Toyota Tacoma (2015-2018) Service Manual: Cruise Control Switch Circuit
DESCRIPTION
The cruise control main switch is used to turn the dynamic radar cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL.
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 contains momentary type contacts for each function. The contacts close only while the cruise control main switch is being operated in the direction of the relative function arrow, and open when the cruise control main switch is released. The voltage at the terminal of the hybrid vehicle control ECU assembly changes as each of the different contacts open or close. The hybrid vehicle control ECU assembly reads this voltage and controls the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions accordingly.
- Vehicle-to-vehicle distance control mode is selected by default when the dynamic radar cruise control system is turned on using the cruise control main switch (ON-OFF button).
- The operation of constant speed control mode is the same as that for a conventional cruise control system.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Before replacing the ECM, refer to Registration.
w/o Smart Key System: Click here
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w/ Smart Key System: Click here
- The vehicle is equipped with a Supplemental Restraint System (SRS) which
includes components such as airbags. Before servicing (including removal
or installation of parts), be sure to read the precaution for Supplemental
Restraint System.
Click here
PROCEDURE
|
1. |
READ VALUE ON TECHSTREAM |
(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 Cruise1 / Data List.
(e) Read the Data List according to the display on the Techstream.
Powertrain > Radar Cruise1 > Data List
|
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:
The Data List items shown in the table change according to the operation of the cruise control main switch.
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
|
2. |
INSPECT CRUISE CONTROL MAIN SWITCH |
(a) Remove the cruise control main switch.
Click here
|
*a |
Component without harness connected (Cruise Control Main Switch) |
- |
- |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
1 - 3 |
+ (ACCEL)/RES (RESUME) |
235 to 245 Ω |
|
1 - 3 |
- (COAST)/SET |
617 to 643 Ω |
|
1 - 3 |
CANCEL |
1,509 to 1,571 Ω |
|
1 - 3 |
Main Switch OFF |
10 kΩ or higher |
|
1 - 3 |
Main Switch ON |
Below 1 Ω |
(c) Reinstall the cruise control main switch.
| NG | |
REPLACE CRUISE CONTROL MAIN SWITCH |
|
|
3. |
CHECK CRUISE CONTROL SWITCH WIRE |
|
(a) Remove the cruise control switch wire. Click here |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
|
Tester Connection |
Specified Condition |
|---|---|
|
Cruise control main switch side connector terminal 3 - z2-3 |
Below 1 Ω |
|
Cruise control main switch side connector terminal 1 - z2-4 |
Below 1 Ω |
| NG | |
REPLACE CRUISE CONTROL SWITCH WIRE |
|
|
4. |
INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY |
(a) Remove the spiral cable with sensor sub-assembly.
Click here
(b) Inspect the spiral cable with sensor sub-assembly.
Click here
| NG | |
REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY |
|
|
5. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - ECM AND BODY GROUND) |
(a) Disconnect the S8 spiral cable with sensor sub-assembly connector.
(b) Disconnect the E13 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S8-1 (CCS) - E13-17 (CCS) |
Always |
Below 1 Ω |
|
S8-2 (ECC) - Body ground |
Always |
Below 1 Ω |
|
S8-1 (CCS) or E13-17 (CCS) - Body ground |
Always |
10 kΩ or higher |
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Clutch Switch Circuit
DESCRIPTION
Clutch switch circuit inspection is necessary for manual transmission vehicles.
When the clutch pedal is released, the ECM receives the positive (+) battery
voltage through the ECU-IG ...
Cruise Main Indicator Light Circuit
DESCRIPTION
When the dynamic radar cruise control system is turned on using the cruise control
main switch (ON-OFF button), the cruise control indicator (vehicle-to-vehicle distance
control mode) ...
Other materials:
Check Bus 5 Line for Short to +B
DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no
resistance exists between terminal 15 (CA5H) of the central gateway ECU (network
gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central
gateway ECU (network gateway ECU) and ...
Steering Angle Sensor Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Steering Angle Sensor Communication Stop Mode
Either condition is met:
Communication stop for "Spiral cable (Steering Angle Sensor)"
is indicated on the "C ...
Listening to Bluetooth® audio
The Bluetooth® audio system enables the user to enjoy music played on a portable
player from the vehicle speakers via wireless communication.
Select “ Audio” on the “Select Audio Source” screen.
When a Bluetooth® device cannot be connected, check the connection status on
the “Bluet ...
