DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the ECM via the CAN communication system.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
C1437 |
Lost Communication with ECM |
When voltage at terminal +BS is 10 to 17.4 V and vehicle speed is 15 km/h (9 mph) or more, data cannot be sent to ECM continuously for 2 seconds or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information (See page ).
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) |
(a) Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to the DTC (See page ).
ABS/VSC/TRAC
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
EFI Communication Open |
EFI communication open detection |
Normal or Error |
Normal |
Error: Momentary interruption |
EFI Communication Invalid |
ECM communication invalid detection |
Normal or Error |
Normal |
Error: Invalid |
HINT:
Perform the above inspection before removing the sensor and connector.
OK:
Normal (There are no momentary interruptions.)
NG |
CHECK CAN COMMUNICATION SYSTEM |
|
2. |
RECONFIRM DTC |
(a) Clear the DTCs (See page ).
(b) Turn the ignition switch off.
(c) Start the engine.
(d) Drive the vehicle at a speed of 15 km/h (9 mph) or more for 10 seconds or more.
(e) Check that no CAN communication system DTC is output (See page ).
(f) Check if the same DTC is recorded (See page ).
Result
Result |
Proceed to |
---|---|
DTC C1437 is not output |
A |
DTC C1437 is output |
B |
CAN communication system DTC is output |
C |
A |
USE SIMULATION METHOD TO CHECK |
B |
REPLACE BRAKE ACTUATOR ASSEMBLY |
C |
CHECK CAN COMMUNICATION SYSTEM |
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Sending Malfunction (Navigation to APGS) (U0073,U0100,U0140,U0155)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the CAN communication circuit.
DTC No.
DTC Detection Condition
Trouble Area
U0073
CAN bus connection error
CAN communication system
U0100
...
Steering wheel
The steering wheel can be adjusted to a comfortable position.
Hold the steering wheel and press the lever down.
Adjust to the ideal position by moving the steering wheel horizontally and vertically.
After adjustment, pull the lever up to secure the steering wheel.
CAUTION
■Caution whi ...