Lexus ES: 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 "!" is displayed on the multi-display assembly after the cable is disconnected from the negative (-) 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 engine switch off and a forced end was applied | No/Yes | No: Parking assist ECU is normal Yes: Parking assist ECU is abnormal | - |
| Main CPU Abnormal Response Record | A history item indicating that the main CPU became unresponsive in normal status | No/Yes | No: Parking assist ECU is normal Yes: Parking assist ECU is abnormal | - |
| Main CPU Abnormal Reset Record | A history item indicating that the main CPU was reset, although the engine switch was not turned off in normal status | No/Yes | No: Parking assist ECU is normal Yes: Parking assist ECU is abnormal | - |
| Image Processing IC Written Protect Record | A history item indicating that the image processing IC memory was write protected | No/Yes | No: Parking assist ECU is normal Yes: Parking assist ECU is abnormal | - |
| Image Processing IC Initialized Malfunction Record | A history item indicating that the image processing IC memory was not initialized | No/Yes | No: Parking assist ECU is normal Yes: Parking assist ECU is abnormal | - |
| Main EEPROM Access Status | Main EEPROM access status | Normal/Abnormal | Normal: Parking assist ECU is normal Abnormal: Parking assist ECU is abnormal | - |
| Sub EEPROM Access Status | Sub-EEPROM access status | Normal/Abnormal | Normal: Parking assist ECU is normal Abnormal: 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 | No/Yes | No: Parking assist ECU is normal Yes: Parking assist ECU is abnormal | - |
| Main CPU Starting Malfunction Record | A history item indicating that the main CPU did not start | No/Yes | No: Parking assist ECU is normal Yes: 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 CAN communication did not start and the information could not be retrieved | No/Yes | No: Parking assist ECU is normal Yes: 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.
Chassis > Circumference Monitoring Camera Control Module > Clear DTCs(b) Check for DTCs.
Chassis > Circumference Monitoring Camera Control Module > Trouble CodesOK:
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 rear television camera assembly judges as a result of its self check that the signals or signal lines between the rear television camera assembly and parking assi
Open or Short Circuit in Back Camera Signal (C1622)
DESCRIPTION DTC C1622 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 a
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.
This DTC is stored if the r
SEE MORE:
Clearance Warning ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Clearance Warning ECU Communication Stop Mode Any of the following conditions are met:
Communication stop for "Clearance Warning (Intuitive Parking Assist)" is indicated on the "Communication Bus Check" screen of the Techstream.
Click h
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
*: Use the Techstream
Use the following procedure to troubleshoot the motor generator control system.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS
NEXT 3. CONNECT TECHSTREAM
