Engine Controls - Electrical Diagnostics
- Diagnosis And Testing
- Notes
- DTC P0040: 1/1 And 2/1 O2 Sensor Harness Connectors Reversed
- DTC P0101: MAF Sensor Performance
- DTC P0102: Mass Air Flow Circuit
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. Jumper The MAF Sensor Signal And 5-Volt Supply Circuits
- 3. Checking The 5-Volt Supply
- 4. 5-Volt Supply Circuit Open
- 5. 5-Volt Supply Circuit Shorted To Ground
- 6. 5-Volt Supply Circuit Shorted To Voltage
- 7. MAF Sensor Signal Circuit Open
- 8. MAF Sensor Signal Circuit Shorted To Ground
- 9. MAF Sensor Signal Circuit Shorted To Voltage
- 10. Checking The Fused Engine Control Relay Output Circuit
- 11. Check The Sensor Ground Circuit
- 12. Sensor Ground Circuit Open
- 13. Checking For Air Restrictions Or Leaks
- 14. Intermittent Wiring And Connectors
- DTC P0103: MAF Sensor Circuit Low
- DTC P0104: MAF Sensor Throttle Angle And Speed
- DTC P0106: Map Sensor Performance
- DTC P0107: Map Sensor Circuit Low
- DTC P0108: Map Sensor Circuit High
- DTC P0112: Intake Air Temperature Sensor Circuit Low
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Pre-Diagnostic Check Out
- 2. Check For Current DTC
- 3. Jumper The IAT Sensor Signal And 5-Volt Supply Circuits
- 4. Checking The 5-Volt Supply
- 5. 5-Volt Supply Circuit Open
- 6. 5-Volt Supply Circuit Shorted To Ground
- 7. IAT Sensor Signal Circuit Open
- 8. IAT Sensor Signal Circuit Shorted To Ground
- 9. Intermittent Wiring And Connectors
- DTC P0113: Intake Air Temperature Sensor Circuit High
- DTC P0116: Engine Coolant Temperature Sensor Performance
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Pre-Diagnostic Check Out
- 2. Monitor The ECT Sensor Temperature
- 3. ECT Sensor
- 4. ECT Sensor Signal Circuit Short To Voltage
- 5. ECT Sensor
- 6. Open ECT Sensor 5-Volt Supply Circuit
- 7. Open ECT Sensor 5-Volt Supply Circuit
- 8. ECT Sensor Signal Circuit Short To Ground
- 9. Open ECT Sensor Signal Circuit
- 10. Checking The Coolant Level And Condition
- 11. ECT Sensor Range
- 12. Checking Coolant Thermostat Operation
- 13. Intermittent Wiring And Connectors
- DTC P0116: Engine Coolant Temperature Sensor Short Circuit
- DTC P0117: Engine Coolant Temperature Sensor Circuit Low
- DTC P0118: Engine Coolant Temperature Sensor Circuit High
- DTC P0120: Electronic Throttle Control Motor Performance
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. TP Sensor
- 3. TP Sensor #1 And #2 Signal Circuit Shorted To Battery Voltage
- 4. Resistance In The #1 And #2 TP Sensor Signal Circuits
- 5. Resistance Between Ground And The TP Sensor Signal Circuit
- 6. Resistance In The 5-Volt Supply Circuit
- 7. Resistance To Ground In The 5-Volt Supply Circuit
- 8. Open Sensor Ground Circuit
- 9. TP Sensor #1 Signal Circuit Shorted To TP Sensor #2 Signal Circuit
- 10. Pcm
- 11. TP Sensor Sweep
- 12. Intermittent Wiring And Connectors
- DTC P0120: Throttle Position Sensor 1/2 Correlation
- DTC P0121: Apps 5-Volt Supply Circuit
- DTC P0122: Apps Signal #1 Circuit Low
- DTC P0123: Apps Signal #1 Circuit High
- DTC P0128: Forced Limited Power Excessive High Coolant Temp
- DTC P0128: Thermostat Rationality
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. Checking The Coolant Level And Condition
- 3. Thermostat Operation
- 4. Intake Air Temp Sensor Operation
- 5. ECT Sensor Operation
- 6. Other Possible Causes
- 7. Signal Circuit Shorted To Voltage
- 8. Temperature Sensor Voltage Above 4.6 Volts
- 9. ECT Sensor Voltage Below 1.0 Volts
- 10. Signal Circuit Open
