Jatco JF011E Stepper Motor Testing - Revision history

Cartman02au at 02:39, 4 January 2026

2026-01-04T02:39:22Z

← Older revision		Revision as of 02:39, 4 January 2026
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	[[Category: CVT Transaxles]]		[[Category: CVT Transaxles]]
			[[Category: Technical Articles]]

Cartman02au at 03:13, 13 September 2020

2020-09-13T03:13:58Z

← Older revision		Revision as of 03:13, 13 September 2020
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	===Motor Movement===		===Motor Movement===
	[[Image:Jatco_Movement_Tester.png\|left\|500px\|thumb\|Stepper Motor Movement Tester Schematic]]		[[Image:Jatco_Movement_Tester.png\|left\|500px\|thumb\|Stepper Motor Movement Tester Schematic]]
	To check the movement of the stepper motor you will need to use a stepper motor controller. As the motor uses six wires, it can be driven in either unipolar or bipolar mode. You can create a simple stepper motor tester using an Arduino Uno, Duinotech XC4492 module and a power supply.		To check the movement of the stepper motor you will need to use a stepper motor controller. As the motor uses six wires, it can be driven in either unipolar or bipolar mode. You can create a simple stepper motor tester using an Arduino Uno, Duinotech XC4492 module (which uses the L298 chip) and a power supply.

	The transmission control module drives the motor at 5 volts so a 5 volt 0.5 amp power supply would be ideal. The motors will still work on a test bench at 12 volts but do seem to heat up a little.		The transmission control module drives the motor at 5 volts so a 5 volt 0.5 amp power supply would be ideal. The motors will still work on a test bench at 12 volts but do seem to heat up a little.

Cartman02au: /* Arduino Code */

2020-09-13T03:13:07Z

Arduino Code

← Older revision		Revision as of 03:13, 13 September 2020
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	void setup()		void setup()
	{		{
	// set the speed at 60 rpm:		// set the speed at 15 rpm:
	myStepper.setSpeed(15);		myStepper.setSpeed(15);
	// initialize the serial port:		// initialize the serial port:

Cartman02au at 00:39, 13 September 2020

2020-09-13T00:39:35Z

← Older revision		Revision as of 00:39, 13 September 2020
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	{{Clear}}		{{Clear}}
	====Arduino Code====		====Arduino Code====
	<syntaxhighlight>		<syntaxhighlight lang="C">
	// Include the Arduino Stepper Library		// Include the Arduino Stepper Library
	#include <Stepper.h>		#include <Stepper.h>

Cartman02au: Cartman02au moved page Jatco JF011 Stepper Motor Testing to Jatco JF011E Stepper Motor Testing without leaving a redirect: correct transmission model name

2020-09-13T00:32:35Z

Cartman02au moved page Jatco JF011 Stepper Motor Testing to Jatco JF011E Stepper Motor Testing without leaving a redirect: correct transmission model name

← Older revision	Revision as of 00:32, 13 September 2020
(No difference)

Cartman02au: add info on testing movement of stepper motor

2020-09-13T00:31:25Z

add info on testing movement of stepper motor

@@ Line 1: / Line 1: @@
-The Jatco JF011 CVT transmission (referred to by Mitsubishi as the [[F1CJA]] and W1CJA) is known to be less than robust.
+[[Image:F1CJA Valve Body.png|right|350px]]The Jatco JF011 CVT transmission, referred to by Mitsubishi as the [[F1CJA]] and W1CJA) is known for having a number of issues. One of the most common problems with the transmission is the failure of the stepper motor. When the stepper motor fails, you will receive a '''P1777''' error indicating an electrical malfunction with the stepper motor.
-One of the most common problem areas with the CVT is the stepper motor. Generally when the stepper motor fails you will receive a '''P1777''' error indicating an electrical malfunction with the stepper motor.
+The Mitsubishi service manual guides you through testing the motor windings and the wiring before recommending you replace the entire transmission valve body if the electrical side checks out OK.
-[[Image:F1CJA Valve Body.png|left|350px]]The stepper motor (6) is located on the top side of the transmission valve body and assists in selecting the gear ratio in use by moving the Ratio Control Link (8) which sets the position of the Ratio Control Valve (7).
+The stepper motor (6) is located on the top side of the transmission valve body and assists in selecting the gear ratio in use by moving the Ratio Control Link (8) which sets the position of the Ratio Control Valve (7).
-[[Image:F1CJA_Stepper_pinout.png|left|200px|thumb|Stepper motor pinout]]The stepper motor is a unipolar two winding type with six wires going into it. Each winding has three wires running into it, with the black wires at pins 2 and 5 being the ground.
+===Electrical Tests===
 To test the stepper motor windings, using a ohmmeter check the resistance between the following pins:<br>
@@ Line 15: / Line 18: @@
 and 6 = 30 ohms<br>
-If they are within say 5 ohms either side of these values the stepper motor is most likely OK.
+If the values are within 5 ohms of these, the stepper motor windings are OK.
-[[Image:Jatco_Movement_Tester.png|left|500px|thumb|Stepper Motor Movement Tester Schematic]]To check the movement of the stepper motor you will need to use a stepper motor controller. As the motor uses six wires, it can be driven in either unipolar or bipolar mode. You can create a simple stepper motor tester using an Arduino Uno, Duinotech XC4492 module and a power supply.
+  // step one revolution in the other direction:
 [[Category: CVT Transaxles]]

