Diagnostic Trouble Code (DTC) P0650
DTC Descriptor
DTC P0650 : Malfunction Indicator Lamp (MIL) Control Circuit
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
MIL Voltage Supply | P0650 | P0650 | - | - |
MIL Control | P0650/MIL ON | P0650 | P0650 | - |
Circuit/System Description
The malfunction indicator lamp (MIL) is located on the instrument panel cluster (IPC). The MIL informs the driver that an emission system fault has occurred and that the engine control system requires service. The engine control module (ECM) monitors the MIL control circuit for conditions that are incorrect for the commanded state of the MIL. For example, a failure condition exists if the ECM detects low voltage when the MIL is commanded OFF, or high voltage when the MIL is commanded ON. If the ECM detects an improper circuit condition on the MIL control circuit, this DTC sets.
Conditions for Running the DTC
- The engine speed is more than 80 RPM.
- The ignition 1 voltage is between 10-18 volts.
- The ECM has commanded the MIL ON and OFF at least once during the ignition cycle.
- DTC P0650 runs continuously once the above conditions are met.
Conditions for Setting the DTC
- The ECM detects an open, a short to ground, or a short to voltage on the circuit that controls the MIL.
- The condition exists for at least 4 seconds.
Action Taken When the DTC Sets
DTC P0650 is a Type E DTCs.
Conditions for Clearing the DTC
DTC P0650 is a Type E DTCs.
Circuit/System Verification
Turn ON the ignition, command the MIL ON and OFF with a scan tool. The MIL should turn ON and OFF as commanded.
Circuit/System Testing
- If any other IPC indicators or gages are inoperative, refer to Section 9E, Instrumentation/Driver Information.
- Ignition OFF, disconnect the ECM harness connectors. Ignition ON, the MIL should not illuminate.
- If the MIL is illuminated, test the MIL control circuit for a short to ground.
- Ignition ON, connect a 3-amp fused jumper wire between the MIL control circuit and the negative terminal of the battery. The MIL should illuminate.
- If the MIL does not illuminate, test the MIL control circuit for a short to voltage, or an open/high resistance. If the circuit test normal, replace the IPC/bulb.
- If all circuits/connections test normal, replace the ECM.
Diagnostic Trouble Code (DTC) P0685, P0686, P0687, P0689, or P0690
DTC Descriptor
DTC P0685 : Engine Controls Ignition Relay Control Circuit
DTC P0686 : Engine Controls Ignition Relay Control Circuit Low Voltage
DTC P0687 : Engine Controls Ignition Relay Control Circuit High Voltage
DTC P0689 : Engine Controls Ignition Relay Feedback Circuit Low Voltage
DTC P0690 : Engine Controls Ignition Relay Feedback Circuit High Voltage
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Important : A condition with the main relay will set multiple DTCs. The DTCs listed in the table will only set if a condition exists with the main relay.
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
B+ Supply Voltage - Coil | P0685 | P0685 | P0685 | - | - |
B+ Supply Voltage - Switch | - | P0689 | P0689 | P0690 | - |
Relay Control Circuit | P0686 | P0685 | P0685 | P0687 | P0685 |
Ignition 1 Voltage Circuit | - | P0689 | P0689 | P0690 | - |
Circuit/System Description
The engine controls (EC) ignition relay, or main relay is a normally open relay. The relay switch is held in the open position by spring tension. Battery positive voltage is supplied directly to the relay coil and the switch contact at all times. The engine control module (ECM) supplies the ground path to the relay coil control circuit via an internal integrated circuit called an output driver. When the ECM commands the main relay ON, ignition 1 voltage is supplied to the following fuses in the underhood fuse block :
- The ECM or HFV6 ECM Fuse
- The ETC Fuse
- The PRE O2/CAM Fuse
- The POST O2 Fuse
- EVEN INJ/COIL Fuse
- ODD INJ/COIL Fuse
The ignition 1 voltage that is supplied to the ECM through the ECM fuse, provides power to the internal ECM circuits associated with the throttle actuator control (TAC) operation.
