Code
P1717
SUZUKI
P — Powertrain
AT Drive Range Signal Circuit Fault
AI status
Completed
Completed
100%
Causes
- Damaged, corroded, or disconnected transmission range (shift position) switch/sensor connector or wiring
- Short to power or ground in the range-sensor circuit
- Faulty transmission range (park/neutral/drive) sensor or switch assembly
- Poor ground or reference supply from TCM/ECM
- Intermittent connector contact from vibration or corrosion
- Faulty TCM/ECM or internal driver fault
Symptoms
- Malfunction Indicator Lamp (MIL) or transmission warning lamp ON
- Incorrect or no gear position indicated on dash
- Vehicle may refuse to start in any gear other than P/N
- Transmission stuck in limp/limitation mode or abnormal shifting
- Intermittent loss of gear engagement or unexpected gear changes
What to check
- Read and record freeze-frame and stored data with a capable scan tool
- Visually inspect the range sensor connector and wiring for damage, corrosion, or pin push-out
- Check for technical service bulletins (TSBs) or wiring diagrams for the vehicle
- Verify battery voltage and good engine/ECU grounds before testing
- Confirm code returns after clearing — note if intermittent
Signal parameters
- Reference supply typically: ~5 V (verify with vehicle wiring diagram)
- Signal voltage: varies by gear (expected ~0–5 V depending on sensor type) — should change when selector moved
- Idle/park condition: expected specific voltage for P or N (see OEM data) and transitions between positions should be smooth
- Circuit resistance: continuity between sensor connector and TCM pin should be low (near 0 Ω) with ignition off
- No short to battery voltage or ground on signal wire (infinite/very high resistance to chassis or +B respectively)
Diagnostic algorithm
- Connect scan tool, confirm P1717 and any related transmission or BCM codes; record live data for range/gear position.
- Visually inspect range sensor connector, wiring harness along the route, and transmission case connector for damage or corrosion. Repair as needed.
- With ignition ON (engine off), backprobe the sensor connector and verify reference voltage, signal voltage, and ground presence per OEM specification. Move shift lever to observe signal change.
- Check continuity and resistance of the signal, reference, and ground wires between the range sensor connector and the TCM/ECM connector with ignition OFF. Repair any opens or high resistance.
- Check for shorts to battery and ground: measure resistance from signal wire to B+ and to chassis ground.
- If wiring and connector are good but signal is incorrect or noisy, substitute or bench-test the range sensor (if removable) or install a known-good sensor.
- After repairs, clear codes and road-test while monitoring live data to confirm correct range signal behavior across all selector positions and no reappearance of the code.
- If wiring, connector, and sensor check OK and code persists, test or replace the TCM/ECM or have it bench-tested/reprogrammed per dealer procedures.
Likely causes
- Loose, corroded, or damaged connector at the range sensor
- Open or short in the sensor signal wire between range sensor and TCM
- Failed transmission range sensor/switch
- Poor ground or missing reference voltage to the sensor
Fault status
Status
AT Drive Range Signal Circuit Fault — TCM detected open/short/invalid signal from transmission range (shift position) sensor circuit.
Repair difficulty: Medium
Diagnostic time: 1.0 - 2.5 hours
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