| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000010Z57 |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: TC and CG Terminal Circuit; 2017 - 2020 MY Sienna [08/2016 - ] | ||
|
TC and CG Terminal Circuit |
DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking the SRS warning light.
HINT:
-
Make sure that DTCs which relate to the CAN communication system are not output. If any of these DTCs are output, check the CAN communication system (See page
![2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM](/t3Portal/stylegraphics/info.gif)
).
- When a warning light keeps blinking, a short to ground in the wiring of terminal TC of the DLC3 or an internal ground short in an ECU is suspected.
- The DTC output mode signal is transmitted through the CAN to each ECU including the center airbag sensor assembly. Thus if no systems enter DTC output mode, the ECM may have a malfunction.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (DLC3 - ECM) |
|
*a |
Front view of DLC3 |
|
*b |
Front view of wire harness connector (to ECM) |
(a) Turn the ignition switch off.
(b) Disconnect the connector from the ECM.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D16-13 (TC) - A69-33 (TC) |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (CG OF DLC3 - BODY GROUND) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
Text in Illustration
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (TC OF ECM) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
REPLACE ECM |
(a) Replace the ECM (See page
).
(b) Check for DTCs of the ECM.
Result
|
Result |
Proceed to |
|---|---|
|
Normal system code is output. |
A |
|
DTC is output. |
B |
|
DTC output mode is set (center airbag sensor assembly). |
C |
| A |
|
END |
| B |
|
GO TO INSPECTION PROCEDURE OF DTC OUTPUT (See page
|
| C |
|
|
|