Error P1700 on Nissan Teana: decoding, diagnosis and repair

Fault code P1700 on Nissan Teana (especially models J31 And J32 with automatic transmission RE0F10A/RE0F10D) is one of the most insidious transmission errors, which can manifest itself in different ways: from twitching when changing gears to a complete refusal of the gearbox to engage gears. Unlike typical sensor errors, P1700 signals problems in electronic transmission control module (TCM) or communication circuits with ECU engine. You cannot ignore it - when driving for a long time with this error, the risk of failure of the solenoids or valve body increases significantly.

In this article we will look at: Teana which years are most prone to error, which symptoms should be wary, and - most importantly - step-by-step steps for diagnosis and repair, including checking the wiring, resetting adaptations and changing the automatic transmission oil. Let us dwell separately on a common myth about “curing” error P1700 by simply flashing the TCM - why does this only work in 20% of cases and when intervention in the “brains” of the box is really required.

What does error P1700 mean on Nissan Teana

Code P1700 in the self-diagnosis system Nissan stands for "Transmission control circuit malfunction" (Transmission Control System Malfunction). Unlike errors like P0700 (general automatic transmission failure) or P0730 (incorrect gear ratio), P1700 indicates problems in electronic part:

• 🔌 Open or short circuit in the wiring harness between TCM (automatic transmission control unit) and ECU engine.
• 🖥️ Firmware failure in TCM (often after disconnecting the battery or unsuccessful software update).
• 🔋 Low voltage in the on-board network (less 11.5V), leading to malfunctions of the solenoids.
• 🛠️ Mechanical damage connectors TCM or contact corrosion.

On Teana J31/J32 error P1700 often accompanied additional codes: P0705 (selector lever position sensor malfunction), P0715 (input shaft sensor error), P0720 (output shaft sensor malfunction).

If in memory ECU there is at least one of these codes, the problem most likely lies in sensors or wiring, and not in itself TCM.

⚠️ Attention: On Teana with mileage over 150 thousand km error P1700 may mask wear valve body or solenoids. If after resetting the error it returns within 50–100 km, it is required in-depth automatic transmission diagnostics with oil pressure check.

Reasons for the appearance of P1700: from simple to complex

Experts highlight 5 main reasons errors P1700 on Nissan Teana, ranking them by frequency of occurrence:

1. Problems with wiring or connectors (40% of cases) - oxidation of contacts on TCM, breaks in the harness under the gas pedal or near the battery.
2. Automatic transmission adaptation failure (25%) - after changing the oil, disconnecting the battery or repairing the gearbox.
3. TCM malfunction (20%) - failure of microcircuits or damage to the board (often due to power surges).
4. Low voltage on-board network (10%) - weak battery or faulty generator.
5. Mechanical faults of automatic transmission (5%) - wear of solenoids, valve body or couplings.

On Teana J31 (2003–2008) more often to blame wiring - the harness under the gas pedal rubs against the bracket, and on J32 (2008–2013) common TCM firmware failures after disconnecting the battery. If the error appears after changing the automatic transmission oil, in 90% of cases it will help reset adaptations (procedure described below).

Symptoms of error P1700: how they manifest themselves in practice

Error P1700 rarely appears “on its own” - it is usually preceded by characteristic features, which the driver can notice in advance:

If on the dashboard Teana caught fire "Check Engine" and at the same time "AT" light flashes (automatic transmission), this 100% P1700 error symptom. In this case the box usually goes into emergency mode (only 3rd gear is engaged) to prevent damage to the mechanisms.

Critical symptom: if when driving at speed 60–80 km/h do you feel strong tremors and hear metallic grinding out of the box - stop immediately and don't start the engine! This may indicate destruction of the planetary series due to lack of oil pressure.

Diagnosing error P1700: step-by-step instructions

To pinpoint the cause P1700, follow this algorithm (from simple to complex):

Check battery voltage (should be ≥12.6V)

Read errors by scanner (not only P1700, but also related ones)

Inspect TCM connectors for oxidation and damage.

