Toyota CH-R Service Manual: Security Indicator Light Does not Blink

Toyota CH-R Service Manual / Theft Deterrent / Keyless Entry / Immobiliser System(w/ Smart Key System) / Security Indicator Light Does not Blink

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:

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.
Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
Click here

PROCEDURE

1.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Body Electrical > Smart Key > Trouble Codes

OK:

DTCs are not output.

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).

(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	-

Body Electrical > Smart Key > Active Test

Tester Display
Immobiliser Indicator

OK:

The security indicator light (clock assembly) operates normally.

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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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.

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

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.

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

REPLACE SECURITY INDICATOR LIGHT (CLOCK ASSEMBLY)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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