DESCRIPTION
The forward recognition camera controls the flow of current to the forward recognition with heater hood sub-assembly.
If the forward recognition camera detects a malfunction in the forward recognition with heater hood sub-assembly circuit, it will store this DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
C1AAE00 | Front Recognition Camera Heater Malfunction | Either of the following conditions is met after 10 seconds have elapsed since the engine switch was turned to on (IG):
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.
One Time Recognition: Click here
Sequential Recognition: Click here
PROCEDURE
1. | CHECK FOR DTCs |
(a) Clear the DTCs.
Chassis > Front Recognition Camera > Clear DTCs(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Chassis > Front Recognition Camera > Trouble Codes Result | Proceed to |
---|---|
DTC C1AAE00 is not output | A |
DTC C1AAE00 is output | B |
A | ![]() | USE SIMULATION METHOD TO CHECK |
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2. | INSPECT FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY |
*a | Component without harness connected (Forward Recognition with Heater Hood Sub-assembly) |
(a) Disconnect the U20 forward recognition with heater hood sub-assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
1 (IG1) - 2 (HTR) | Engine switch off | 28.5 to 31.5 Ω |
NG | ![]() | REPLACE FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY |
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3. | CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE) |
*a | Front view of wire harness connector (to Forward Recognition with Heater Hood Sub-assembly) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
U20-1 (IG1) - Body ground | Engine switch on (IG) | 8 to 16 V |
Engine switch off | Below 1.5 V |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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4. | CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the U14 forward recognition camera connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
U20-2 (HTR) - U14-1 (HTR) | Always | Below 1 Ω |
U20-2 (HTR) or U14-1 (HTR) - Body ground | Always | 10 kΩ or higher |
OK | ![]() | REPLACE FORWARD RECOGNITION CAMERA |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Can Communication System: Open in Bus 2 Main Bus Line
DESCRIPTION There may be an open circuit in one of the bus 2 main lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the network gateway ECU is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 18 (CA4H) and 17 (CA4L) of network gateway ECU is 70 Ω or h ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Road Sign Assist System: Terminals Of Ecu
TERMINALS OF ECU CHECK FORWARD RECOGNITION CAMERA NOTICE:
DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
Do not apply excessive force to the forward recognition camera conn ...