If the warning light comes on «MIL» (malfunction signaling device)
1. Start the engine and check the condition of the indicator «MIL» A.
2. If the indicator «MIL» stays lit, connect the HDS diagnostic system to the data link connector (DLC) A, located under the control panel on the driver's side.
3. Switch on the ignition by turning the key to position «ON» (II).
4. Check for a diagnostic trouble code (DTC) and if available, write it down. Also check the captured data and/or the onboard snapshot data and download the found data. Then refer to the DTCs and start the appropriate troubleshooting procedure.
Note. Related («frozen») the information indicates the engine operating conditions at which the first malfunction, misfire or fuel injection system malfunction was registered.
The HDS system can read DTCs, fixed data, current data and other data from the engine control unit (ECM).
For special operations, see the User's Manual that came with the HDS diagnostic system.
5. If no DTCs are found, proceed to troubleshooting using the alarm «MIL».
If the alarm «MIL» did not catch fire
If the alarm «MIL» does not light up, but there is a malfunction of the vehicle, refer to troubleshooting by symptoms.
If you cannot copy the DTC
Some troubleshooting methods require you to reset the ECM memory and try to copy the DTC. If the error is temporary and you cannot copy its code, do not proceed with the troubleshooting operation. If you continue the operation, this will lead to erroneous conclusions and possibly an unnecessary replacement of the ECM.
HDS Memory Clear Command
The ECM stores various special data in its memory that allows the system to be corrected even in the absence of electrical power, for example, when the negative pole of the battery or the No. 9 IGP fuse is disconnected (15 A). When replacing parts of the memory, the fault information of the parts to be replaced must be cleared using the ''CLEAR COMMAND'' command using the HDS diagnostic system («H» ON» da Diagnostic System»).
The HDS diagnostic system has three clear memory commands to accomplish this goal. This «Clearing DTCs», «Resetting ECM data» And «Deleting the rotation reference position». The clear DTC command clears all stored DTCs, as well as latched and on-board snapshot data. This operation must be performed using the HDS diagnostic system after the DTC is reproduced during troubleshooting. Team «Resetting ECM data» clears all stored DTCs, fixed information, on-board snapshot data, and all special data necessary to correct system operation, except for the crank reference position. If the rotation position data (CKP) have been erased from the ECM computer memory, you need to perform a learning procedure on the reference rotation position (CKP). Rotation Reference Deletion Command (CKP) erases only the rotation reference position data (CKP). This command is used to eliminate the misfire or CKP sensor readings.
Scan Tool Clear Command
If typical scan tool clear commands are used, be aware that there is only one ECM/PCM clear setting that clears all commands at the same time (reference position diagnostic routine, idle diagnostic routine, fixed data, on-board function data «snapshot» and DTCs). After all commands have been cleared, the procedures must be performed in the following order: ECM Idle Diagnosis Procedure; diagnostic procedure by rotation reference position (CKP).
Clearing DTCs
1. Clearing the DTC memory using the HDS diagnostic system with the engine stopped.
2. Turn the ignition key to position «OFF».
3. Turn the ignition key to position «ON» (II) and wait approximately 30 seconds.
4. Turn the ignition key to position «OFF» and disconnect the HDS system from the data connector cable (DLC).
Resetting the ECM
1. Clearing the ECM data using the HDS diagnostic system with the engine stopped.
2. Turn the ignition key to position «OFF».
3. Turn the ignition key to position «ON» (II) and wait approximately 30 seconds.
4. Turn the ignition key to position «OFF» and disconnect the HDS system from the data connector cable (DLC).
5. Perform the ECM Idle Diagnosis procedure.
Cleaning procedure by rotation reference position (CKP) /diagnostic procedure according to the reference rotation position (CKP)
1. Connect the HDS to the data link connector DLC, located on the driver's side under the control panel.
2. Switch on the ignition by turning the key to position «ON» (II).
3. Verify that the HDS is communicating with the vehicle and the ECM. If not, troubleshoot the DLC circuit.
4. Select «CRANK PATTERN» on the menu «ADJUSTMENT MENU» with HDS.
5. Select «CRANK PATTERN LEARNING» using HDS and follow the on-screen instructions.
6. CKP reference position diagnosis procedure completed.
Diagnostic procedure (without HDS)
Start the engine. Keep the crankshaft speed of 3.000 rpm without load (in the neutral position of the manual gearbox) before turning on the radiator fan.
2. Test drive the vehicle on a level road: Slow down (at full throttle) engine operation from 2500 rpm to 1000 rpm in 1st gear.
3. Test drive the car on a level road: Slow down (at full throttle) engine operation from 5000 rpm to 3000 rpm in 1st gear.
4. Repeat steps 2 and 3 several times.
5. Turn the ignition key to position «OFF».
6. Turn the ignition key to position «ON» (II) and wait approximately 30 seconds. CKP reference position diagnostic procedure completed.
End of troubleshooting procedure (required after any troubleshooting)
1. Reset the ECM using the HDS diagnostic system.
2. Perform the ECM Idle Diagnosis procedure.
3. Turn the ignition key to position «OFF».
4. Disconnect the HDS instrument from the data connector (DLC)
Note. The ECM is part of the immobilizer system. If you replace the ECM, it will have a different immobilizer code. To be able to start the engine, you must rewrite the immobilizer code using the HDS diagnostic system.