Conditions for Running the DTC
DTC P0685 and DTC P0686
- The battery voltage is between 10.5-18 volts.
- The ignition is OFF.
- The main relay has been commanded OFF.
- The DTCs run continuously once the above condition is met.
DTC P0687 P0689, and P0690
- The battery voltage is between 10.5-18 volts.
- The ignition is ON.
- The main relay has been commanded ON.
- The DTCs runs continuously once the above condition is met.
Conditions for Setting the DTC
- The commanded state of the ODM and the actual state of the control circuit do not match.
OR- The ECM detects that main relay feedback voltage is not within a predicted range, when the main relay is commanded ON or OFF.
- Either condition is present for more than 2 seconds.
Action Taken When the DTC Sets
DTCs P0685, P0686, P0687, P0689, and P0690 are Type E DTCs.
Conditions for Clearing the DTC
DTCs P0685, P0686, P0687, P0689, and P0690 are Type E DTCs.
Diagnostic Aids
- This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test in Engine Electrical.
- When disconnecting electrical connectors or removing fuses and relays from a fuse block, always inspect the component electrical terminals for corrosion and the mating electrical terminals for tightness.
- Use the J 35616Connector Test Adapter Kit for any test that requires probing the underhood fuse block terminals, component wire harness terminals, or the ECM wire harness connector terminals.
Circuit/System Verification
- Ignition ON, clear the DTCs with a scan tool.
- Turn OFF the ignition for 30 seconds.
- Ignition ON, observe the DTC information with a scan tool.
- View the DTC information with a scan tool. DTCs P0685, P0686, P0687, P0689, or P0690 should not set.
Circuit/System Testing
- Ignition OFF, disconnect the EC ignition or main relay.
Important : The test lamp is used to load the circuit and may not illuminate.
- Connect a test lamp between the B+ supply circuit to the coil side of the main relay and the negative terminal of the battery.
- Ignition ON, test for less than 0.1 volts between the B+ voltage circuit of the main relay and the positive battery terminal.
- If greater than 0.1 volts, repair the B+ voltage circuit to the coil side of the main relay for a short to ground or an open/high resistance.
Important : The test lamp is used to load the circuit and may not illuminate.
- Connect a test lamp between the B+ voltage supply circuit to the switch side of the main relay and the negative terminal of the battery.
- Ignition ON, test for less than 0.1 volts between the B+ voltage circuit of the main relay and the positive battery terminal.
- If greater than 0.1 volts, repair the B+ voltage circuit to the switch side of the main relay for a short to ground or an open/high resistance.
- With the ignition OFF, connect a test lamp between the control circuit of the main relay and the B+ voltage supply circuit to the coil side of the main relay.
- Turn ON the ignition. The test lamp should turn ON when the ignition switch is cycled ON and OFF when the ignition switch is cycled OFF.
- If the test lamp remains ON all the time, test for a short to ground on the control circuit. If the circuit/connections test normal, replace the ECM.
- If the test lamp remains OFF all the time, test for a short to voltage or an open/high resistance on the control circuit. If circuit/connections test normal, replace the ECM.
Important : The ignition 1 voltage circuit is between the main relay and the ECM. The ignition 1 voltage is a feedback circuit.
- Connect a 15-amp fused jumper wire between the B+ supply voltage circuit and the ignition 1 voltage circuit of the main relay.
- Attempt to start the engine. The engine should start.
- If the engine does not start, test the ignition 1 voltage circuit between the main relay and the ECM for a short to ground or for an open/high resistance. If the circuit/connections test normal, replace the ECM.
- If all circuits/connections test normal, test or replace the main relay.
Component Testing
- Measure for 70-110 ohms of resistance between terminals 85 and 86 of the main relay.
- If the resistance is not within the specified range, replace the main relay.
- Measure for infinite resistance between the following terminals of the main relay :
- 30 and 86
- 30 and 87
- 30 and 85
- 85 and 87
- If continuity is detected, replace the main relay.
