DESCRIPTION
The certification ECU (smart key ECU assembly) blinks the security indicator light (clock assembly) when the immobiliser is set (engine switch off).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Click here
OK:
DTCs are not output.
NG | ![]() |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (IMMOBILISER INDICATOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Smart Key > Active Test
Tester Display |
Measurement Item |
Type |
Diagnostic Note |
---|---|---|---|
Immobiliser Indicator |
Security indicator light |
OFF/ON |
- |
Tester Display |
---|
Immobiliser Indicator |
OK:
The security indicator light (clock assembly) operates normally.
NG | ![]() |
GO TO STEP 4 |
|
3. |
CHECK SECURITY INDICATOR LIGHT (CLOCK ASSEMBLY) |
(a) When the immobiliser is set, check that the security indicator light (clock assembly) blinks.*1
OK:
The security indicator light (clock assembly) blinks normally.
(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light (clock assembly) illuminates.*2
OK:
The security indicator light (clock assembly) illuminates normally.
Result |
Proceed to |
---|---|
*1 is NG (*2 is OK) |
A |
*2 is NG (*1 is OK) |
B |
A | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
B | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
4. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SECURITY INDICATOR LIGHT (CLOCK ASSEMBLY)) |
(a) Disconnect the F1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the F81 security indicator light (clock assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F1-20 (IND) - F81-9 (LP) |
Always |
Below 1 Ω |
F1-20 (IND) or F81-9 (LP) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Reconnect the F1 certification ECU (smart key ECU assembly) connector.
(b) Reconnect the F81 security indicator light (clock assembly) connector.
(c) Using an oscilloscope, check the waveform.
*a |
Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
- |
- |
Measurement Condition:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F1-20 (IND) - Body ground |
Engine switch off → on (IG) |
Pulse generation → Below 2 V |
OK | ![]() |
REPLACE SECURITY INDICATOR LIGHT (CLOCK ASSEMBLY)
|
NG | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Toyota CH-R Service Manual > Occupant Classification System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Occupant Classification System
DTC No.
Detection Item
Link
B1771
Passenger Side Buckle Switch Circuit Malfunction
B1780
Front Occupant Classification Sensor LH Circui ...
Toyota CH-R Service Manual > Vehicle Stability Control System: Speed Sensor Rotor Faulty (C1237)
DESCRIPTION
The skid control ECU (brake actuator assembly) measures the speed of each wheel
by receiving signals from each speed sensor.
These signals are used for recognizing that all four wheels are operating properly.
Therefore, signals from all wheels must be equal.
DTC No.
...