Cartman02au at 00:00, 12 September 2020

2020-09-12T00:00:29Z

← Older revision		Revision as of 00:00, 12 September 2020
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	If they are within say 5 ohms either side of these values the stepper motor is most likely OK.		If they are within say 5 ohms either side of these values the stepper motor is most likely OK.

			[[Image:Jatco_Movement_Tester.png\|left\|500px\|thumb\|Stepper Motor Movement Tester Schematic]]To check the movement of the stepper motor you will need to use a stepper motor controller. As the motor uses six wires, it can be driven in either unipolar or bipolar mode. You can create a simple stepper motor tester using an Arduino Uno, Duinotech XC4492 module and a power supply.

	[[Category: CVT Transaxles]]		[[Category: CVT Transaxles]]

Cartman02au at 10:29, 5 September 2020

2020-09-05T10:29:40Z

← Older revision		Revision as of 10:29, 5 September 2020
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	The Jatco JF011 CVT transmission (referred to by Mitsubishi as the [[F1CJA]] and W1CJA is known to be less than robust.		The Jatco JF011 CVT transmission (referred to by Mitsubishi as the [[F1CJA]] and W1CJA) is known to be less than robust.

	One of the most common problem areas with the CVT is the stepper motor. Generally when the stepper motor fails you will receive a '''P1777''' error indicating an electrical malfunction with the stepper motor.		One of the most common problem areas with the CVT is the stepper motor. Generally when the stepper motor fails you will receive a '''P1777''' error indicating an electrical malfunction with the stepper motor.

Cartman02au at 10:20, 5 September 2020

2020-09-05T10:20:18Z

← Older revision		Revision as of 10:20, 5 September 2020
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	[[Image:F1CJA Valve Body.png\|left\|350px]]The stepper motor (6) is located on the top side of the transmission valve body and assists in selecting the gear ratio in use by moving the Ratio Control Link (8) which sets the position of the Ratio Control Valve (7).		[[Image:F1CJA Valve Body.png\|left\|350px]]The stepper motor (6) is located on the top side of the transmission valve body and assists in selecting the gear ratio in use by moving the Ratio Control Link (8) which sets the position of the Ratio Control Valve (7).

	[[Image:F1CJA_Stepper_pinout.png\|left\|200px\|thumb\|Stepper motor pinout]]The stepper motor ~~has~~ two ~~windings and~~ six wires going into it. Each winding has three wires running into it, with the black wires at pins 2 and 5 being the ground.		[[Image:F1CJA_Stepper_pinout.png\|left\|200px\|thumb\|Stepper motor pinout]]The stepper motor is a unipolar two winding type with six wires going into it. Each winding has three wires running into it, with the black wires at pins 2 and 5 being the ground.

	To test the stepper motor windings, using a ohmmeter check the resistance between the following pins:<br>		To test the stepper motor windings, using a ohmmeter check the resistance between the following pins:<br>

Cartman02au: Created page with "The Jatco JF011 CVT transmission (referred to by Mitsubishi as the F1CJA and W1CJA is known to be less than robust. One of the most common problem areas with the CVT is t..."

2020-09-04T04:36:09Z

Created page with "The Jatco JF011 CVT transmission (referred to by Mitsubishi as the F1CJA and W1CJA is known to be less than robust. One of the most common problem areas with the CVT is t..."

New page

The Jatco JF011 CVT transmission (referred to by Mitsubishi as the [[F1CJA]] and W1CJA is known to be less than robust.

One of the most common problem areas with the CVT is the stepper motor. Generally when the stepper motor fails you will receive a '''P1777''' error indicating an electrical malfunction with the stepper motor.

[[Image:F1CJA Valve Body.png|left|350px]]The stepper motor (6) is located on the top side of the transmission valve body and assists in selecting the gear ratio in use by moving the Ratio Control Link (8) which sets the position of the Ratio Control Valve (7).

[[Image:F1CJA_Stepper_pinout.png|left|200px|thumb|Stepper motor pinout]]The stepper motor has two windings and six wires going into it. Each winding has three wires running into it, with the black wires at pins 2 and 5 being the ground.

To test the stepper motor windings, using a ohmmeter check the resistance between the following pins: 
1 and 2 = 15 ohms 
2 and 3 = 15 ohms 
1 and 3 = 30 ohms 
4 and 5 = 15 ohms 
5 and 6 = 15 ohms 
4 and 6 = 30 ohms 

If they are within say 5 ohms either side of these values the stepper motor is most likely OK.

[[Category: CVT Transaxles]]