Check the CAN bus circuit between the ECU and TCM

Reset automatic transmission adaptation (if the error appeared after changing the oil) -->

Step 1. Checking the on-board voltage

Connect the multimeter to the battery terminals when muffled engine The voltage must be at least 12.6V. If less - charge the battery or check the generator. When starting the engine, the voltage should rise to 13.8–14.4V.

Step 2: Reading Errors

Use a diagnostic scanner (eg Launch X431 or Autel MaxiCOM) for reading all errors, and not just P1700. Pay special attention to:

• 🔧 U1000 - loss of connection with ECU (problems with the CAN bus).
• 🔧 P0700 — general automatic transmission failure (may indicate mechanical failures).
• 🔧 P0603 - memory error TCM (reflashing required).

Step 3: Check TCM Connectors

On Nissan Teana J31/J32 block TCM located under the hood, next to the battery (on J31) or in the cabin, under the center console (on J32). Disconnect the connector and check:

• 🔍 Availability oxidation on the contacts (clean only with a special spray, not sandpaper!).
• 🔍 Integrity clamps - if they are broken, the connector may come off due to vibration.
• 🔍 Condition wires on bends (often rubbing against the body).

How to fix error P1700: repair methods

Depending on the reason, there is 4 main methods elimination P1700:

1. Reset automatic transmission adaptations

If the error appears after oil changes or battery disconnection, the procedure for resetting adaptations will help. For Nissan Teana it is done like this:

1. Warm up the engine to operating temperature (80–90°C).
2. Move the automatic transmission selector to position P.
3. Turn off the ignition, remove the terminal from the battery at 15 minutes.
4. Reconnect the terminal, start the engine and let it idle 5 minutes.
5. Drive 10–15 km in a gentle mode (without sudden accelerations) so that the box “learns” again.

Important! If the error returns after a reset, the problem is deeper - diagnostics are required TCM or wiring.

2. Repair or replace TCM

If TCM faulty (for example, after a power surge or moisture), there are two options:

• 🔧 Flashing — helps in 30–40% of cases if there is a software failure. Cost: 3 000–5 000 ₽.
• 🔧 Replacement with new/used one - more reliable, but more expensive (15 000–25 000 ₽). When buying used TCM be sure to check compatibility VIN code!

3. Wiring repair

If the problem is in the harness, proceed as follows:

1. Ring the circuit tester between TCM And ECU (the diagram is in the manual).
2. Pay attention massive wires - on Teana J31 they often oxidize under the battery.
3. If you find a break - solder, do not twist! Twists can cause repeated breakage.

4. Changing the oil and cleaning the valve body

If the error is accompanied jerkily or switching delays, the problem may be contaminated oil or worn solenoids. For Teana recommended:

• 🛢️ Oil: Nissan Matic S (original) or Idemitsu ATF Type-J.
• 🔧 Replacement volume: 8–9 liters (complete replacement with flushing).
• 🔧 Frequency: every 60,000 km (or 40,000 km under severe operating conditions).

⚠️ Attention: If found in oil metal particles or does it smell burning, the box is already worn out! In this case, changing the oil can only make the problem worse — opening of the automatic transmission is required.

Prevention of error P1700: how to avoid recurrence

To make a mistake P1700 not returned, follow these rules:

• 🔋 Monitor the voltage of the on-board network - a weak battery or faulty alternator can burn out TCM.
• 🛢️ Change the automatic transmission oil every 60,000 km — contaminated oil kills solenoids.
• 🔌 Do not disconnect the battery unless necessary — every power reset disrupts adaptations.
• 🚗 Avoid sudden starts and towing — this increases the load on the valve body.

On Teana J32 with mileage over 100,000 km recommended every 20,000 km reset automatic transmission adaptations (the procedure is described above). This will help avoid “sticking” of the solenoids and extend the life of the box.

Frequently asked questions about error P1700 on Nissan Teana