DTC    C1524/24    Motor Circuit Malfunction


DESCRIPTION

The power steering ECU supplies the current to the power steering motor through the motor circuit.

DTC No.
DTC Detection Condition
Trouble Area
C1524/24
Short (or open) in motor circuit or abnormal voltage or current in motor circuit.
  1. Steering column assembly
  2. Power steering ECU

WIRING DIAGRAM


C117915E01


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM
  1. Connect a Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Chassis / EMPS / Data List.

  1. Select the item "Motor Actual Current" and "Command Value Current" in the Data List and read the value displayed on the Techstream.


Standard current: 
Data List Item
Steering Position
(Left Turned)
Steering Position
(Center)
Steering Position
(Right Turned)
Motor Actual Current
10 A to 55 A
-1 A to +1 A
-55 A to -10 A
Command Value Current
55 A
0 A
-55 A

HINT:
The current changes when steering wheel is turned.


OK
CHECK INTERMITTENT PROBLEMS (Click here)
NG


2.INSPECT POWER STEERING ECU
F046434E01
  1. Turn the ignition switch to ON.

  1. Measure the voltage.

    Standard voltage:
    Tester Connection
    Condition
    (Steering Position)
    Specified Condition
    M1 (b1-1) - PGND (A19-2)
    Turned to right
    Below 1 V
    M1 (b1-1) - PGND (A19-2)
    Turned to left
    11 to 14 V
    M2 (b1-2) - PGND (A19-2)
    Turned to right
    11 to 14 V
    M2 (b1-2) - PGND (A19-2)
    Turned to left
    Below 1 V


OK
Go to step 4
NG


3.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BODY GROUND)
F046438E01
  1. Disconnect the connector from the power steering ECU.

  1. Measure the resistance and the voltage.

Standard:
Tester Connection
Condition
Specified Condition
PGND (A19-2) - Body ground
Always
Below 1 Ω
PIG (A19-1) - Body ground
Ignition switch on.
11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT STEERING COLUMN ASSEMBLY (POWER STEERING MOTOR)
F046435E01
  1. Disconnect the connector from the power steering ECU.

  1. Measure the resistance.

Standard resistance:
Tester Connection
Condition
Specified Condition
M1 (b1-1) - M2 (b1-2)
Always
0.08 to 0.15 Ω
M1 (b1-1) - Body ground
Always
1 MΩ or higher
M2 (b1-2) - Body ground
Always
1 MΩ or higher


NG
REPLACE STEERING COLUMN ASSEMBLY (Click here)
OK

REPLACE POWER STEERING ECU (Click here)