DESCRIPTION
The forward recognition camera operates the pre-collision warning by sending a buzzer request signal to the skid control buzzer.
If the forward recognition camera detects a malfunction in the skid control buzzer circuit, it will output DTC C1AA7.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
C1AA7 |
Skid Control Buzzer Circuit |
When the ignition switch is turned to ON and the pre-collision warning is operating, and one of the following conditions is met (1 trip detection logic*):
|
|
Vehicle Condition |
||||
---|---|---|---|---|
Pattern 1 |
Pattern 2 |
Pattern 3 |
||
Diagnosis Condition |
When the ignition switch is turned to ON and the pre-collision warning is operating |
â—‹ |
â—‹ |
â—‹ |
Malfunction Status |
A buzzer request signal is sent to the skid control buzzer but the buzzer does not sound |
â—‹ |
- |
- |
A buzzer request signal is not sent to the skid control buzzer but the buzzer sounds |
- |
â—‹ |
- |
|
There is no buzzer sounding request and an open circuit is detected in the skid control buzzer |
- |
- |
â—‹ |
|
Detection Time |
1 second or more |
1 second or more |
1 second or more |
|
Number of Trips |
1 trip |
1 trip |
1 trip |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Perform the Active Test according to the display on the Techstream.
Click here
NOTICE:
Perform the Active Test for 1 second or more.
HINT:
Performing the Active Test for 1 second or more causes DTC C1AA7 to be stored if the DTC detection conditions are met.
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
---|---|---|---|
PCS Buzzer |
Skid control buzzer |
ON / OFF |
Test possible with ignition switch ON, vehicle stopped |
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC C1AA7 is not output |
A |
DTC C1AA7 is output |
B |
A | ![]() |
USE SIMULATION METHOD TO CHECK |
|
2. |
CHECK TERMINAL VOLTAGE |
(a) Disconnect the skid control buzzer connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
N38-2 (IG1) - Body ground |
Ignition switch ON |
11 to 14 V |
Ignition switch off |
Below 1 V |
(c) Connect the skid control buzzer connector.
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER - BATTERY) |
|
3. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the N38 skid control buzzer connector.
(b) Disconnect the F46 forward recognition camera connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
N38-1 (BZ) - F46-8 (BZ) |
Always |
Below 1 Ω |
N38-1 (BZ) or F46-8 (BZ) - Body ground |
Always |
10 kΩ or higher |
(d) Connect the F46 forward recognition camera connector.
(e) Connect the N38 skid control buzzer connector.
OK | ![]() |
GO TO STEP 6 |
|
4. |
REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER - FORWARD RECOGNITION CAMERA) |
(a) Repair or replace the harness or connector.
|
5. |
CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Perform the Active Test according to the display on the Techstream.
Click here
NOTICE:
Perform the Active Test for 1 second or more.
HINT:
Performing the Active Test for 1 second or more causes DTC C1AA7 to be stored if the DTC detection conditions are met.
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
---|---|---|---|
PCS Buzzer |
Skid control buzzer |
ON / OFF |
Test possible with ignition switch ON, vehicle stopped |
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC C1AA7 is not output |
A |
DTC C1AA7 is output |
B |
A | ![]() |
END |
|
6. |
INSPECT SKID CONTROL BUZZER (CONFIRM BUZZER OPERATION) |
(a) Turn the ignition switch to ON.
(b) Check if the skid control buzzer is sounding.
Result |
Proceed to |
---|---|
The skid control buzzer does not sound when the ignition switch is turned to ON |
A |
The skid control buzzer sounds continuously when the ignition switch is turned to ON |
B |
B | ![]() |
GO TO STEP 8 |
|
7. |
INSPECT SKID CONTROL BUZZER (UNIT INSPECTION) |
(a) Remove the skid control buzzer.
Click here
(b) Inspect the skid control buzzer.
Click here
Result |
Proceed to |
---|---|
Skid control buzzer is abnormal |
A |
Skid control buzzer is normal |
B |
B | ![]() |
GO TO STEP 9 |
|
8. |
REPLACE SKID CONTROL BUZZER |
(a) Replace the skid control buzzer.
Click here
|
9. |
CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Perform the Active Test according to the display on the Techstream.
Click here
NOTICE:
Perform the Active Test for 1 second or more.
HINT:
Performing the Active Test for 1 second or more causes DTC C1AA7 to be stored if the DTC detection conditions are met.
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
---|---|---|---|
PCS Buzzer |
Skid control buzzer |
ON / OFF |
Test possible with ignition switch ON, vehicle stopped |
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC C1AA7 is not output |
A |
DTC C1AA7 is output |
B |
A | ![]() |
END |
B | ![]() |
REPLACE FORWARD RECOGNITION CAMERA |
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