Caterpillar 3406B/3406C PEEC (Programmable Electronic Engine Control) Troubleshooting Field Guide

When something is wrong, a structured troubleshooting guide saves hours. This manual for the Caterpillar 3406B/3406C PEEC (Programmable Electronic Engine Control) Troubleshooting Field helps you work from symptom or fault code towards the repair.

The document is 85 pages long and is referenced as Compiled troubleshooting field guide (not a standalone Cat publication number).

What's inside

• PEEC system overview (PEEC I, PEEC II, PEEC II.V generations)
• Common problems - timing advance failures, speed burps/engine surge, intermittent engine shutdowns, low power/restricted RPM
• PEEC electronic component failure diagnosis - BTM, rack/timing sensors, shutoff solenoid, transducer module, engine speed sensor, ECM/personality module
• Other problems - cold mode (8TC), cold start problems, parameter programming/boost sensor calibration/fault code 48, repeat shutoff solenoid failures
• Current parts cross-reference lists by PEEC generation and engine prefix (ECM, transducer module, speed sensor, rack sensor, timing sensor, BTM, throttle position sensor, oil pressure sensor kit)

Models covered

• 3406B (8TC
• 5YG
• 2EK)
• 3406C (4CK)

User help

1. Check the fit first. Compare your model and serial number with the coverage shown above. If you are unsure, message us with those details before ordering and we will help you confirm.
2. Get the file. This is a digital PDF download. Nothing is shipped, so you can start using it as soon as you have the file.
3. Read it on any device. The file opens in standard PDF readers on Windows, Mac, Android and iOS. Keep a backup copy so you always have it.
4. Find things quickly. Use the contents pages and your reader's search (Ctrl+F or Cmd+F) to jump to a component, fault code or specification. Print only the pages you need for the workshop.
5. Start from the symptom or fault code. Work through the listed checks in order and confirm the fix by re-testing before returning the machine to work.
6. Safety first. Work on machinery, fuel and electrical systems carries real risk. Follow the document's safety notes, use suitable tools and supports, and comply with local rules. If a job is beyond your experience, use a qualified technician.

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