MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0900

DTC Code	DTC Name
P0900	Clutch Actuator Circuit

DESCRIPTION

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

DTC No.	DTC Detection Condition	Trouble Area
P0900	The TCM detects the following conditions: (1-trip detection logic) Clutch motor is not energized. Voltages of clutch motor terminal (MCL+ or MCL-) is less than 0.5 V1, or more than threshold2 for 0.5 seconds.	Clutch actuator assembly (clutch motor) Short in clutch motor circuit TCM
The TCM 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 TCM
The TCM 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*4 for 0.5 seconds.

DTC No.

DTC Detection Condition

Trouble Area

P0900

The TCM detects the following conditions:

(1-trip detection logic)

Clutch motor is not energized.
Voltages of clutch motor terminal (MCL+ or MCL-) is less than 0.5 V*1, or more than threshold*2 for 0.5 seconds.

Clutch actuator assembly (clutch motor)
Short in clutch motor circuit
TCM

The TCM 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
TCM

The TCM 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*4 for 0.5 seconds.

*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 the clutch motor to operate, the ECU sets the DTC.

WIRING DIAGRAM


*a	CLUTCH ACTUATOR ASSEMBLY (Clutch Motor)

CAUTION / NOTICE / HINT

Note

In clutch actuator assembly replacement, perform Initialization and Learning of the multi-mode manual transaxle system after installing the actuator Click here. If the actuator is installed without the initialization and learning, it may cause driving performance degradation or system component breakage.

PROCEDURE

INSPECT CLUTCH ACTUATOR ASSEMBLY

Text In Illustration

*a
Component without harness connected

(Clutch Actuator Assembly)

Disconnect the B60 clutch motor connector.

Text In Illustration
*a	Component without harness connected (Clutch Actuator Assembly)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
1 - 2	Always	0.1 to 100 Ω

REPLACE CLUTCH ACTUATOR ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (CLUTCH ACTUATOR ASSEMBLY - TCM)

Disconnect the A46 TCM connector.
Disconnect the B60 clutch actuator assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
A46-5 (MCL-) - B60-1	Always	Below 1 Ω
A46-6 (MCL+) - B60-2	Always	Below 1 Ω
A46-5 (MCL-) - Body ground	Always	10 kΩ or higher
A46-6 (MCL+) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE TCM
1. Replace the TCM Click here.
NEXT
PERFORM INITIALIZATION
1. Perform the initialization and learning for multi-mode manual transaxle system Click here.
NEXT
END
REPLACE CLUTCH ACTUATOR ASSEMBLY
1. Replace the clutch actuator assembly Click here.
NEXT
PERFORM INITIALIZATION
1. Perform the initialization and learning for multi-mode manual transaxle system Click here.
NEXT
END