- Connect a 20 amp fused jumper wire from the positive terminal of the battery to relay terminal 85. Connect a jumper wire from the negative terminal of the battery to relay terminal 86. Measure for less than 2 ohms between terminals 30 and 87 of the relay.
- If the resistance measures more than 2 ohms, replace the main relay.
Diagnostic Trouble Code (DTC) P0688
DTC Descriptor
DTC P0688 :Engine Controls Ignition Relay FeedBack Circuit
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit/System Description
The engine control module (ECM) grounds the Engine Controls Ignition Relay FeedBack circuit through an internal solid state device called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line that is monitored by the ECM. When the ECM is commanding a component ON, the voltage potential of the control circuit should be low, near 0 volts. When the ECM is commanding the control circuit to a component OFF, the voltage potential of the circuit should be high, near battery voltage. If the ECM detects that the actual state of the control circuit does not match the expected state, a DTC will set.
Conditions for Running the DTC
- The ignition is ON.
- The system voltage is between 9-18 volts.
Conditions for Setting the DTC
- An improper voltage level has been detected on the Engine Controls Ignition Relay FeedBack circuit.
- The condition must be present for a minimum of 30 seconds.
Action Taken When the DTC Sets
DTC P0688 is a type E DTC.
Conditions for Clearing the MIL/DTC
DTC P0688 is a type E DTC.
Circuit/System Verification
Ignition ON, command the relay ON and OFF with a scan tool. Feel or listen to verify that the relay turns ON and OFF with each command.
Circuit/System Testing
- Ignition OFF, disconnect the Engine Controls Ignition Relay.
- Ignition ON, verify that a test lamp does not illuminate between the earth terminal and a known ground.
- If the test lamp illuminates, test the control circuit for a short to voltage.
- Ignition ON, Connect a test lamp between the control circuit terminal and a known ground. Command the relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If the test lamp is always ON, test the relay control circuit for a short to voltage. If the circuit tests normal replace the ECM.
- If the test lamp is always OFF, test the relay control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the ECM.
- Connect a test lamp between the Battery+ terminal and a known ground.
- If the test lamp does not activate, test the Battery+ circuit for a short to ground or an open/high resistance.
- Connect a 30A fusible link wire between the battery positive post and the Engine Controls Ignition relay voltage supply circuit terminal and verify circuit activation.
- If the circuit does not activate, test the Engine Controls Ignition relay voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the fan.
- If all circuits test normal replace the affected relay.
Diagnostic Trouble Code (DTC) P0691 or P0692
DTC Descriptor
DTC P0691 : Cooling fan Relay 1 Control low voltage
DTC P0692 : Cooling fan Relay 1 Control high voltage
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit/System Description
The engine control module (ECM) controls the low speed cooling fan operation by grounding the low speed fan relay control circuit with an internal solid state device called a driver. For high speed cooling fan operation, the ECM grounds the high speed a relay control circuit at the same time the low speed control circuit is grounded. Battery positive voltage is supplied to the low speed, high speed relay. When the ECM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. When the ECM is commanding a fan relay OFF, the voltage potential of the control circuit should be high, near battery voltage.
Conditions for Running the DTC
- The ignition is ON.
- The system voltage is between 9-18 volts.
Conditions for Setting the DTC
- An improper voltage level has been detected on the cooling fan relay control circuit.
- The condition must be present for a minimum of 30 seconds.
Action Taken When the DTC Sets
DTCs P0691 and P0692 are type E DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0691 and P0692 are type E DTCs.
Circuit/System Verification
Ignition ON, command each relay ON and OFF with a scan tool. Feel or listen to verify that each relay turns ON and OFF with each command.
Circuit/System Testing
- Ignition OFF, disconnect the appropriate fan relay.
- Ignition ON, verify that a test lamp does not illuminate between the earth terminal and a known ground.
- If the test lamp illuminates, test the earth circuit for a short to voltage.
