Inspection Procedure

HINT:

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU:

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

CHECK FOR DTC OUTPUT
1. Check for DTCs (See DTC CHECK/CLEAR ).
  OK: DTC output does not occur.
  
  NG: REFER TO DIAGNOSTIC TROUBLE CODE CHART (See )
  
  OK: Go to next step

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG) and turn the Techstream on.

Select the item "Lock/Unlock Receive" in the Data List within 10 seconds of starting the engine and read the value displayed on the Techstream.

Smart Key

DATA LIST REFERENCE

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
Lock/Unlock Receive	Steering lock command reception record/YES or NO	YES: Steering lock/unlock signal received NO: Steering lock/unlock signal not received	-

OK: YES is displayed on the Techstream screen.

NG: Go to step 5

OK: Go to next step

CHECK STEERING LOCK ECU

Measure the resistance and voltage according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 (GND) - Body ground	Always	Below 1 Ω
2 (SGND) - Body ground	Always	Below 1 Ω

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
7 (B) - 1 (GND)	Always	11 to 14 V
7 (B) - 2 (SGND)	Always	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 1: Identifying Terminals Of Steering Lock ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK STEERING LOCK ECU

Immediately after turning the engine switch on (IG), inspect the voltage between terminals 3 (IGE) and 2 (SGND) of the steering lock ECU.

Result

RESULT REFERENCE

Result	Proceed to
Immediately after turning engine switch on (IG), measurement is below 1 V.	A
Measurement is 11 to 14 V, and measurement never becomes below 1 V.	B

B: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Terminals Of Steering Lock ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (See REMOVAL )

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG) and turn the Techstream on.

Select the item "S Code Check" in the Data List and read the value displayed on the Techstream.

Smart Key

DATA LIST REFERENCE

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
S Code Check	S code match record/NG or OK	NG: S code not matched OK: S code matched	-

Result

RESULT REFERENCE

Result	Proceed to
NO is displayed on the Techstream screen.	A
YES is displayed on the Techstream screen.	B

B: Go to step 7

A: Go to next step

CHECK OPERATION OF ID CODE BOX

Replace the ID code box with a new one (See ID CODE BOX (W/SMART KEY SYSTEM) ).
NOTE: When replacing the ID code box, registration must be performed according to the "Registration" procedures (See REGISTRATION ).

Reconfirm the item "S Code Check" in the Data List and read the value displayed on the Techstream.

Smart Key

DATA LIST REFERENCE

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
S Code Check	S code match record/NG or OK	NG: S code not matched OK: S code matched	-

Result

RESULT REFERENCE

Result	Proceed to
NG is displayed on the Techstream screen.	A
OK is displayed on the Techstream screen.	B

B: REPLACE ID CODE BOX (See ID CODE BOX (W/SMART KEY SYSTEM) )

A: REPLACE ECU AGGREGATION BOX ASSEMBLY (CERTIFICATION ECU) (See CERTIFICATION ECU (W/SMART KEY SYSTEM) )

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG) and turn the Techstream on.

Select the item "L Code Check" in the Data List and read the value displayed on the Techstream.

Smart Key

DATA LIST REFERENCE

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
L Code Check	L code match record/NG or OK	NG: L code not matched OK: L code matched	-

Result

RESULT REFERENCE

Result	Proceed to
NG is displayed on the Techstream screen.	A
OK is displayed on the Techstream screen.	B

B: Go to step 9

A: Go to next step

CHECK OPERATION OF ID CODE BOX

Replace the ID code box with a new one (See ID CODE BOX (W/SMART KEY SYSTEM) ).
NOTE: When replacing the ID code box, registration must be performed according to the "Registration" procedures (See REGISTRATION ).

Reconfirm the item "L Code Check" in the Data List and read the value displayed on the Techstream.

Smart Key

DATA LIST REFERENCE

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
L Code Check	L code match record/NG or OK	NG: L code not matched OK: L code matched	-

Result

RESULT REFERENCE

Result	Proceed to
NG is displayed on the Techstream screen.	A
OK is displayed on the Techstream screen.	B

B: REPLACE ID CODE BOX (See ID CODE BOX (W/SMART KEY SYSTEM) )

A: Go to next step

CHECK OPERATION OF STEERING LOCK ECU
1. Replace the steering lock ECU with a new one (See REMOVAL ).
  NOTE: When replacing the steering lock ECU, registration must be performed according to the "Registration" procedures (See REGISTRATION ).
2. Turn the engine switch on (IG).
3. Check the steering lock.
  OK: Steering lock is released and engine starts.
  
  NG: REPLACE ECU AGGREGATION BOX ASSEMBLY (CERTIFICATION ECU) (See CERTIFICATION ECU (W/SMART KEY SYSTEM) )
  
  OK: REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) (See REMOVAL )