DESCRIPTION
This DTC is stored when there is an open or short circuit in the communication line between the front sensors and the ECU, or when there is a malfunction in a front sensor.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1AEC |
An open or short circuit in the communication line between the front sensors and ECU or a malfunction in a front sensor during initialization mode after the engine switch is turned on (IG). |
|
WIRING DIAGRAM
PROCEDURE
1. |
CHECK DTC OUTPUT (C1AEC) |
(a) Check for DTCs (See page ).
(b) Clear the DTCs (See page ).
(c) Recheck for DTCs (See page ).
Result |
Proceed to |
---|---|
DTC C1AEC is output |
A |
No DTCs are output |
B |
B | ![]() |
USE SIMULATION METHOD TO CHECK |
|
2. |
CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT LEFT SENSOR) |
(a) Disconnect the D79 clearance warning ECU assembly connector.
(b) Disconnect the A54 No. 1 ultrasonic sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D79-4 (BOF) - A54-1 (BI) |
Always |
Below 1 Ω |
D79-8 (SOF) - A54-3 (SI) |
Always |
Below 1 Ω |
D79-6 (E5) - A54-5 (EI) |
Always |
Below 1 Ω |
D79-4 (BOF) - Body ground |
Always |
10 kΩ or higher |
D79-8 (SOF) - Body ground |
Always |
10 kΩ or higher |
D79-6 (E5) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (FRONT LEFT SENSOR - FRONT RIGHT SENSOR) |
(a) Disconnect the A55 No. 1 ultrasonic sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A54-2 (BO) - A55-1 (BI) |
Always |
Below 1 Ω |
A54-4 (SO) - A55-3 (SI) |
Always |
Below 1 Ω |
A54-6 (EO) - A55-5 (EI) |
Always |
Below 1 Ω |
A54-2 (BO) - Body ground |
Always |
10 kΩ or higher |
A54-4 (SO) - Body ground |
Always |
10 kΩ or higher |
A54-6 (EO) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
INSPECT NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() |
REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) |
|
5. |
REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) |
|
6. |
CHECK DTC OUTPUT (C1AEC) |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
Result |
Proceed to |
---|---|
DTC C1AEC is output |
A |
No DTCs are output |
B |
B | ![]() |
END |
|
7. |
REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT SENSOR) |
|
8. |
CHECK DTC OUTPUT (C1AEC) |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
Result |
Proceed to |
---|---|
DTC C1AEC is output |
A |
No DTCs are output |
B |
A | ![]() |
REPLACE CLEARANCE WARNING ECU ASSEMBLY |
B | ![]() |
END |
Yaw Rate Sensor Output Malfunction (C1448/98)
DESCRIPTION
The skid control ECU receives signals from the yaw rate and acceleration sensor
via the CAN communication system.
The yaw rate sensor has a built-in acceleration sensor and detects the vehicle
condition.
DTC Code
DTC De ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
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more of the switch ...
IG2 Signal Malfunction (B2788)
DESCRIPTION
The steering lock ECU (steering lock actuator assembly) receives power from the
IG2 relay. When the voltage value indicated by the IG signal from the certification
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