C1947

Code

LAND ROVER C — Chassis

Track position switch circuit seat - short to ground

Brand: LAND ROVER

Type: C — Chassis

Views: UK: 13 EN: 17 RU: 21

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Page language: EN

Causes

Damaged or chafed wiring harness under the seat contacting chassis ground
Corroded or loose connector pins at the seat switch or control module
Faulty/shorted track position switch or seat position sensor
Water ingress or contamination in connector or switch
Faulty seat control module or internal short
Improper previous repair (pinched wires, incorrect routing)

Symptoms

Seat fore/aft position sensor fault stored (C1947)
Seat adjustment (track) may be inoperative or behave intermittently
Seat memory functions may not work
Malfunction indicator or warning recorded in vehicle scan tool
Possible failure to store/recall seat positions

What to check

Read and record freeze-frame and live data with a capable scan tool; confirm C1947 is active and note any related codes
Visually inspect wiring, loom, and connectors under the seat for pinching, chafing, corrosion or water damage
Check that seat connectors are fully seated and locking tabs intact
Backprobe the track position switch connector with ignition ON and operate seat while watching live data
Measure continuity between the signal wire and chassis ground with ignition off — low resistance indicates a short
Inspect and test ground connections for tightness and corrosion

Signal parameters

Reference/supply voltage to seat switch: typically ~5 V (±5%) or vehicle battery where applicable; verify with OEM data
Expected seat track switch signal: variable between ~0.5–4.5 V depending on position (or specified discrete logic levels) — not 0 V
Short to ground condition: signal reading ~0 V or continuity to chassis ground
Open circuit/normal: high resistance between signal and ground (typically >10 kΩ)
Connector pin voltages: 12 V supply and ground continuity should be present per wiring diagram

Diagnostic algorithm

Connect a diagnostic scanner and confirm C1947 is current; record related codes and live data. Clear the code, then attempt to recreate to verify persistence.
Safety first: if seat removal or airbag/pretensioner work is required, disconnect the vehicle battery and follow manufacturer waiting time for supplemental restraint system capacitors to discharge.
Visually inspect the entire length of the seat harness (under seat, under trim channels, through seat frame) for damage, abrasion, or water ingress. Repair any obvious damage.
With ignition ON and scanner monitoring the track position PID, backprobe the switch connector. Operate the seat track while observing the signal. A reading near 0 V indicates the short to ground. Wiggle the harness/connector to see if the fault is intermittent.
With ignition OFF, check continuity between the signal wire and chassis ground.
Disconnect the track position switch connector. If the code clears and the short disappears, the fault is likely in the switch or harness ahead of the connector. If the short remains with switch disconnected, suspect wiring or module side short.
Inspect and repair connectors (clean corrosion, straighten pins, replace damaged terminals). Repair wiring with correct gauge wire and protect with conduit/loom; avoid high-resistance splices.
If wiring and connector repairs do not clear the issue, test/replace the track position switch. If replacement doesn’t cure the fault, consider replacing or bench-testing the seat control module per OEM procedures.
After repair, reconnect battery (if removed), clear codes, verify normal operation of seat track positions and that C1947 does not return. Road-test or exercise seat functions multiple times to confirm durability of repair.

Likely causes

Wire insulation abrasion under seat causing short to body
Corroded/loose connector at switch or module
Failed track position switch/sensor
Short inside seat control module

Fault status

⚠️ Status

Track position switch circuit (seat) - short to ground detected (C1947).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours

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