P0900

DTC Code	DTC Name
P0900	Clutch Actuator Circuit

DESCRIPTION

The clutch actuator is operated by the transmission control ECU and engages and disengages the clutch by push rod movement of the clutch actuator. An electric motor moves the push rod, and the clutch stroke sensor, which is mounted on the clutch actuator assembly, detects the push rod position. The transmission control ECU monitors the electrical current and clutch motor output terminal voltage, and detects malfunctions in the clutch motor circuit.

DTC No.	DTC Detection Conditions	Trouble Areas
P0900	The transmission control ECU detects the following conditions: (1 trip detection logic) Clutch motor is not energized Clutch motor voltage is less than 0.5 V^1, or more than threshold^2for 0.5 seconds +BM voltage is 10 V or more	Clutch actuator assembly (clutch motor) Short in clutch motor circuit Transmission control ECU
P0900	The transmission control ECU detects the following conditions: (1 trip detection logic) Clutch motor is energized Target clutch motor current is more than 5A Actual clutch motor current is less than 1A^*3	Clutch actuator assembly (clutch motor) Open in clutch motor circuit Transmission control ECU
P0900	The transmission control ECU detects the following conditions: (1 trip detection logic) Clutch motor is not energized Difference between maximum and minimum voltages of clutch motor terminal (MCL+ or MCL-) is more than threshold^*4for 0.5 seconds +BM voltage is 10 V or more	Clutch actuator assembly (clutch motor) Open in clutch motor circuit Transmission control ECU

DTC No.

DTC Detection Conditions

Trouble Areas

P0900

The transmission control ECU detects the following conditions:

(1 trip detection logic)

Clutch motor is not energized
Clutch motor voltage is less than 0.5 V^*1, or more than threshold^*2for 0.5 seconds
+BM voltage is 10 V or more

Clutch actuator assembly (clutch motor)
Short in clutch motor circuit
Transmission control ECU

P0900

The transmission control ECU detects the following conditions:

(1 trip detection logic)

Clutch motor is energized
Target clutch motor current is more than 5A
Actual clutch motor current is less than 1A^*3

Clutch actuator assembly (clutch motor)
Open in clutch motor circuit
Transmission control ECU

P0900

The transmission control ECU detects the following conditions:

(1 trip detection logic)

Clutch motor is not energized
Difference between maximum and minimum voltages of clutch motor terminal (MCL+ or MCL-) is more than threshold^*4for 0.5 seconds
+BM voltage is 10 V or more

Clutch actuator assembly (clutch motor)
Open in clutch motor circuit
Transmission control ECU

^*1: A short between the clutch motor circuit and the body ground is suspected.
^*2: A short between the clutch motor circuit and the +B circuit is suspected.
^*3: An open in the clutch motor circuit is suspected. When the motor current does not flow to the ECU terminals despite the ECU ordering the clutch motor to operate, the ECU sets the DTC.
^*4: An open in the clutch motor circuit is suspected. When the difference is more than the threshold despite the ECU not ordering teh clutch motor to operate, the ECU sets the DTC.