Dynamic Radar Cruise Control System

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: C1A4A: Skid Control Buzzer Circuit
C1A4A - Skid Control Buzzer Circuit

DESCRIPTION

A buzzer sounds to alert the driver when the vehicle-to-vehicle distance becomes less than the set value.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test / DSS Signal Buzzer.

(e) Perform the Active Test.

ABS/VSC/TRAC





OK:

Skid control buzzer sounds.

NG -- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK FOR DTCs (DTC C1A4A)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Clear the DTCs Dynamic Radar Cruise Control System.

(d) Perform the following to make sure that the DTC detection conditions are met.

HINT
If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed of between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

(2) Turn the cruise control switch (ON-OFF button).

(3) Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

(e) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(f) Check for DTCs.

Result:





B -- REPLACE DRIVING SUPPORT ECU ASSEMBLY

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

3. REPLACE DRIVING SUPPORT ECU ASSEMBLY

(a) Replace the driving support ECU assembly Removal.

NEXT -- Continue to next step.

4. CHECK FOR DTCs (DTC C1A4A)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Clear the DTCs Dynamic Radar Cruise Control System.

(d) Perform the following to make sure that the DTC detection conditions are met.

HINT
If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed of between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

(2) Turn the cruise control system on using the cruise control switch (ON-OFF button).

(3) Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

(e) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(f) Check for DTCs.

Result:





B -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER

A -- END

5. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER

(a) Replace the brake booster with master cylinder (skid control ECU) Removal.

NEXT -- Continue to next step.

6. CHECK FOR DTCs (DTC C1A4A)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Clear the DTCs Dynamic Radar Cruise Control System.

(d) Perform the following to make sure that the DTC detection conditions are met.

HINT
If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed of between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

(2) Turn the cruise control system on using the cruise control switch (ON-OFF button).

(3) Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

(e) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(f) Check for DTCs.

Result:





B -- REPLACE POWER MANAGEMENT CONTROL ECU Removal

A -- END