Code
P1710
SCION
P — Powertrain
Shift solenoid circuit malfunction
Views:
UK: 0
EN: 4
RU: 1
AI status
Completed
Completed
100%
Causes
- Open or short in shift solenoid wiring (to ground or battery)
- Corroded, loose or damaged transmission connector(s)
- Failed shift solenoid valve (stuck or electrically open/shorted)
- Faulty transmission control module (TCM/ECU) or poor TCM ground
- Intermittent connection or damaged harness (chafing, heat damage)
- Internal valve body or transmission hydraulic fault (less common)
Symptoms
- Check Engine / transmission warning lamp illuminated
- Harsh, delayed, or erratic shifting
- Transmission stuck in limp/safe mode (limited gears)
- Reduced fuel economy or drivability problems
- Possible slipping or inability to engage certain gears
What to check
- Retrieve freeze frame and live data with a capable scan tool; note which solenoid is flagged
- Visually inspect transmission harness and connectors for damage, corrosion, or water intrusion
- Check battery voltage and TCM power/ground circuits
- Measure resistance of the suspect shift solenoid(s) at the connector (with harness disconnected)
- Perform wiggle test on harness/connector while monitoring for fault recurrence
- Scan for related codes (TCM, ABS, ECM) that may indicate broader electrical issues
Signal parameters
- Command: PWM/duty-cycle from TCM (varies 0–100%) when shifting
- Expected coil resistance: consult vehicle service manual; typical range often ~10–40 ohms depending on solenoid
- Supply voltage: ~12 V at power feed; switched ground or low-side driver by TCM
- No-load continuity to ground or battery should not be open/short (verify with multimeter)
Diagnostic algorithm
- Use a scan tool to confirm P1710 and identify which solenoid circuit is affected. Clear codes and attempt to re-run to verify repeatability.
- Visually inspect connectors, pins, and wiring from TCM to transmission for damage, corrosion, pin release, or water entry.
- With ignition OFF, disconnect transmission connector and measure solenoid resistance at the solenoid pins. Compare to service spec. Replace solenoid if open or out of spec.
- Check for short to ground or battery: measure resistance between solenoid control pin and ground/battery. Inspect for shorted circuits.
- Backprobe the TCM connector with ignition ON (engine off) and command the solenoid with a scan tool while observing voltage/duty at the control pin. Verify TCM output changes with commanded state.
- If TCM output is correct and wiring/connector check out, replace the suspect shift solenoid or valve body assembly as specified by service manual.
- If solenoid and harness are good but fault persists, inspect and test TCM power/grounds and replace or reprogram TCM per OEM procedures.
- After repairs, clear codes and road test to ensure proper shift operation and code does not return.
Likely causes
- Damaged/shorted wiring or poor connector at transmission
- Failed shift solenoid
- Faulty ground or power supply to TCM
- Intermittent connector contact due to corrosion
Fault status
Status
Transmission shift solenoid circuit malfunction detected. May cause erratic shifting or limp mode.
Repair difficulty: Medium
Diagnostic time: 1.0 - 3.0 hours
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