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.
1991 Suzuki Sidekick JSFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Summary
- Diagnostic Trouble Code Definitions
- Diagnostic Flow Charts
- Diagnostic Code Charts
- Code 13 - Oxygen Sensor Circuit
- Code 14 - Coolant Temperature Sensor (Cts) Indication Low
- Code 15 - Coolant Temperature Sensor (Cts) Indication High
- Code 21 - Throttle Position Sensor Circuit Indication High
- Code 22 - Throttle Position Sensor Circuit Indication Low
- Code 23 - Air Temperature Sensor (ATS) Circuit Indication Low
- Code 24 - Vehicle Speed Sensor
- Code 25 - Air Temp Sensor (ATS) Circuit Indication High
- Code 31 - Pressure Sensor (PS) Circuit Voltage High
- Code 32 - Pressure Sensor (PS) Circuit 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.)
- Code 53 - ECM Ground Circuit Check (CALIF.)
Factory Service Tools
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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.
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