Lexus NX: Front Recognition Camera Heater Malfunction (C1AAE00)
DESCRIPTION
The forward recognition camera controls the current to the forward recognition hood with heater sub-assembly.
C1AAE00 is stored when the forward recognition camera detects a forward recognition hood with heater sub-assembly operation circuit malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1AAE00 | Front Recognition Camera Heater Malfunction | When 10 seconds elapse after turning the power switch on (IG), the forward recognition camera determines that one of the following conditions is met
|
|
| Vehicle Condition | ||||
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Detection condition | 10 seconds elapse after turning the power switch on (IG) | ○ | ○ | ○ |
| Malfunction status | Supply fault in hot wire circuit | ○ | - | - |
| Open circuit in hot wire circuit | - | ○ | - | |
| Short to GND in hot wire circuit | - | - | ○ | |
| Malfunction duration | 1 second or more continuously | 5 seconds or more continuously | 5 seconds or more continuously | |
| Number of trips | 1 trip | 1 trip | 1 trip | |
HINT:
The DTC is output when a combination of any of the above conditions are met.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
HINT:
Forward recognition camera adjustment can be performed by using either "One Time Recognition" or "Sequential Recognition".
One Time Recognition:
Click here
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Sequential Recognition:
Click here
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the conditions are not met, the system cannot detect the malfunction.
Click here
(c) Recheck for DTCs and check that no DTCs are output.
Click here
OK:
DTC C1AAE00 is not output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
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| 2. | CHECK FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY |
| (a) Turn the power switch off. |
|
(b) Disconnect the T19 forward recognition with heater hood sub-assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| 1 (IG1) - 2 (HTR) | Power switch off | 28.5 to 31.5 Ω |
| NG | | REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY - BATTERY) |
| (a) Disconnect the forward recognition with heater hood sub-assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| T19-1 (IG1) - Body ground | Power switch on (IG) | 8 to 16 V |
| Power switch off | Below 1.5 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the T19 forward recognition with heater hood sub-assembly connector.
(b) Disconnect the T18 forward recognition camera connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| T19-2 (HTR) - T18-1 (HTR) | Always | Below 1 Ω |
| T19-2 (HTR) or T18-1 (HTR) - Body ground | Always | 10 kΩ or higher |
(d) Reconnect the T18 forward recognition camera connector.
(e) Reconnect the T19 forward recognition with heater hood sub-assembly connector.
| OK | | REPLACE FORWARD RECOGNITION CAMERA |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Utility
UTILITY NOTICE:
If the forward recognition camera has been replaced with a new one or the windshield glass has been removed and installed, it is necessary to perform forward recognition camera adjustment. HINT: Forward recognition camera adjustment can be performed by using either "One Time Recog