- 11. Sensor Ground Circuit Open
- 12. Signal Circuit Shorted To Ground
- 13. Signal Circuit Shorted To Sensor Ground
- 14. Intermittent Wiring And Connectors
- DTC P0131: O2 Sensor 1/1 Circuit Low
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Monitor The O2 Sensor Voltage
- 2. O2 Sensor Voltage
- 3. Disconnect The O2 Sensor
- 4. O2 Sensor Signal Circuit Shorted To Voltage
- 5. Disconnect The O2 Sensor
- 6. O2 Sensor Signal Circuit Short To Ground
- 7. O2 Sensor System Inspection
- 8. Jumper The O2 Sensor
- 9. O2 Sensor Signal Circuit Open
- 10. O2 Sensor Ground Circuit Open
- 11. Intermittent Wiring And Connectors
- DTC P0132: O2 Sensor 1/1 Circuit High
- DTC P0133: O2 Sensor 1/1 Short Delay Time
- DTC P0133: O2 Sensor 1/1 Long Performance
- DTC P0133: O2 Sensor 1/1 Long Delay Time
- DTC P0133: O2 Sensor 1/1 Short Performance
- DTC P0134: O2 Sensor 1/1 Circuit Open
- DTC P0135: O2 Sensor 1/1 Heater Circuit Low
- DTC P0135: O2 Sensor 1/1 Heater Performance
- DTC P0135: O2 Sensor 1/1 Heater Circuit High
- DTC P0135: O2 Sensor 1/1 Heater Circuit Open
- DTC P0137: O2 Sensor 1/2 Below Threshold
- DTC P0137: O2 Sensor 1/2 Above Threshold
- DTC P0137: O2 Sensor 2/2 Above Threshold
- DTC P0137: O2 Sensor 2/2 Below Threshold
- DTC P0138: O2 Sensor 1/2 Circuit High
- DTC P0138: O2 Sensor 1/2 Circuit Open
- DTC P0138: O2 Sensor 2/2 Circuit Low
- DTC P0138: O2 Sensor 2/2 Circuit Open
- DTC P0140: O2 Sensor 1/2 Circuit Low
- DTC P0140: O2 Sensor 2/2 Circuit High
- DTC P0141: O2 Sensor 1/2 Heater Circuit Low
- DTC P0141: O2 Sensor 1/2 Heater Circuit Open
- DTC P0141: O2 Sensor 1/2 Heater Circuit High
- DTC P0141: O2 Sensor 1/2 Heater Performance
- DTC P0151: O2 Sensor 2/1 Circuit Low
- DTC P0152: O2 Sensor 2/1 Circuit High
- DTC P0153: O2 Sensor 2/1 Long Performance
- DTC P0153: O2 Sensor 2/1 Long Delay Time
- DTC P0153: O2 Sensor 2/1 Short Delay Time
- DTC P0153: O2 Sensor 2/1 Short Performance
- DTC P0154: O2 Sensor 2/1 Circuit Open
- DTC P0155: O2 Sensor 2/1 Heater Circuit Low
- DTC P0155: O2 Sensor 2/1 Heater Circuit High
- DTC P0155: O2 Sensor 2/1 Heater Circuit Open
- DTC P0155: O2 Sensor 2/1 Heater Performance
- DTC P0161: O2 Sensor 2/2 Heater Performance
- DTC P0161: O2 Sensor 2/2 Heater Circuit Low
- DTC P0161: O2 Sensor 2/2 Heater Circuit Open
- DTC P0161: O2 Sensor 2/2 Heater Circuit High
- DTC P0171: Fuel System 1/1 UNDERCORRECTION Of Fuel Mixture (Off Idle)
- DTC P0171: Fuel System 1/1 Rich Control Over Limit (At Idle)
- DTC P0171: Fuel System 1/1 Rich Control Over Limit (At Load)
- DTC P0172: Fuel System 1/1 OVERCORRECTION Of Fuel Mixture (At Idle)
- DTC P0172: Fuel System 1/1 Lean Control Below Limit (At Load)
- DTC P0172: Fuel System 1/1 Lean Control Below Limit (At Idle)
- DTC P0173: Fuel System 2/1 Rich Control Over Limit (At Load)
- DTC P0174: Fuel System 2/1 Rich Control Over Limit (At Idle)
- DTC P0174: Fuel System 2/1 Rich Control Over Limit (At Load)
- DTC P0174: Fuel System 2/1 Lean Control Below Limit (At Load)
- DTC P0174: Fuel System 2/1 UNDERCORRECTION Of Fuel Mixture (Off Idle)
- DTC P0175: Fuel System 2/1 OVERCORRECTION Of Fuel Mixture (Off Idle)
- DTC P0175: Fuel System 2/1 Lean Control Bellow Limit (At Idle)
- DTC P0200: Fuel Injector Circuit
- DTC P0201: Fuel Injector #1 Circuit
- DTC P0202: Fuel Injector #2 Circuit
- DTC P0203: Fuel Injector #3 Circuit
- DTC P0204: Fuel Injector #4 Circuit
- DTC P0205: Fuel Injector #5 Circuit
- DTC P0206: Fuel Injector #6 Circuit
- DTC P0211: Throttle Actuator Stuck
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. Throttle Plate Stuck Open
- 3. TP #1 And TP #2 Both Equal 2.5 Volts
- 4. Throttle Control Motor 1 Circuit Shorted To Voltage
- 5. Throttle Control Motor 1 CKT Open
- 6. Throttle Control Motor 2 Circuit Open
- 7. Throttle Control Motor 1 Circuit Shorted To Ground
- 8. Throttle Control Motor 2 Circuit Shorted To Ground
- 9. Pcm
- 10. Intermittent Wiring And Connectors
- 3. Throttle Control Motor 2 Circuit Short To Voltage
- 4. Throttle Control Motor 1 CKT Open
- 5. Throttle Control Motor 2 Circuit Open
- 6. Throttle Control Motor 1 Circuit Shorted To Ground
- 7. Throttle Control Motor 2 Circuit Shorted To Ground
- 8. Pcm
- 9. Intermittent Wiring And Connectors
- DTC P0221: Apps Sensor #1 And #2 Voltage Correlation
- DTC P0221: Idle Speed Performance
- DTC P0221: Electronic Throttle Control Module Performance
- DTC P0221: Electronic Throttle Control Module Processor
- DTC P0222: Apps Signal #2 Circuit Low
- DTC P0223: Apps Signal #2 Circuit High
- DTC P0300: Multiple Cylinder Misfire
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. Visual And Physical Inspection
- 3. Ignition System Operation
- 4. Spark Plug
- 5. Checking Fuel Pressure
- 6. Checking Fuel Leak Down
- 7. Fuel Injector Operation
- 8. Checking For Possible Mechanical Problem
- 9. Engine Control Relay Output Circuit
- 10. Fuel Injector
- 11. Fuel Injector Control Circuit Shorted To Voltage
- 12. Fuel Injector Control Circuit Shorted To Ground
- 13. Open Fuel Injector Control Circuit
- 14. Restricted Fuel Supply Line
- 15. Fuel Strainer
- 16. Fused Ignition Switch Output Circuit
- 17. Coil On Plug
- 18. Coil On Plug Driver Circuit
- 19. Intermittent Misfire
- DTC P0301: Cylinder #1 Misfire
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Visual And Physical Inspection
- 2. Ignition System Operation
- 3. Spark Plug
- 4. Checking Fuel Pressure
- 5. Checking Fuel Leak Down
- 6. Fuel Injector Operation
- 7. Checking For Possible Mechanical Problem
- 8. Engine Control Relay Output Circuit
- 9. Fuel Injector
- 10. Injector Driver Circuit
- 11. Restricted Fuel Supply Line
- 12. Fuel Strainer
- 13. Fused Ignition Switch Output Circuit
- 14. Coil On Plug
- 15. Coil On Plug Driver Circuit
- 16. Intermittent Misfire
- DTC P0302: Cylinder #2 Misfire
- DTC P0303: Cylinder #3 Misfire
- DTC P0304: Cylinder #4 Misfire
- DTC P0305: Cylinder #5 Misfire
- DTC P0306: Cylinder #6 Misfire
- DTC P0325: Knock Sensor #1 Circuit Low
- DTC P0325: Knock Sensor #1 Circuit High
- DTC P0330: Knock Sensor #2 Circuit High
- DTC P0330: Knock Sensor #2 Circuit Low
- DTC P0335: Crankshaft Position Sensor Circuit
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. CKP Wire Harness Inspection
- 3. CKP Sensor Signal Circuit
- 4. CKP Sensor Ground Circuit
- 5. CKP Sensor Ground Circuit Shorted To Voltage
- 6. CKP Sensor Ground Circuit Shorted To Ground
- 7. Open CKP Sensor Ground Circuit
- 8. CKP Sensor Signal Circuit Shorted To Voltage
- 9. CKP Sensor Signal Circuit Shorted To Ground
- 10. Open CKP Sensor Signal Circuit
- 11. Tone Wheel/Pulse Ring Inspection
- 12. Intermittent Wiring And Connectors
- DTC P0341: Camshaft Position Timing Over-Retarded
- DTC P0341: Camshaft Position Timing Over-Advanced
- DTC P0341: Camshaft Position Sensor Performance
- DTC P0400: EGR System Performance
- DTC P0403: EGR Control Circuit
- DTC P0410: Secondary Air Injection System
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. Inspect The Secondary Air Injection System
- 3. Operate The Air Pump
- 4. Air Pump Switchover Valve Vacuum Check
- 5. Monitor The O2 Sensors
- 6. Air Pump Solenoid Vacuum Check
- 7. Disconnect The Air Pump
- 8. Air Pump Ground Circuit Open
- 9. Inspect The Air Pump Fuse
- 10. Air Pump Fuse Open
- 11. Jumper The Air Pump Relay
- 12. Intermittent Wiring And Connectors
- DTC P0410: Secondary Air Injection Relay Circuit
- DTC P0412: Secondary Air Injection Switchover Solenoid Circuit
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Actuate The Secondary Air Pump Switchover Solenoid
- 2. Testing The Fused Engine Control Relay Output And Ground Circuit Of The Secondary Air Pump Switchover Solenoid.
- 3. Checking The Fused Engine Control Relay Output Circuit At The Air Pump Switchover Solenoid
- 4. Checking The Air Pump Switchover Solenoid Control Circuit
- 5. Intermittent Wiring And Connectors
- DTC P0422: Catalytic 1/1 Efficiency
- DTC P0432: Catalytic 2/1 Efficiency
- DTC P0440: General EVAP System Failure
- DTC P0441: EVAP Purge Valve
- DTC P0442: EVAP System Small Leak
- DTC P0445: EVAP Purge Solenoid Circuit
- DTC P0446: Charcoal Canister Shutoff Valve
- DTC P0446: EVAP Purge Solenoid Stuck Open
- DTC P0451: Fuel Tank Pressure Sensor Performance
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Reading Fuel Tank Pressure
- 2. Fuel Tank Pressure Sensor Signal Shorted To Voltage
- 3. Open Fuel Tank Pressure Sensor Ground Circuit
- 4. Fuel Tank Pressure Sensor
- 5. Fuel Tank Pressure Sensor 5-Volt Supply
- 6. Fuel Tank Pressure Sensor 5-Volt Supply Shorted To Ground
- 7. Open Fuel Tank Pressure Sensor 5-Volts Supply Circuit
- 8. Open Fuel Tank Pressure Sensor Signal
- 9. Fuel Tank Pressure Sensor Signal Shorted To Ground
- DTC P0452: Fuel Tank Pressure Sensor Circuit Low
- DTC P0453: Fuel Tank Pressure Sensor Circuit High
- DTC P0455: EVAP System Large Leak
- DTC P0457: EVAP Purge Valve Leaking
- DTC P0460: Fuel Level Sensor Circuit
- DTC P0500: No Vehicle Speed Signal (Cab Can Message)
- DTC P0500: Vehicle Speed Performance Esp Mil Request
- DTC P0561: Battery System Voltage
- DTC P0562: Battery System Low
- DTC P0563: Battery System High
- DTC P0571: Stop Lamp Switch Can Signal Lost To Trans Performance
- DTC P0571: Stop Lamp Switch Signal Performance
- DTC P0600: Incorrect Can Message From EIS Control Module
- DTC P0600: No Can Message From Cab Module
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If Cab DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can C Bus Termination
- 4. Pcm Can C Bus Termination
- 5. SKREEM Termination
- 6. Can C Bus (-) Circuit Open
- 7. Can C Bus (+) Circuit Open
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From Cab To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P0600: No Transmission Bus Message
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If TCM DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can C Bus Termination
- 4. Pcm Can C Bus Termination
- 5. SKREEM Termination
- 6. Can C Bus (-) Circuit Open
- 7. Can C Bus (+) Circuit Open
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From TCM To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P0600: Lost Comm With Electric Gear Shift Module (SLA)
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If SLA DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can C Bus Termination
- 4. Pcm Can C Bus Termination
- 5. SKREEM Termination
- 6. Can C Bus (-) Circuit Open
- 7. CAN C Bus (+) CIRCUIT OPEN
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From SLA To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P0600: No Cluster Bus Message
