Lexus ES: Vehicle Speed Signal (C1541)
DESCRIPTION
The power steering ECU (rack and pinion power steering gear assembly) receives vehicle speed signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication. The ECU provides appropriate assist force in accordance with the vehicle speed based on the signals.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| C1541 | Vehicle Speed Signal | A vehicle speed signal malfunction is detected |
| EPS warning light: Comes on | The ECU judges the system has returned to normal | - |
CAUTION / NOTICE / HINT
NOTICE:
If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
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PROCEDURE
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check if DTC U0129 is output.
Chassis > EMPS > Trouble Codes| Result | Proceed to |
|---|---|
| DTC U0129 is not output. | A |
| DTC U0129 is output. | B |
| A | .gif) | GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
| B | | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
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Error in Matching of ECUs (C1567)
DESCRIPTION The power steering ECU (rack and pinion power steering gear assembly) determines whether an incompatible hybrid vehicle control ECU or skid control ECU (brake booster with master cylinder
SEE MORE:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the parking assist monitor system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS (a) Ask the customer about the problems and the co
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Click here (b) Measure the resistance according to the value(s) in the table
