Lexus NX: ECU Malfunction (C1614)
DESCRIPTION
This DTC is stored if the parking assist ECU judges that there is an internal malfunction as a result of its self check.
HINT:
The parking assist ECU stores different types of information during initialization. If the parking assist ECU cannot read the stored information when activated, the parking assist ECU judges that there is an internal malfunction and stores this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1614 | ECU Malfunction |
| Parking assist ECU |
CAUTION / NOTICE / HINT
NOTICE:
-
When "!" mark is displayed on the parking assist ECU after the cable is disconnected from the negative (-) auxiliary battery terminal, correct the steering angle neutral point.
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-
Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the panoramic view monitor system may be needed.
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PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (PARKING ASSIST ECU STATUS) |
(a) Use the Data List to check if the parking assist ECU status is functioning properly.
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| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Main CPU Forced Termination Detection Record | A history item indicating that the main CPU did not enter standby status within 15 seconds of turning the power switch off and a forced end was applied | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Main CPU Abnormal Response Record | A history item indicating that the main CPU became unresponsive in normal status | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Main CPU Abnormal Reset Record | A history item indicating that the main CPU was reset, although the power switch was not turned off in normal status | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Image Processing IC Written Protect Record | A history item indicating that the image processing IC memory was write protected | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Image Processing IC Initialized Malfunction Record | A history item indicating that the image processing IC memory was not initialized | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Main EEPROM Access Status | Main EEPROM access status | OK/NG | OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal | - |
| Sub EEPROM Access Status | Sub-EEPROM access status | OK/NG | OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal | - |
| System Power Supply Voltage Malfunction Record | A history item indicating an abnormal generated-voltage value from the system power source | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Main CPU Starting Malfunction Record | A history item indicating that the main CPU did not start | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| CAN CPU Boot Malfunction Record | A history item indicating that the CPU controlling the input and output of the information obtained via the CAN communication system did not start and the information could not be retrieved | Unrec/Rec | Unrec: Parking assist ECU is normal Rec: Parking assist ECU is abnormal | - |
| Tester Display |
|---|
| Main CPU Forced Termination Detection Record |
| Main CPU Abnormal Response Record |
| Main CPU Abnormal Reset Record |
| Image Processing IC Written Protect Record |
| Image Processing IC Initialized Malfunction Record |
| Main EEPROM Access Status |
| Sub EEPROM Access Status |
| System Power Supply Voltage Malfunction Record |
| Main CPU Starting Malfunction Record |
| CAN CPU Boot Malfunction Record |
| Result | Proceed to |
|---|---|
| OK is displayed for all items | A |
| NG is displayed | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
|
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| 2. | CHECK FOR DTC |
(a) Clear the DTCs.
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(b) Check for DTCs.
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OK:
DTC C1614 is not output.
HINT:
- If DTC C1614 is output, perform the procedure to allow the parking assist ECU to store the vehicle information again.
- If DTC C1614 is still output after performing the procedure to make the parking assist ECU store the vehicle information 3 times, replace the parking assist ECU.
- If DTC C1614 is output frequently, replace the parking assist ECU even though the DTC is not output when rechecking for DTCs.
| OK | | END |
| NG | | REPLACE PARKING ASSIST ECU |
READ NEXT:
Back Camera Power Supply Failure (C1621)
DESCRIPTION This DTC is stored if the parking assist ECU determines that the input/output signal communication with the rear television camera assembly is abnormal. DTC No. Detection Item DTC D
Open or Short Circuit in Back Camera Signal (C1622)
DESCRIPTION This DTC is stored if the parking assist ECU judges as a result of its self check that the signals or signal lines between the parking assist ECU and the rear television camera assembly ar
Open or Short in Steering Angle Sensor +B (C1625)
DESCRIPTION This DTC is stored if the parking assist ECU receives a signal via CAN communication from the steering sensor that indicates a power supply system problem. DTC No. Detection Item DT
SEE MORE:
EPB High Temperature (C13AA)
DESCRIPTION If the electric parking brake is used continuously, the parking brake actuator assembly overheat prevention stops the system. This DTC is stored to protect the system and is not a malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note C13AA
Parts Location
PARTS LOCATION ILLUSTRATION *1 FUEL INJECTOR ASSEMBLY *2 FUEL PUMP *3 FUEL SENDER GAUGE ASSEMBLY *4 EFI-MAIN RELAY *5 EFI-MAIN NO. 2 RELAY *6 ECM *7 FUEL PUMP CONTROL ECU ASSEMBLY *8 NO. 1 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY - EFI-MAIN NO. 1 FU
