STEERING LOCK SYSTEM, Diagnostic DTC:B2782

DESCRIPTION

The certification ECU (smart key ECU assembly) has a power source mode switching function.

This DTC is stored when the IGE input (the steering lock motor activation permission signal) sent directly from the certification ECU (smart key ECU assembly) to the steering lock actuator assembly (steering lock ECU) is determined to be abnormal.

• *1: Only output while a malfunction is present and the engine switch is on (IG).

• *2: for CVT

• *3: for Multi-Mode Manual Transaxle

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

   
   

   1. Disconnect the F61 steering lock actuator assembly (steering lock ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F61-1 (GND) - Body ground Always Below 1 Ω

   3. Reconnect the F61 steering lock actuator assembly (steering lock ECU) connector.

   4. Turn the engine switch off, make sure that the steering is unlocked and move the shift lever to P*1 or N*2.

      
      

      • *1: for CVT

      • *2: for Multi-Mode Manual Transaxle

   5. 

      Text in Illustration

      *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))
      *b	Steering lock motor not operating
      *c	Steering lock motor operating

      Check the signal waveform according to the condition(s) in the table below.

      Standard Frequency

      Item	Content
      Tester Connection	F61-3 (IGE) - F61-1 (GND)
      Tool Setting	2 V/DIV., 200 ms./DIV.
      Vehicle Condition	Steering lock motor not operating → Steering lock motor operating → Steering lock motor not operating

      Tech Tips

      
      

      • When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.

      • In order to take measurements when the lock motor is operating, perform either of the following operations:

      
      

      • To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG) while the shift lever is in P*1 or N*2.

      • To lock the steering, turn the engine switch off with the shift lever is in P*1 or N*2, and then open a door.

      
      

      • *1: for CVT

      • *2: for Multi-Mode Manual Transaxle

   
   

   NG

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU) - STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)) Click here

   OK

2. CLEAR DTC AND DATA LIST MALFUNCTION RECORD

   
   

   1. Clear the DTCs Click here.

   2. Disconnect the cable from the negative (-) battery terminal, wait for 30 seconds or more, and then reconnect the cable to the negative (-) battery terminal to clear the record of malfunctions stored.

      Note

      After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notices before proceeding with work Click here.

   
   

   NEXT

3. CHECK DTC AND READ VALUE USING INTELLIGENT TESTER (POWER SUPPLY SHORT)

   
   

   1. Perform the DTC output confirmation operation.

   2. Check if DTC B2782 is output Click here.

   3. Use the Data List to check if the steering lock control is functioning properly.

      Entry & Start

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Power Supply Short	Record of malfunction of signal sent to steering lock motor (steering lock actuator assembly) from certification ECU (smart key ECU assembly) (short circuit) / OK or NG(Past)	OK: No record of malfunction (short circuit) NG(Past): Record of malfunction (short circuit) exists	This item records malfunctions in the circuit between the certification ECU (smart key ECU assembly) and steering lock motor (steering lock actuator assembly).

      Result

      Result		Proceed to
      B2782 is not output "OK" is displayed on the intelligent tester.		A
      B2782 is output "NG (Past)" is displayed on the intelligent tester.	for LHD	B
      	for RHD	C

   
   

   A

   SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR)

   B

   REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Click here

   C

   REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Click here

4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU) - STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU))

   
   

   1. Disconnect the F63 certification ECU (smart key ECU assembly) connector.

   2. Disconnect the F61 steering lock actuator assembly (steering lock ECU) connector.

   3. Check for deformation and corrosion of the connector case and terminals.

      OK
      There is no deformation or corrosion of the connector case or terminals.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F63-29 (SLR+) - F61-3 (IGE) Always Below 1 Ω F61-3 (IGE) - Body ground Always 10 kΩ or higher F63-29 (SLR+) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR