Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1994 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Trouble Code Diagnostic Hints
- Trouble Code Identification
- Trouble Code Charts
- ECM Terminal Identification
- Diagnostic Circuit Check
- ECM (+B) Circuit Check
- DTC 12, 13 - Rpm Signal
- DTC 14 - Ignition Signal
- DTC 21 - No. 1 Oxygen Sensor Signal
- DTC 22 - Engine Coolant Temperature Sensor Signal
- DTC 24 - Intake Air Temperature Sensor Signal
- DTC 25 - Lean Air/Fuel Mixture
- DTC 26 - Rich Air/Fuel Mixture
- DTC 28 - No. 2 Oxygen Sensor Signal
- DTC 31, 32 - Airflow Meter Signal Circuit
- DTC 35 - BARO Sensor
- DTC 41 - Throttle Position Sensor Signal
- DTC 42 - Vehicle Speed Sensor Signal
- DTC 43 - Starter Signal
- DTC 51 - Switch Condition Signal
- DTC 52 - No. 1 Knock Sensor Signal
- DTC 53 - Knock Control Signal
- DTC 55 - No. 2 Knock Sensor Signal
- DTC 71 - EGR System Malfunction
- DTC 81, 83, 84 & 85 - Transmission Control Module Communication
- Summary
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.