MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0920

DTC Code	DTC Name
P0920	Gear Shift Forward Actuator Circuit

DESCRIPTION

The shift and select actuator is operated by the TCM and changes the transaxle gear by the shift and select lever shaft movement. An electric motor (shift motor) moves the shift and select lever shaft in the shift direction, and the shift stroke sensor, which is mounted on the shift and select actuator assembly, detects the shift position. The TCM monitors the electrical current and shift motor output terminal voltage, and detects malfunctions in the shift motor circuit.

Text In Illustration
*a	Shift and Select Actuator Operation
*b	Shift Direction
*c	Select Direction

DTC No.	DTC Detection Condition	Trouble Area
P0920	The TCM detects the following conditions: (1-trip detection logic) Shift motor is not energized. Voltages of shift motor terminal (MSF+ or MSF-) is less than threshold1, or more than threshold2 for 0.5 seconds.	Shift and select actuator assembly (shift motor) Wire harness or connector TCM
The TCM detects the following conditions: (1-trip detection logic) Shift motor is energized. Target shift motor current is more than 5 A. Actual shift motor current is less than 1 A*3.
The TCM detects the following conditions: (1-trip detection logic) Shift motor is not energized. Difference between maximum and minimum voltages of shift motor terminal (MSF+ or MSF-) is more than threshold*4 for 0.5 seconds.

DTC No.

DTC Detection Condition

Trouble Area

P0920

The TCM detects the following conditions:

(1-trip detection logic)

Shift motor is not energized.
Voltages of shift motor terminal (MSF+ or MSF-) is less than threshold*1, or more than threshold*2 for 0.5 seconds.

Shift and select actuator assembly (shift motor)
Wire harness or connector
TCM

The TCM detects the following conditions:

(1-trip detection logic)

Shift motor is energized.
Target shift motor current is more than 5 A.
Actual shift motor current is less than 1 A*3.

The TCM detects the following conditions:

(1-trip detection logic)

Shift motor is not energized.
Difference between maximum and minimum voltages of shift motor terminal (MSF+ or MSF-) is more than threshold*4 for 0.5 seconds.

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

WIRING DIAGRAM


*a	Shift and Select Actuator Assembly (Shift Motor)

CAUTION / NOTICE / HINT

Note

In shift stroke sensor or shift and select actuator assembly replacement, perform the [Initialization and Learning] procedure (See page ) and [Synchronization Position Calibration] procedure Click here after installing the sensor or actuator assembly. If the sensor or actuator is installed without performing [Initialization and Learning] and [Synchronization Position Calibration], it may cause driving performance degradation or system component breakage.

PROCEDURE

INSPECT TCM (MSF TERMINAL VOLTAGE)

Turn the ignition switch to ON.

Text in Illustration
*a	Component with harness connected (TCM)

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
A46-4 (MSF+) - Body ground	Ignition switch ON	4.0 to 7.0 V
A46-3 (MSF-) - Body ground	Ignition switch ON	4.0 to 7.0 V

Turn the ignition switch off.

CHECK INTERMITTENT PROBLEMS Click here

CHECK TERMINAL CONDITION (TCM)

Disconnect the TCM connector.

Check the connections of the TCM connector.

OK
The TCM and wire harness connectors and connector terminals are connected securely and are not bent, rusted, or damaged.

CONNECT CORRECTLY

CHECK SHIFT MOTOR CIRCUIT

Text in Illustration
*a	Front view of wire harness connector (to TCM)

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
A46-4 (MSF+) - A46-3 (MSF-)	Always	Below 10 Ω
A46-4 (MSF+) - Body ground	Always	10 kΩ or higher
A46-3 (MSF-) - Body ground	Always	10 kΩ or higher

CHECK TERMINAL CONDITION (SHIFT MOTOR) Click here

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

CHECK TERMINAL CONDITION (SHIFT MOTOR)

Disconnect the shift motor connector.

Check the connections of the shift motor connector.

OK
The shift motor and wire harness connectors and connector terminals are connected securely and are not bent, rusted, or damaged.

CONNECT CORRECTLY

CHECK HARNESS AND CONNECTOR (TCM - SHIFT MOTOR)

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
A46-4 (MSF+) - B58-2	Always	Below 1 Ω
A46-3 (MSF-) - B58-1	Always	Below 1 Ω
A46-4 (MSF+) or B58-2 - Body ground	Always	10 kΩ or higher
A46-3 (MSF-) or B58-1 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT SHIFT AND SELECT ACTUATOR ASSEMBLY (SHIFT MOTOR)

Text In Illustration
*a	Component without harness connected (Shift and Select Actuator Assembly (Shift Motor))

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

Standard Resistance

Tester Connection	Condition	Specified Condition
1 - 2	Always	Below 10 Ω
1 - Body ground	Always	10 kΩ or higher
2 - Body ground	Always	10 kΩ or higher

CHECK INTERMITTENT PROBLEMS Click here

REPLACE SHIFT AND SELECT ACTUATOR ASSEMBLY
1. Replace the shift and select actuator assembly Click here.
NEXT
PERFORM INITIALIZATION
1. Perform the initialization and learning for multi-mode manual transaxle system Click here.
NEXT
END