P1298

Code

LAND ROVER P — Powertrain

Injector driver module failure

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 12 EN: 32 RU: 19

AI status

Completed

ready

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Page language: EN

Read stored trouble codes and freeze-frame data; record all related codes and pending codes.
Visually inspect IDM and injector connectors for corrosion, bent pins, water damage, or burn marks.
Check fuses and relays that feed the IDM and fuel/engine control circuits.
Measure battery/supply voltage at the IDM harness with ignition ON (expect ~11–14.5 V).
Verify solid ground(s) at the IDM; check continuity to chassis ground (
Back-probe injector driver outputs with engine cranking or running (use oscilloscope preferred).

Supply voltage to IDM: typically battery voltage ~11–14.5 V with ignition ON.
Ground continuity from IDM ground terminal to chassis: ideally
Injector coil resistance (varies by vehicle/injector type): commonly in low-ohm range; compare to factory spec (example ranges 2–16 Ω depending on injector design).
Driver output waveform: low-side switching pulses (0 V to near battery voltage on the injector circuit when measured across injector) — use oscilloscope to verify clean switching, expected pulse widths/duty according to engine load.
Pulse frequency/duty: depends on injector control and engine speed/load — expect pulse repetition and variable duty rather than constant DC; abnormal or missing pulses indicate driver or control fault.
Current draw on driver outputs: should match injector expected current; excessive or zero current suggests short or open.

Retrieve and record all DTCs, freeze-frame and continuous data with a capable scan tool.
Verify vehicle battery voltage and charging system are within specification.
Inspect IDM and injector connectors for corrosion, water ingress, heat damage or loose pins; repair as needed.
Check related fuses and relays; replace if blown or faulty.
With ignition ON, measure supply voltage and ground at the IDM connector; confirm proper voltage and ground continuity.
Back-probe driver output circuits while cranking/running. Use an oscilloscope to look for expected switching pulses to each injector. Note any channels with no pulses or abnormal waveforms.
Measure static resistance of each injector and compare to spec. Isolate suspect injector(s) by disconnecting and observing if fault clears or behavior changes.
Wiggle test harness/connectors while monitoring live data for intermittent changes. Repair any damaged wiring or poor connections.
If wiring and injectors check good but fault persists, bench-test or replace the IDM (if serviceable) or follow manufacturer procedure for module replacement. Ensure correct programming/coding if required.
If IDM replacement does not clear the fault, investigate ECM and communication bus (CAN/LIN) integrity and perform advanced diagnostics per factory manual.
Clear codes and road-test to verify repair. Re-scan to confirm no recurrence.

⚠️ Status

Injector driver module failure — diagnostic trouble detected in injector driver circuitry.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-4.0 hours

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P1298 — Injector driver module failure