| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018YBX |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: PRE-COLLISION: PRE-COLLISION SYSTEM: ECU Power Source Circuit; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
ECU Power Source Circuit |
DESCRIPTION
This circuit supplies power to the driving support ECU assembly when the ignition switch is ON.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK DRIVING SUPPORT ECU ASSEMBLY (B VOLTAGE) |
|
(a) Disconnect the driving support ECU assembly connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A80-7 (B) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Turn the ignition switch off.
(e) Reconnect the driving support ECU assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|
2. |
CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BODY GROUND) |
|
(a) Disconnect the driving support ECU assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A80-28 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Connect the driving support ECU assembly connector.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|