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P1778 Infiniti Code - Step Motor Function

- Code Popularity: 4,300 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1778 Infiniti?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Step Motor
  • Step Motor harness is open or shorted
  • Step Motor circuit poor electrical connection
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How to Fix the DTC P1778 Infiniti?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1778 Infiniti code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1778 Infiniti Description

The step motor's 4 aspects of ON/OFF change according to the signal from the Transmission Control Module (TCM). As a result, the flow of line pressure to the primary pulley is changed and the pulley ratio is controlled. This diagnosis item detects when the electrical system is OK, but the mechanical system is NG. This diagnosis item detects when the state of the changing the speed mechanism in the unit does not operate normally. The Diagnostic Trouble Code (DTC) will set when there is a great difference between the number of steps for the stepping motor and for the actual gear ratio.

OBDII Code P1778 Infiniti - Step Motor Function - AutoCodes.com
P1778 Infiniti Code - Step Motor Function

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Code P1778 Infiniti comments

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