DESCRIPTION
The power steering ECU supplies current to the power steering motor through the motor circuit.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1522 |
Motor current sensor malfunction |
|
C1523 |
Excessively large current deviation |
|
C1524 |
Short (or open) in motor circuit or abnormal voltage or current in motor circuit |
|
C1555 |
Motor relay failure |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU and steering column assembly have been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page ).
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (MOTOR VOLTAGE) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / EMPS / Data List.
(f) Select the items "Motor Terminal Volt(U)", "Motor Terminal Volt(V)" and "Motor Terminal Volt(W)" in the Data List and read the value displayed on the Techstream.
EMPS
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Motor Terminal Volt(U) |
Motor terminal voltage (U phase)/ Min.: 0 V Max.: 46.667 V |
During steering operation, value changes within 4 to 46 V range |
The engine is running and steering wheel is being turned. |
Motor Terminal Volt(V) |
Motor terminal voltage (V phase)/ Min.: 0 V Max.: 46.667 V |
During steering operation, value changes within 4 to 46 V range |
The engine is running and steering wheel is being turned. |
Motor Terminal Volt(W) |
Motor terminal voltage (W phase)/ Min.: 0 V Max.: 46.667 V |
During steering operation, value changes within 4 to 46 V range |
The engine is running and steering wheel is being turned. |
Result |
Proceed to |
---|---|
During steering operation, value changes within 4 to 46 V range |
A |
During steering operation, voltage is not generated |
B |
A |
REPLACE POWER STEERING ECU |
B |
REPLACE STEERING COLUMN ASSEMBLY |
Inspection
INSPECTION
PROCEDURE
1. INSPECT GENERATOR PULLEY WITH CLUTCH
(a) Hold the center of the pulley, and confirm that the outer ring turns
counterclockwise and does not turn clockwise.
Text in Illustration
*1
...
Lost Communication with AFS ECU (U0182)
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
U0182
No communication from the AFS ECU continues.
AFS ECU branch wire or connector
Power source circuit of AFS E ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) The power back door ECU (power back door motor unit)*1 or back door closer
ECU (multiplex network door ECU)*2 controls the vehicle's back door closer system
functions. Back door closer system data and Diagnostic Tr ...