Toyota CH-R Service Manual: Back Door Entry Lock Function does not Operate

Toyota CH-R Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Back Door Entry Lock Function does not Operate

DESCRIPTION

If the entry lock function does not operate for the back door only, but the entry unlock function operates, the request code is being transmitted properly from the back door. In this case, there may be a problem related to the lock switch (connection between the back door opener switch assembly and certification ECU (smart key ECU assembly)).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The smart key system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Entry Function) after confirming that the communication systems are functioning properly.
Click here
When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
Check that there are no electrical key transmitter sub-assemblies in the vehicle.
Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.
Click here
After repair, confirm that no DTCs are output.

PROCEDURE

1.	CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation.

Click here

OK:

Door locks operate normally.

GO TO POWER DOOR LOCK CONTROL SYSTEM

2.	INSPECT TECHSTREAM (TR/B-DOOR LOCK SW)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Smart Key / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Smart Key > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Tr/B-Door Lock SW	Back door opener switch assembly (lock switch)	ON or OFF	ON: Back door opener switch assembly (lock switch) pressed OFF: Back door opener switch assembly (lock switch) not pressed	Displays whether the back door opener switch assembly (lock switch) is on or off. Use this Data List item to help determine if there is a switch malfunction when the back door lock function does not operate.

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Tr/B-Door Lock SW

Back door opener switch assembly (lock switch)

ON or OFF

ON: Back door opener switch assembly (lock switch) pressed

OFF: Back door opener switch assembly (lock switch) not pressed

Displays whether the back door opener switch assembly (lock switch) is on or off.
Use this Data List item to help determine if there is a switch malfunction when the back door lock function does not operate.

Body Electrical > Smart Key > Data List

Tester Display
Tr/B-Door Lock SW

HINT:

When checking the operation of the entry lock function several times, it can be operated up to 2 times consecutively. To operate the function 3 times or more consecutively, the doors need to be unlocked once. However, this is only for the entry lock function, other door lock operations, such as a wireless door lock operation can be performed consecutively.

OK:

The Techstream display changes correctly in response to the operation of the back door opener switch assembly.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

3.	CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the M67 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the S8 back door opener switch assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
M67-27 (TSW6) - S8-1 (L)	Always	Below 1 Ω
S8-2 (E) - Body ground	Always	Below 1 Ω
M67-27 (TSW6) or S8-1 (L) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (LOCK SWITCH)

(a) Remove the back door opener switch assembly.

Click here

(b) Inspect the back door opener switch assembly.

Click here

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE BACK DOOR OPENER SWITCH ASSEMBLY

Back Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION If the entry lock and unlock functions do not operate for the back door only, the request code may not be being transmitted from the back door. If the entry functions for other doors ...

Additional Key cannot be Registered

DESCRIPTION If additional registration is not possible, a malfunction of the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), engine switch, No. 1 indoor elect ...

Other materials:

Toyota CH-R Service Manual > Airbag System: Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)
DESCRIPTION The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and passenger airbag ON/OFF indicator. The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger without door airbag assembly. DTC B1660/43 is store ...

Toyota CH-R Owners Manual > Engine compartment: Engine oil
With the engine at operating temperature and turned off, check the oil level on the dipstick. ■ Checking the engine oil 1. Park the vehicle on level ground. After warming up the engine and turning it off, wait more than 5 minutes for the oil to drain back into the bottom of the engine. 2. ...