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 |
Installation
INSTALLATION
PROCEDURE
1. INSTALL STARTER ASSEMBLY
(a) Install the starter with the 2 bolts.
Torque:
37 N·m {377 kgf·cm, 27 ft·lbf}
(b) Connect the starter connector.
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE DISC INSIDE DIAMETER
(a) Using a brake drum gauge or an equivalent tool, measure the inside
diameter of the disc.
Standard inside diameter of a new disc:
190 mm (7.48 in.)
Maximum inside diamete ...
Short in Passenger Side Airbag Variable Vent Hole Squib Circuit (B181A/7A-B181D/7A)
DESCRIPTION
The passenger side airbag variable vent hole squib circuit consists of the center
airbag sensor assembly and front passenger airbag assembly.
The center airbag sensor assembly uses this circuit to deploy the airbag when
deployment conditions ...