Cruise Control System (For Sedan) Cruise Control Switch Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING TECHSTREAM
INSPECT CRUISE CONTROL MAIN SWITCH
CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE)
CHECK SPIRAL CABLE
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM AND BODY GROUND)
CRUISE CONTROL SYSTEM (for Sedan) - Cruise Control Switch Circuit |
DESCRIPTION
The cruise control main switch operates 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 is an automatic return type switch which turns on only while operated in the directions of the arrows and turns off when it is released. The internal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.READ VALUE USING TECHSTREAM |
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Cruise Control / Data List.
According to the display on tester, read the "Data List".
- Cruise control:
Tester Display
| Measurement Item/Range
| Normal Condition
| Diagnostic Note
|
CCS Main SW M-CPU
| Main switch (Main CPU) / ON or OFF
| ON: Main switch (Main CPU) is ON
OFF: Main switch (Main CPU) is OFF
| -
|
Cancel Switch
| CANCEL switch / ON or OFF
| ON: CANCEL switch is ON
OFF: CANCEL switch is OFF
| -
|
SET/COAST Switch
| - / SET switch / ON or OFF
| ON: - / SET switch is ON
OFF: - / SET switch is OFF
| -
|
RES/ACC Switch
| + / RES switch / ON or OFF
| ON: + / RES switch is ON
OFF: + / RES switch is OFF
| -
|
- 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 5 items are defective)
| C
|
| A |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2.INSPECT CRUISE CONTROL MAIN SWITCH |
Remove the cruise control main switch.
Measure the resistance.
- Standard resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
1 - 3
| cruise control switch neutral
| 10 kΩ or higher
|
cruise control switch ON
| Below 1 Ω
|
cruise control switch OFF
| 10 kΩ or higher
|
+/RES
| 235 to 245 Ω
|
-/SET
| 617 to 643 Ω
|
CANCEL
| 1509 to 1571 Ω
|
Reinstall the cruise control main switch.
| 3.CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE) |
Disconnect the spiral cable side connector.
Disconnect the cruise control main switch side connector.
Measure the resistance.
- Standard resistance:
Tester Connection
| Specified Condition
|
Terminal 1 (ECC) main switch side - Terminal 4 (ECC) spiral cable side
| Below 1 Ω
|
Terminal 3 (CCS) main switch side - Terminal 3 (CCS) spiral cable side
| Below 1 Ω
|
Reconnect the spiral cable side connector.
Reconnect the cruise control main switch side connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
- NOTICE:
- The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the page shown in the brackets. (YARIS_NCP93 RM000000KT10D1X.html)
Remove the spiral cable.
Measure the resistance.
- Standard resistance:
Tester Connection
| Specified Condition
|
Terminal 3 (CCS) main switch side - CCS (D3-1)
| Below 1 Ω
|
Terminal 4 (ECC) main switch side - ECC (D3-2)
| Below 1 Ω
|
- HINT:
- The spiral cable makes a maximum of approximately 5 rotations.
Reinstall the spiral cable.
| 5.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM AND BODY GROUND) |
Disconnect the A21 ECM connector.
Disconnect the D3 spiral cable (vehicle side) connector.
Measure the resistance.
- Standard resistance:
Tester Connection
| Specified Condition
|
A21-40 (CCS) - D3-1 (CCS)
| Below 1 Ω
|
A21-40 (CCS) or D3-1 (CCS) - Body ground
| 10 kΩ or higher
|
D3-2 (ECC) - Body ground
| Below 1 Ω
|
Reconnect the ECM connector.
Reconnect the spiral cable (vehicle side) connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