- Ignition ON, Connect a test lamp between the control circuit terminal and a known ground. Command the relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If the test lamp is always ON, test the relay control circuit for a short to voltage. If the circuit tests normal replace the ECM.
- If the test lamp is always OFF, test the relay control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the ECM.
- Connect a test lamp between the Battery+ terminal and a known ground.
- If the test lamp does not activate, test the Battery+ for a short to ground or an open/high resistance.
- Connect a 30A fusible link wire between the battery positive post and the fan voltage supply circuit terminal and verify fan activation.
- If the fan does not activate, test the fan voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the fan.
- If all circuits test normal replace the affected relay.
Diagnostic Trouble Code (DTC) P0693 or P0694
DTC Descriptor
DTC P0693 : Cooling fan Relay 2 Control low voltage
DTC P0694 : Cooling fan Relay 2 Control high voltage
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit/System Description
The engine control module (ECM) controls the low speed cooling fan operation by grounding the low speed fan relay control circuit with an internal solid state device called a driver. For high speed cooling fan operation, the ECM grounds the high speed and S/P relay control circuit at the same time the low speed control circuit is grounded. Battery positive voltage is supplied to the low speed, high speed and S/P fan relays. When the ECM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. When the ECM is commanding a fan relay OFF, the voltage potential of the control circuit should be high, near battery voltage.
Conditions for Running the DTC
- The ignition is ON.
- The system voltage is between 9-18 volts.
Conditions for Setting the DTC
- An improper voltage level has been detected on the cooling fan relay control circuit.
- The condition must be present for a minimum of 30 seconds.
Action Taken When the DTC Sets
DTCs P0693 and P0694 are type E DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0693 and P0694 are type E DTCs.
Circuit/System Verification
Ignition ON, command each relay ON and OFF with a scan tool. Feel or listen to verify that each relay turns ON and OFF with each command.
Circuit/System Testing
- Ignition OFF, disconnect the appropriate fan relay.
- Ignition ON, verify that a test lamp does not illuminate between the earth terminal and a known ground.
- If the test lamp illuminates, test the earth circuit for a short to voltage.
- Ignition ON, Connect a test lamp between the control circuit terminal and a known ground. Command the relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If the test lamp is always ON, test the relay control circuit for a short to voltage. If the circuit tests normal replace the ECM.
- If the test lamp is always OFF, test the relay control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the ECM.
- Connect a test lamp between the Battery+ terminal and a known ground.
- If the test lamp does not activate, test the Battery+ for a short to ground or an open/high resistance.
- Connect a 30A fusible link wire between the battery positive post and the fan voltage supply circuit terminal and verify fan activation.
- If the fan does not activate, test the fan voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the fan.
- If all circuits test normal replace the affected relay.
Diagnostic Trouble Code (DTC) P0700
DTC Descriptor
DTC P0700 : Transmission Control Module (TCM) Requested MIL Illumination
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit/System Description
This diagnostic trouble code (DTC) indicates that an emission related transmission DTC set in the transmission control module (TCM). The engine control module (ECM) receives the TCM information over the serial data circuit. The ECM turns ON the malfunction indicator lamp (MIL) when the TCM sends a message over the serial data circuit requesting MIL illumination. The DTC information for the ECM will only display DTC P0700, but the freeze frame/failure records data will display the transmission DTC that set.
Conditions for Running the DTC
- The ignition is ON or the engine is operating.
- DTC P0700 runs continuously.
Conditions for Setting the DTC
The ECM receives a serial data message, from the TCM, in order to illuminate the MIL.
Action Taken When the DTC Sets
DTC P0700 is a Type A DTC.
Conditions for Clearing the DTC
DTC P0700 is a Type A DTC.
Circuit/System Verification
Important : Correct any Engine Controls DTCs before diagnosing TCM DTCs.
Diagnostic Trouble Code (DTC) P0704
DTC Descriptor
DTC P0704 :Clutch Switch Circuit
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit/System Description
The engine control module (ECM) supplies a 5 volts to the Clutch Switch Circuit. This circuit ensures the engine can only be started when the clutch pedal is fully depressed. When the pedal is full depressed the circuit is earthed through the switch circuit.
