CRUISE CONTROL SYSTEM(for 8NR-FTS) Cruise Control Switch Circuit
| DTC Code | DTC Name |
|---|---|
| Cruise Control Switch Circuit |
DESCRIPTION
The cruise control main switch is used to turn the 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 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 points of the cruise control main switch turn on with switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Before replacing the ECM, refer to Service Bulletin.
PROCEDURE
READ VALUE ON GTS
-
*a
ON-OFF
*b
-/SET
*c
+/RES
*d
CANCEL
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Cruise Control / Data List.
Check the Data List to confirm proper functioning of the cruise control main switch.
Powertrain > Cruise Control > Data List
Tester Display
Measurement Item
Range
Normal Condition
Diagnostic Note
Cancel Switch
CANCEL switch signal
ON or OFF
ON: CANCEL switch on
OFF: CANCEL switch off
-
-SET Switch
-/SET switch signal
ON or OFF
ON: -/SET switch on
OFF: -/SET switch off
-
+RES Switch
+/RES switch signal
ON or OFF
ON: +/RES switch on
OFF: +/RES switch off
-
Cruise Ready Main-CPU
Cruise control system standby condition (Main-CPU)
ON or OFF
ON: Cruise control main switch (Main-CPU) SET
OFF: Cruise control main switch (Main-CPU) UNSET
-
Powertrain > Cruise Control > Data List
Tester Display
Cancel Switch
-SET Switch
+RES Switch
Cruise Ready Main-CPU
OK
When the cruise control main switch is operated, the display changes as shown above.
Result
Proceed to
OK
NG
-
INSPECT CRUISE CONTROL MAIN SWITCH
Inspect the cruise control main switch.
Result
Proceed to
OK
NG
CHECK CRUISE CONTROL SWITCH WIRE
-
*a
Front view of wire harness connector
(to Spiral Cable Sub-assembly)
*b
Front view of wire harness connector
(to Cruise Control Main Switch)
Remove the cruise control switch wire.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
z4-3 (CCS) - A-3
Always
Below 1 Ω
z4-4 (ECC) - A-1
Always
Below 1 Ω
Result
Proceed to
OK
NG
-
INSPECT SPIRAL CABLE SUB-ASSEMBLY
Inspect the spiral cable sub-assembly.
Result
Proceed to
OK
NG
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)
Disconnect the A173 ECM connector.
Disconnect the E6 spiral cable sub-assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
A173-55 (CCS) - E6-1 (CCS)
Always
Below 1 Ω
A173-41 (ECCS) - E6-2 (ECC)
Always
Below 1 Ω
A173-55 (CCS) or E6-1 (CCS) - Body ground
Always
10 kΩ or higher
A173-41 (ECCS) or E6-2 (ECC) - Body ground
Always
10 kΩ or higher
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)
CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
Disconnect the B208 ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
B208-53 (E1) - Body ground
Always
Below 1 Ω
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BODY GROUND)