- Steering lock actuator assembly (steering lock ECU)
- Power management control ECU
- Harness or connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJ0K |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: STEERING COLUMN: STEERING LOCK SYSTEM: B2782; Power Source Control ECU Malfunction; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B2782 |
Power Source Control ECU Malfunction |
DESCRIPTION
The steering lock ECU activates the steering lock motor with the power from the power management control ECU through the IGE circuit. This prevents the steering from being locked while the vehicle is moving.
If NG (PAST) is displayed for Power Supply Open in the Data List, perform troubleshooting according to the procedures below.
The diagnosis information of the steering lock ECU is transmitted to the Techstream via the certification ECU as the steering lock actuator assembly (steering lock ECU) is not connected to the CAN communication system.
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
B2782 |
An IGE power supply circuit malfunction. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
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.
NOTICE:
- If the steering lock actuator assembly (steering lock ECU) is replaced, with the engine switch off and the shift lever in P, open and close the driver side door to record the current lock position into the steering lock ECU. If this is not performed, the engine may not start.
-
When replacing the steering lock ECU, registration must be performed (See page
![2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION](/t3Portal/stylegraphics/info.gif)
).
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND) |
(a) Disconnect the D29 steering lock ECU connector.
(b) Turn the engine switch off, make sure that the steering lock is unlocked and move the shift lever to P.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D29-1 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
INSPECT STEERING LOCK ECU (IGE VOLTAGE) |
|
(a) Reconnect the D29 steering lock ECU connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D29-3 (IGE) - D29-1 (GND) |
Steering lock motor operating immediately after turning engine switch from off to on (IG) |
Below 1 V |
|
D29-3 (IGE) - D29-1 (GND) |
Steering lock motor not operating |
11 to 14 V |
HINT:
When the steering lock is locked and the engine switch is turned on (IG), the steering lock motor activates to release the steering lock. The motor operates for 2 to 15 seconds.
Text in Illustration
|
*a |
Component with harness connected (Steering Lock ECU) |
| NG |
|
|
|
3. |
CLEAR DTC |
(a) Clear the DTCs (See page
).
(b) Disconnect and reconnect the cable to the negative (-) battery terminal to clear the malfunction history of Power Supply Open.
|
|
4. |
READ VALUE USING TECHSTREAM (POWER SUPPLY OPEN) |
(a) Check for DTCs (See page
).
(b) Use the Data List to check if the steering lock control is functioning properly (See page
).
Smart Key
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Power Supply Open |
Open in ECU record/NG (PAST) or OK |
NG (PAST): Open in ECU OK: No malfunction |
- |
Result
|
Result |
Proceed to |
|---|---|
|
A |
|
B |
| A |
|
USE SIMULATION METHOD TO CHECK (See page
|
| B |
|
|
5. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - POWER MANAGEMENT CONTROL ECU) |
(a) Disconnect the D89 power management control ECU connector.
(b) Disconnect the D29 steering lock ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D29-3 (IGE) - D89-8 (SLR+) |
Always |
Below 1 Ω |
|
D29-3 (IGE) or D89-8 (SLR+) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE POWER MANAGEMENT CONTROL ECU (See page
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|