Conditions for Running the DTC
- The engine is running.
- The system voltage is between 9-18 volts.
Conditions for Setting the DTC
- The ECM detects that 15 gear changes have been performed with less than 3 clutch pedal switch inputs.
Action Taken When the DTC Sets
DTC P0704 is a type C DTC.
Conditions for Clearing the MIL/DTC
DTC P0704 is a type C DTC.
Circuit/System Verification
Ignition ON, While observing the scan tool depress and release the clutch pedal, the scan tool display display should toggle between Inactive to Active when the pedal is depressed.
Circuit/System Testing
- Ignition OFF, disconnect the Clutch pedal switch at the switch.
- Ignition ON, verify that a test lamp illuminate between the signal terminal and a known ground.
- If the test lamp does not illuminates, test the signal circuit for a short to ground or an open/high resistance. If circuit tests normal replace the ECM.
- Connect a 10A fusible link wire between the signal circuit and the earth terminal at the wiring harness connection.
- observe the scan tool active should be displayed.
- If the display still reads inactive, test the earth circuit for a short to ground or an open/high resistance.
- If all circuits test normal replace the clutch switch.
Diagnostic Trouble Code (DTC) P1011 - P1014
DTC Descriptor
DTC P1011 : Intake Camshaft Position (CMP) Actuator Park Position Bank 1
DTC P1012 : Exhaust Camshaft Position (CMP) Actuator Park Position Bank 1
DTC P1013 : Intake Camshaft Position (CMP) Actuator Park Position Bank 2
DTC P1014 : Exhaust Camshaft Position (CMP) Actuator Park Position Bank 2
Diagnostic Fault Information
Perform the Diagnostic System Check prior to using this diagnostic procedure.
Circuit/System Description
The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the camshaft timing of all 4 camshafts while the engine is operating. The CMP actuator assembly varies the camshaft position in response to directional changes in oil pressure. The CMP actuator solenoid controls the oil pressure that is applied to advance or retard a camshaft.
The CMP actuator assemblies have an outer housing that is driven by the engine timing chain. Inside the CMP assembly is a wheel with fixed vanes that is attached to the camshafts. The CMP actuator assemblies are also equipped with a locking pin. The locking pin prevents movement between the outer housing and the wheel vane assembly on engine start-ups. The CMP actuator is locked until sufficient oil pressure is available to control the CMP actuator. The locking pin is released by oil pressure before any movement in the CMP actuator assembly takes place.
Conditions for Running the DTC
- DTCs P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 are not set.
- The engine is operating for more than 1 second.
- The ECM completed the CMP actuator solenoid output driver test.
- The engine speed is more than 1,000 RPM.
- DTCs P1011, P1012, P1013, and P1014 only run on an engine start-up.
Conditions for Setting the DTC
The ECM detects that a CMP actuator is not in the parked position on an engine start-up.
Action Taken When the DTC Sets
DTCs P1011, P1012, P1013, and P1014 are type C DTCs.
Conditions for Clearing the DTC
DTCs P1011, P1012, P1013, and P1014 are type C DTCs.
Circuit/System Verification
Important : The engine oil level and the oil pressure are critical to the correct operation of the camshaft position (CMP) actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
- Start the engine. Verify there is no abnormal engine noise during start up.
- Observe the DTC information with a scan tool. DTCs P1011, P1012, P1013, and P1014 should not set.
- If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.
- Inform the customer that the following actions may cause DTCs P1011, P1012, P1013, or P1014 to set:
- Turning the engine OFF while the accelerator pedal is pressed
- Turning the engine OFF while driving
- Pressing the accelerator pedal to start the engine
Circuit/System Testing
Start the engine.
- If there is an abnormal engine noise, or DTCs P1011, P1012, P1013, or P1014 set, replace the appropriate CMP actuator.
If the customers concern is that the engine is stalling, refer to Symptoms - Engine Controls for further diagnosis.
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