CH-R Service Manual