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If Instrument Cluster DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can C Bus Termination
- 4. Pcm Can C Bus Termination
- 5. SKREEM Termination
- 6. Can C Bus (-) Circuit Open
- 7. Can C Bus (+) Circuit Open
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From Instrument Cluster To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P0602: Pcm Programmed Incorrect Trans/No Comm From TCM
- DTC P0700: Transmission Control System (Mil Request)
- DTC P0702: Transmission Control Module Low Voltage
- DTC P0702: Transmission Control System (Mil Request)
- DTC P0702: Loss Of Torque Management Signal
- DTC P0702: TCM Torque Management Request Performance
- DTC P0705: SLA Control System (Mil Request)
- DTC P0705: Transmission Control System (Mil Request)
- DTC P0715: Transmission Control System (Mil Request)
- DTC P0720: Transmission Incorrect Torque Request From Esp
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If TCM DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can C Bus Termination
- 4. Pcm Can C Bus Termination
- 5. SKREEM Termination
- 6. Can C Bus (-) Circuit Open
- 7. Can C Bus (+) Circuit Open
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From TCM To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P0720: Transmission Control System (Mil Request)
- DTC P0730: Transmission Control System (Mil Request)
- DTC P0740: Transmission Control System (Mil Request)
- DTC P0743: Transmission Control System (Mil Request)
- DTC P0748: Transmission Control System (Mil Request)
- DTC P0753: Transmission Control System (Mil Request)
- DTC P0758: Transmission Control System (Mil Request)
- DTC P0763: Transmission Control System (Mil Request)
- DTC P1386: Knock Sensor System Failure
- DTC P1600: Rough Road Detected
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If Cab DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can Bus Termination
- 4. Pcm Can Bus Termination
- 5. SKREEM Termination
- 6. Can Bus (-) Circuit Open
- 7. Can C Bus (+) Circuit Open
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From Cab To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P2513: Enhanced Accident Report Driver Circuit High
- DTC P2513: Enhanced Accident Report Driver Circuit Low
- DTC P2545: Esp Torque Management Request Performance
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check To See If Cab DTCS Are Present
- 2. Verify DTCS
- 3. Pcm And SKREEM Can C Bus Termination
- 4. Pcm Can C Bus Termination
- 5. SKREEM Termination
- 6. Can C Bus (-) Circuit Open
- 7. Can C Bus (+) Circuit Open
- 8. Can C Bus (+) Circuit Shorted To Voltage
- 9. Can C Bus (-) Circuit Shorted To Voltage
- 10. Can C Bus (-) Circuit Short To Ground
- 11. Can C Bus (-) Circuit Open From Cab To Pcm
- 12. Intermittent Wiring And Connectors
- DTC P2561: HVAC Control Module Requested Mil Illumination
- Circuit Tests
- Cooling Fan Control Circuit Open
- Cooling Fan Control Circuit High
- Cooling Fan Control Circuit Low
- Engine Oil Sensor Level Performance
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Checking For Oil Sensor DTCS
- 2. Checking For Oil Sensor Level DTC
- 3. 5-Volt Supply Circuit
- 4. 5-Volt Supply Circuit Shorted To Voltage
- 5. 5-Volt Supply Circuit Shorted To Ground
- 6. 5-Volt Supply Circuit Open
- 7. Open Oil Sensor Ground Circuit
- 8. Oil Sensor Signal Circuit Open
- 9. Oil Sensor Signal Circuit Shorted To Ground.
