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 Suzuki SamuraiFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes - 1.3L TBI
- Introduction
- Self-Diagnostic System
- Trouble Code Definition
- Code Charts
- Notes
- Chart A-1 - ECM Power & Ground Circuit Check (Does Not Start)
- Chart A-2 - Check Engine Light Inoperative (Engine Starts)
- Chart A-3 - Check Engine Light Stays On - Won't Flash
- Code 13 - Oxygen Sensor Circuit
- Code 14 - ECT Sensor, Low Temperature Indicated
- Code 15 - ECT Sensor, High Temperature Indicated
- Code 21 - TPS Circuit, Signal Voltage High
- Code 22 - TPS Circuit, Signal Voltage Low
- Code 23 - IAT Sensor Circuit, Low Temperature Indicated
- Code 24 - Vehicle Speed Sensor
- Code 25 - IAT Sensor Circuit, High Temperature Indicated
- Code 31 - Map Sensor Circuit, Signal Voltage High
- Code 32 - Map Sensor Circuit, Signal Voltage Low
- Code 41 - No Ignition Signal
- Code 42 - Crank Angle Sensor
- Code 44 - Idle Switch Circuit Open Or MISADJUSTED
- Code 45 - Idle Switch Circuit Shorted Or MISADJUSTED
- Code 51 - EGR System Circuit Check - CALIF. Models Only
- Code 53 - ECM Ground Circuit Check - CALIF. Models Only
- Code 54 - 5TH Gear Switch Circuit Grounded - Federal
- Code 71 - Test Switch Circuit
- 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.