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 |
Clearance Sonar Main Switch Circuit
DESCRIPTION
The back sonar or clearance sonar switch assembly is installed at the base of
the driver side of the instrument panel.
When the clearance sonar main switch is turned on, an on signal is sent to the
clearance warning ECU assembly. The intuitiv ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL SEPARATE TYPE FRONT SEATBACK COVER
(a) Using a tacker, install the separate type front seatback heater to
the end of the separate type front seatback cover with 12 new tack pins.
NOTICE:
Be careful not ...
Check CAN Bus Lines for Short Circuit
DESCRIPTION
There may be a short circuit in the CAN bus main wire and/or CAN branch wire
when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below
54 Ω.
Symptom
Trouble Area
Resistance betwe ...