- 10. Intermittent Wiring And Connectors
- Engine Oil Sensor Over Temperature
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Checking For Oil Sensor DTCS
- 2. Checking For Oil Sensor Level DTC
- 3. 5-Volt Supply Circuit
- 4. 5-Volt Supply Circuit Shorted To Voltage
- 5. 5-Volt Supply Circuit Shorted To Ground
- 6. 5-Volt Supply Circuit Open
- 7. Open Oil Sensor Ground Circuit
- 8. Open Oil Sensor Signal Circuit
- 9. Oil Sensor Signal Circuit Shorted To Ground.
- 10. Intermittent Wiring And Connectors
- Engine Oil Sensor Performance
- Engine Oil Sensor Quality Performance
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Checking For Oil Sensor DTCS
- 2. Checking For Oil Sensor Quality DTCS
- 3. 5-Volt Supply Circuit
- 4. 5-Volt Supply Circuit Shorted To Voltage
- 5. 5-Volt Supply Circuit Shorted To Ground
- 6. 5-Volt Supply Circuit Open
- 7. Open Oil Sensor Ground Circuit
- 8. Oil Sensor Signal Circuit Open
- 9. Oil Sensor Signal Circuit Shorted To Ground.
- 10. Intermittent Wiring And Connectors
- Engine Oil Sensor Water Contamination
- Safety Fuel Shut Off Detected
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Check For Current DTC
- 2. Throttle Plate Stuck Open
- 3. Throttle Control Motor 2 Circuit Short To Voltage
- 4. Throttle Control Motor 1 Circuit Open
- 5. Throttle Control Motor 2 Circuit Open
- 6. Throttle Control Motor 1 Circuit Shorted To Ground
- 7. Throttle Control Motor 2 Circuit Shorted To Ground
- 8. Pcm
- 9. Intermittent Wiring And Connectors
- Short Runner Solenoid Circuit High
- Circuit Diagram & Connector Identification
- When Monitored and Set Condition
- Possible Causes
- Diagnostic Test
- 1. Checking Short Runner Valve Solenoid Operation With The DRB III(R)
- 2. Fused Engine Control Relay Output Circuit
- 3. Checking The Short Runner Value Solenoid
- 4. Checking The Short Runner Value Solenoid Control Circuit For A Short To Voltage
- 5. Checking The Short Runner Value Solenoid Control Circuit For A Short To Ground
- 6. Checking Short Runner Value Solenoid Control Circuit For An Open
- 7. Intermittent Wiring And Connectors
- Short Runner Solenoid Circuit Low
- Short Runner Solenoid Circuit
- Speed Control Switch Input Circuit
- *Checking Fuel Delivery
- *Checking Hard Start (Fuel System)
- *Engine Cranks But Does Not Start
- *Intermittent No Crank
- Verification Tests
- Schematics And Diagrams