Lexus ES: G Sensor Failure (C1647)
DESCRIPTION
The clearance warning sonar ECU assembly communicates with the airbag sensor assembly (yaw rate and acceleration sensor) via CAN communication, and if it is determined that the airbag sensor assembly (yaw rate and acceleration sensor) is malfunctioning, DTC C1647 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1647 | G Sensor Failure | Airbag sensor assembly malfunction | Electronically controlled brake system |
CAUTION / NOTICE / HINT
NOTICE:
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After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).
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PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes(b) Clear the DTCs according to the screen on the Techstream.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs(c) Recheck for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble CodesHINT:
- DTC C1647 is stored when a malfunction signal sent from the electronically controlled brake system is detected.
- If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C1647 will not be output again.
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If DTC C1647 is output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.
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| Result | Proceed to |
|---|---|
| DTC C1647 is output | A |
| DTC C1647 is not output | B |
| A | .gif) | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
| B | | USE SIMULATION METHOD TO CHECK |
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Outside Air Temperature Sensor (C1652)
DESCRIPTION When a malfunction signal sent from the air conditioning system via CAN communication is detected by the clearance warning ECU assembly, DTC C1652 is stored. DTC No. Detection Item
Calibration
CALIBRATION NOTICE: When any of the following parts have been replaced, perform adjustment shown in the following table. If not, the parking support brake system may not operate correctly. PRECAUTION
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE PARKING SUPPORT BRAKE SYSTEM (a) Customizing with the Techstream. NOTICE:
When the customer requests a change in a function, first make sure that the function can be
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Operation Check
OPERATION CHECK CHECK AUTO OPERATION FUNCTION (FOR SLIDING ROOF) NOTICE:
Make sure that initialization has been completed before performing this inspection.
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The sliding roof auto operation function can be customized. Make sure that the auto operation function is ON.
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Parts Location
PARTS LOCATION ILLUSTRATION *1 ECM *2 NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - INJ FUSE *3 IGNITION COIL ASSEMBLY *4 SPARK PLUG
