Lexus ES: Communication Error From Clearance Sonar ECU to VSC (C164B)
DESCRIPTION
The electronically controlled brake system receives parking support brake system information from the clearance warning ECU assembly via CAN communication. When it is determined that there is a communication error between the skid control ECU and clearance warning ECU assembly, DTC C164B is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C164B | Communication Error From Clearance Sonar ECU to VSC | A communication error between the skid control ECU and clearance warning ECU assembly is detected |
|
CAUTION / NOTICE / HINT
NOTICE:
-
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
.gif)
-
After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).
Click here
PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
HINT:
After turning the power switch from off to on (IG), wait 4 seconds or more before checking for DTCs.
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:
- If DTC C164B is not output after clearing the DTCs, an intermittent communication error between the clearance warning ECU assembly and skid control ECU is suspected.
-
If DTC C164B 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.
Click here
| Result | Proceed to |
|---|---|
| DTC C164B is output | A |
| DTC C164B is not output | B |
| B |  | USE SIMULATION METHOD TO CHECK |
|
| 2. | CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
Chassis > ABS/VSC/TRAC > Trouble Codes| Result | Proceed to |
|---|---|
| DTC is not output | A |
| DTC is output | B |
| B | | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
|
| 3. | REPLACE CLEARANCE WARNING ECU ASSEMBLY |
(a) Replace the clearance warning ECU assembly with a new or known good one.
Click here
|
| 4. | 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 Codes| Result | Proceed to |
|---|---|
| DTC C164B is output | A |
| DTC C164B is not output | B |
| A | | REPLACE SKID CONTROL ECU |
| B | | END (CLEARANCE WARNING ECU ASSEMBLY DEFECTIVE) |
READ NEXT:
Wheel Speed Sensor Malfunction (C164D)
DESCRIPTION This DTC is stored when the clearance warning ECU assembly receives a wheel speed sensor (front speed sensor RH or front speed sensor LH, rear speed sensor RH or rear speed sensor LH) abno
Stop Switch Circuit Malfunction (C164E)
DESCRIPTION When a stop light switch assembly circuit malfunction signal sent from the electronically controlled brake system is detected by the clearance warning ECU assembly, DTC C164E is stored.
Brake Hydraulic Pressure Malfunction (C164F)
DESCRIPTION When a malfunction signal sent from the skid control ECU via CAN communication is detected by the clearance warning ECU assembly, DTC C164F is stored. DTC No. Detection Item DTC Det
SEE MORE:
Removal
REMOVAL PROCEDURE 1. CHANGE POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM SETTINGS (for Power Tilt and Power Telescopic Steering Column) Click here 2. REMOVE LOWER STEERING COLUMN COVER SUB-ASSEMBLY NOTICE: Removing the lower steering column cover sub-assembly in the incorrect order wil
Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Signal Invalid (P060629)
DESCRIPTION The battery ECU assembly monitors its internal operation and will store these DTCs when it detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P060629 Hybrid/EV Battery Energy Control Module Processor to Mon
