Nissan Altima P1701 Transmission Control Module Power Supply

What is the P1701 Nissan Code?

The P1701 Nissan code is associated with the power supply to the Transmission Control Module (TCM). When the power supply to the TCM is interrupted, such as during the removal of the battery, the self-diagnostic memory function stops, leading to the detection of a malfunction. This triggers the Diagnostic Trouble Code (DTC) P1701.

Possible Causes

  1. Faulty Transmission Control Module (TCM)
  2. Open or shorted Transmission Control Module harness
  3. Poor electrical connection in the Transmission Control Module circuit

It’s essential to note that this list may not encompass all potential problems, and there could be other causes contributing to the issue.

How to Fix the P1701 Nissan Code?

Visual Inspection

To begin addressing the P1701 code, review the possible causes mentioned above and conduct a visual examination of the corresponding wiring harness and connectors. Look for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Factory Service Bulletin

There is a Factory Service Bulletin specifically addressing the P1701 code for all 2003–2010 Nissan vehicles equipped with the 5-Speed A/T RE5R05A Transmission. Owners of affected vehicles should refer to the 2003–2010 Nissan RE5R05A Transmission Factory Service Bulletin for additional guidance.

Cost to Diagnose

The cost to diagnose the P1701 Nissan code typically involves 1.0 hour of labor. However, actual rates may vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $75 and $150 per hour for diagnostics.

Symptoms of Code P1701 Nissan

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

Diagnosis Procedure

When dealing with the P1701 code, a systematic diagnosis procedure is essential. Follow the steps outlined in the Nissan Altima 2007-2012 Service Manual:

Step 1: TCM Power Source Check

  1. Turn ignition switch OFF.
  2. Disconnect TCM harness connector.
  3. Turn ignition switch ON.
  4. Check voltage between TCM harness connector terminals.

Step 2: TCM Ground Circuit Check

  1. Turn ignition switch OFF.
  2. Check continuity between TCM harness connector terminals and ground.

Step 3: TCM Power Circuit Check

  1. Turn ignition switch ON.
  2. Check voltage between TCM harness connector terminals and ground.

Step 4: Harness Checks

Inspect the harness between TCM and IPDM E/R and between TCM and the battery for continuity.

Step 5: Detect Malfunctioning Items

Check TCM connector pin terminals for damage or loose connections.

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