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.
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HOMESERVICE MANUALSJEEP1994CHEROKEE COUNTRY, 4D UTILITY, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 2.5L & 4.0L
1994 Jeep Cherokee Country, 4D Utility, RWD
Engine Controls - Tests W/Codes - 2.5L & 4.0L
1994 Jeep Cherokee Country, 4D Utility, RWDSECTION Engine Controls - Tests W/Codes - 2.5L & 4.0L
- Introduction
- Model Identification
- Self-Diagnostic System
- Inactive DTC Condition
- Using DRB
- Theft Alarm System
- Diagnostic Trouble Codes/Messages
- CODES/MESSAGES (Note: For DTC table, see TEST TC-1A under "Self-Diagnostic Tests.")
- Code 11 - NO CRANK REFERENCE SIGNAL AT PCM
- Code 12 - BATTERY DISCONNECT
- Code 13 - NO CHANGE IN MAP FROM START TO RUN
- Code 14 - MAP VOLTAGE TOO LOW
- Code 14 - MAP VOLTAGE TOO HIGH
- Code 15 - NO VEHICLE SPEED SENSOR SIGNAL
- Code 17 - ENGINE IS COLD TOO LONG
- Code 20 - O2S STAYS AT CENTER
- Code 21 - O2S SHORTED TO VOLTAGE
- Code 22 - ECT SENSOR VOLTAGE TOO LOW
- Code 22 - ECT SENSOR VOLTAGE TOO HIGH
- Code 23 - INTAKE AIR TEMPERATURE SENSOR VOLTAGE LOW
- Code 23 - INTAKE AIR TEMPERATURE SENSOR VOLTAGE HIGH
- Code 24 - THROTTLE POSITION SENSOR VOLTAGE LOW
- Code 24 - THROTTLE POSITION SENSOR VOLTAGE HIGH
- Code 25 - IDLE AIR CONTROL MOTOR CIRCUITS
- Code 27 - INJECTOR #1-6 CONTROL CIRCUIT
- Code 33 - A/C CLUTCH RELAY CIRCUIT
- Code 34 - SPEED CONTROL SOLENOID CIRCUITS
- Code 35 - RADIATOR FAN RELAY CIRCUIT
- Code 41 - GENERATOR FIELD NOT SWITCHING PROPERLY
- Code 42 - AUTO SHUTDOWN RELAY CONTROL CIRCUIT
- Code 44 - BATTERY TEMP SENSOR VOLTS OUT OF LIMIT
- Code 46 - CHARGING SYSTEM VOLTAGE TOO HIGH
- Code 47 - CHARGING SYSTEM VOLTAGE TOO LOW
- Code 51 - O2S STAYS BELOW CENTER (LEAN)
- Code 52 - O2S STAYS ABOVE CENTER (RICH)
- Code 53 - INTERNAL PCM FAILURE
- Code 53 - PCM FAILURE SPI COMMUNICATION
- Code 54 - NO CAM SYNC SIGNAL AT PCM
- Code 55 - BLANK DISPLAY
- Code 62 - PCM FAILURE SRI MILE NOT STORED
- Code 63 - PCM FAILURE EEPROM WRITE DENIED
- Connector Identification
- Self-Diagnostic Tests
- Test TC-1A - Checking For DTCS
- Test TC-2A - No Crank Reference Signal At Pcm (DTC 11)
- Test TC-2B - No Crank Reference Signal At Pcm
- Test TC-3A - No Cam Sync Signal At Pcm (DTC 54)
- Test TC-4A - No Change In Map From Start To Run (DTC 13)
- Test TC-5A - Map Sensor Voltage Too Low (DTC 14)
- Test TC-6A - Map Sensor Voltage Too High (DTC 14)
- Test TC-7A - No Vehicle Speed Sensor Signal (DTC 15)
- Test TC-7B - No Vehicle Speed Sensor Signal
- Test TC-8A - Oxygen (O2) Sensor Stays At Center (DTC 21)
- Test TC-9A - Oxygen (O2) Sensor Shorted To Voltage (DTC 21)
- Test TC-10A - Oxygen (O2) Sensor Stays Above Center (Rich) (DTC 52)
- Test TC-11A - Oxygen (O2) Sensor Stays Below Center (Lean) (DTC 51)
- Test TC-12A - ECT Sensor Voltage Too High (DTC 22)
- Test TC-13A - ECT Sensor Voltage Too Low (DTC 22)
