Cruise Control System 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 SUB-ASSEMBLY)
CHECK SPIRAL CABLE SUB-ASSEMBLY
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM, BODY GROUND)
CRUISE CONTROL SYSTEM - 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 operating it in each direction and turns off after releasing it. 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 Techstream on.
Enter the following menus: Powertrain / Cruise Control / Data List.
Check the Data List for proper functioning of the cruise control main switch.
Cruise Control (ECM)Tester Display
| Measurement Item/Range
| Normal Condition
| Diagnostic Note
|
Main SW M-CPU
| Main switch signal (Main CPU)/ON or OFF
| ON: Cruise control main switch pushed
OFF: Cruise control main switch not pushed
| -
|
Cancel Switch
| CANCEL switch signal/ON or OFF
| ON: CANCEL switch on
OFF: CANCEL switch off
| -
|
SET/COAST Switch
| - (COAST)/SET switch signal/ON or OFF
| ON: - (COAST)/SET switch on
OFF: - (COAST)/SET switch off
| -
|
RES/ACC Switch
| + (ACCEL)/RES (RESUME) switch signal/ON or OFF
| ON: + (ACCEL)/RES (RESUME) switch on
OFF: + (ACCEL)/RES (RESUME) switch 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 3 items are defective)
| C
|
| 2.INSPECT CRUISE CONTROL MAIN SWITCH |
Remove the cruise control main switch (COROLLA_ZRE142 RM000000VQ3081X.html).
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
1 (ECC) - 3 (CCS)
| Main Switch off
| 1 MΩ or higher
|
Main Switch on
| Below 2.5 Ω
|
+ RES
| 235 to 245 Ω
|
- SET
| 617 to 643 Ω
|
CANCEL
| 1509 to 1571 Ω
|
Install the cruise control main switch (COROLLA_ZRE142 RM000000VQ1080X.html).
| 3.CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSEMBLY) |
Disconnect the Y2 connector from the spiral cable sub-assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified condition
|
A-1 - Y2-4
| Always
| Below 1 Ω
|
A-3 - Y2-3
| Always
| Below 1 Ω
|
Reconnect the Y2 connector from the spiral cable sub-assembly.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 4.CHECK SPIRAL CABLE SUB-ASSEMBLY |
- NOTICE:
- The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may cause airbag deployment. Be sure to read the page shown in the brackets.
- HINT:
- Removal (COROLLA_ZRE142 RM000000UWD09PX.html)
- Installation (COROLLA_ZRE142 RM000000UWA09QX.html)
Remove the spiral cable sub-assembly (COROLLA_ZRE142 RM000000UWD09PX.html).
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
Y2-3 (CCS) - E6-1 (CCS)
| The spiral cable position is center
| Below 1 Ω
|
The spiral cable position is 2.5 rotations to the left
|
The spiral cable position is 2.5 rotations to the right
|
Y2-4 (ECC) - E6-2 (ECC)
| The spiral cable position is center
| Below 1 Ω
|
The spiral cable position is 2.5 rotations to the left
|
The spiral cable position is 2.5 rotations to the right
|
- HINT:
- The spiral cable sub-assembly makes a maximum of approximately 5 rotations.
Install the spiral cable sub-assembly.
| 5.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM, BODY GROUND) |
Disconnect the spiral cable sub-assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
E6-1 (CCS) - A50-40 (CCS)
| Always
| Below 1 Ω
|
A50-40 (CCS) - Body ground
| Always
| 10 kΩ or higher
|
E6-2 (ECC) - Body ground
| Always
| Below 1 Ω
|
- Result:
Result
| Proceed to
|
NG
| A
|
OK (for 2ZR-FE)
| B
|
OK (for 2AZ-FE)
| C
|
Reconnect the ECM connector.
Reconnect the spiral cable sub-assembly connector.
| A |
|
|
|
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
