| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018WSV |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Cruise Control Switch Circuit; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
Cruise Control Switch Circuit |
DESCRIPTION
The cruise control main switch operates 8 functions: SET, -(COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, CANCEL, and MODE. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME), TAP-UP, and + (ACCEL) functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. The ECM then reads the voltage value that has been changed by the switch operation to control MODE, SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL. The dynamic radar cruise control system has two cruise control modes: the constant speed control mode and vehicle-to-vehicle distance control mode.
- The vehicle-to-vehicle distance control mode is always selected when starting up the dynamic radar cruise control system.
- The operation of the constant speed control mode is the same as that for a conventional cruise control system.
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (CRUISE CONTROL MAIN SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Radar Cruise 1 / Data List.
(e) Check the Data List for proper functioning of the cruise control main switch.
Radar Cruise 1
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Cancel Switch |
CANCEL switch status/ ON or OFF |
ON: CANCEL switch on OFF: CANCEL switch off |
- |
|
-SET Switch |
-SET switch status/ ON or OFF |
ON: -SET switch on OFF: -SET switch off |
- |
|
+RES Switch |
+RES switch status/ ON or OFF |
ON: +RES switch on OFF: +RES switch off |
- |
|
Cruise Main Switch Operation Condition |
Cruise control main switch (ON/OFF button) status/ ON or OFF |
ON: Cruise control main switch (ON/OFF button) pushed OFF: Cruise control main switch (ON/OFF button) not pushed |
- |
OK:
When the cruise control main switch is operated, the display changes as shown above.
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (all items are defective) |
B |
|
NG (1 to 3 items are defective) |
C |
| A |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| C |
|
|
|
2. |
INSPECT CRUISE CONTROL MAIN SWITCH |
(a) Remove the cruise control main switch.
Click here
![2016 - 2020 MY Sienna [12/2015 - ]; CRUISE CONTROL: CRUISE CONTROL MAIN SWITCH: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Inspect the cruise main switch.
Click here
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - CRUISE CONTROL MAIN SWITCH) |
|
(a) Disconnect the cruise control switch wire connector from the spiral cable sub-assembly and cruise control main switch. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A-1 (ECC) - z3-4 (ECC) |
Always |
Below 1 Ω |
|
A-4 (CCS) - z3-3 (CCS) |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Cruise control switch wire (to Spiral Cable Sub-assembly) |
|
*b |
Cruise control switch wire (to Cruise Control Main Switch) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY |
NOTICE:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the page shown in the brackets.
(a) Remove the spiral cable with sensor sub-assembly.
Click here
(b) Inspect the spiral cable with sensor sub-assembly.
Click here
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - ECM, BODY GROUND) |
(a) Disconnect the D149 spiral cable with sensor sub-assembly (w/ Steering Heater).
(b) Disconnect the D21 spiral cable with sensor sub-assembly (w/o Steering Heater).
(c) Disconnect the A69 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance (w/ Steering Heater):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D149-1 (CCS) - A69-41 (CCS) |
Always |
Below 1 Ω |
|
D149-2 (ECC) - Body ground |
Always |
Below 1 Ω |
|
D149-1 (CCS) or A69-41 (CCS) - Body ground |
Always |
10 kΩ or higher |
Standard Resistance (w/o Steering Heater):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D21-1 (CCS) - A69-41 (CCS) |
Always |
Below 1 Ω |
|
D21-2 (ECC) - Body ground |
Always |
Below 1 Ω |
|
D21-1 (CCS) or A69-41 (CCS) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|