C1521

DTC C1521 POWER STEERING MOTOR MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detection Condition:

Motor temp. sensor is built in the vane pump assembly with motor and detects the motor brash holder temperature. If the motor brash holder temperature has become higher than 200°C (390°F) continuously for longer than 0.1 second, the system stops for a time and returns if the temperature has become lower than 150°C (302°F) for longer than 1 second.

Fail safe function:

C1521/21: If vane pump assembly with motor detects the malfunction of the overheating of the motor, vane pump assembly with motor stops the motor from operating.

C1522/22: If there is short circuit in motor temperature sensor circuit, the vane pump assembly with motor prohibits the motor from operating.

C1523/23: If vane pump assembly with motor detects the malfunction of over current to the vane pump assembly with motor, vane pump assembly with motor stops EHPS system.

Wiring Diagram:

Step 1 - 2:

Step 3 - 5:

Step 6:

INSPECTION PROCEDURE