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 > Meter / Gauge System: Entire Combination Meter does not Operate
DESCRIPTION This circuit is the power source circuit for the combination meter assembly. This circuit provides two types of power sources; one is a constant power source, and the other is an IG power source. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses of circu ...

Toyota CH-R Service Manual > Windshield Deicer System: Precaution
PRECAUTION IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ignition Switch (Position) Engine Swi ...

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

System Diagram

Customize Parameters

Other materials:

Toyota C-HR (AX20) 2023-2025 Owner's Manual

Toyota CH-R Owners Manual

Toyota CH-R Service Manual