- Test TC-14A - Intake Air Temp Sensor Voltage Low (DTC 23)
- Test TC-15A - Intake Air Temp Sensor Voltage High (DTC 23)
- Test TC-16A - Throttle Position Sensor Voltage High (DTC 24)
- Test TC-17A - Throttle Position Sensor Voltage Low (DTC 24)
- Test TC-18A - Idle Air Control Motor Circuits (DTC 25)
- Test TC-18B - Idle Air Control Motor Circuits
- Test TC-18C - Idle Air Control Motor Circuits
- Test TC-18D - Idle Air Control Motor Circuits
- Test TC-18E - Idle Air Control Motor Circuits
- Test TC-19A - Injector Control Circuit (DTC 27)
- Test TC-19B - Injector #1 Control Circuit
- Test TC-20A - Injector #2 Control Circuit (DTC 27)
- Test TC-21A - Injector #3 Control Circuit (DTC 27)
- Test TC-22A - Injector #4 Control Circuit (DTC 27)
- Test TC-23A - Injector #5 Control Circuit (DTC 27)
- Test TC-24A - Injector #6 Control Circuit (DTC 27)
- Test TC-25A - A/C Clutch Relay Circuit (DTC 33)
- Test TC-26A - Rad Fan Control Relay Circuit (DTC 35)
- Test TC-27A - Auto Shutdown Relay Control Circuit (DTC 42)
- Test TC-28A - No ASD Relay Volt Sense At Pcm (DTC 42)
- TEST TC-29A OR TC-30A - PCM FAILURE SRI MILE NOT STORED OR PCM FAILURE EEPROM WRITE DENIED (DTC 62 or 63)
- Test TC-31A - Fuel Pump Resistor By-Pass Relay Circuit
- Test NTC-1A - No DTC Test Menu
- Test NTC-2A - Checking Secondary Ignition & Timing
- Test NTC-3A - Checking Fuel Pressure
- Test NTC-3B - Checking Fuel Pressure
- Test NTC-4A - Checking Coolant Sensor Calibration
- Test NTC-5A - Checking TPS Calibration
- Test NTC-6A - Checking Map Sensor Calibration
- Test NTC-7A - Checking Oxygen (O2) Sensor Switching
- Test NTC-7B - Checking Oxygen (O2) Sensor Switching
- Test NTC-8A - Checking Idle Air Control Motor
- Test NTC-8B - Checking Idle Air Control Motor
- Test NTC-9A - Checking Park/Neutral Switch
- Test NTC-10A - Checking Pcm Ground & Power Circuits
- Test NTC-11A - Checking Engine Vacuum
- Test NTC-12A - No DTC Mechanical Test
- No-Start Tests
- Test NS-1A - Qualifying No-Start Condition
- Test NS-2A - Inspecting Fuel System
- Test NS-3A - Inspecting Mechanical System
- Test NS-4A - Correcting Fuel Delivery
- Test NS-4B - Correcting Fuel Delivery
- Test NS-5A - Inspecting Fuel Pump
- Test NS-5B - Inspecting Fuel Pump
- Test NS-6A - Correcting No Response Condition
- Test NS-6B - Correcting No Response Condition
- Test NS-6C - Correcting No Response Condition
- Test NS-7A - Inspecting Idle Air Control Motor Operation
- Test NS-7B - Inspecting Idle Air Control Motor Operation
- Test NS-7C - Inspecting Idle Air Control Motor Operation
- Test NS-7D - Inspecting Idle Air Control Motor Operation
- Test NS-7E - Inspecting Idle Air Control Motor Operation
- Test NS-8A - Correcting Start & Stall Condition
- Verification Tests
- Wiring Diagrams
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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.