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Engine Stalls




Engine

Fuel and Emissions Systems Symptom Troubleshooting - Engine stalls

Engine stalls

Before beginning this troubleshooting, do a diagnostic interview.
* When the symptom cannot be duplicated, you can perform the troubleshooting using the on-board snapshot information in this procedure. As refer to the result of the diagnostic interview (date, place) and the present total mileage, compare the total mileage which is estimated from the interview when a failure occurred and the parameter (total mileage) in the on-board snapshot information. Make sure the date when the failure occurred corresponds with the date on which the on-board snapshot information is recorded. If it doesn't, on-board snapshot information cannot be used in this troubleshooting.

NOTE: Before beginning this troubleshooting:
* Make sure the battery is fully charged.
* Make sure the fuel tank is at least 1/4 full.
* Make sure the engine oil level is correct.

After the troubleshooting, reset the PCM with the HDS to certainly erase the on-board snapshot information recorded on the PCM.

1. DTC check:

DTC check
-1. Turn the ignition switch to ON (II).

-2. Check for Pending or Confirmed DTCs with the HDS.

Are any Pending or Confirmed DTCs indicated?
-YES- Go to the indicated DTC's troubleshooting.
-NO- Go to step 2.
NOTE: If the HDS does not communicate with the vehicle, go to the PCM power and ground troubleshooting PCM Power And Ground Circuit Troubleshooting.

2. Problem verification:

Problem verification
-1. Set the HDS to record a snapshot for 30 seconds.

-2. Start the engine and let it idle without load (in P or N).

-3. Use the HDS to take a snapshot if the engine stalled.

Did the engine stall?
-YES- Go to step 4 (diagnosis by parameter (MAF SENSOR)).
-NO- Go to step 3.

3. On-board snapshot check:

On-board snapshot check
-1. Check for a record of engine stall 2 in the on-board snapshot with the HDS

Is there a Engine Stall 2 record in the on-board snapshot?
-YES- Go to step 4 (diagnosis by parameter (MAF SENSOR)).
-NO- Go to step 14 (fuel system troubleshooting).
NOTE: If an engine stall 2 on-board snapshot was not found, the snapshot may have been lost due to low battery voltage or because of battery disconnection or replacement.

4. On-board snapshot check (MAF SENSOR):

On-board snapshot check (MAF SENSOR)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the MAF sensor and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the MAF sensor pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Check the MAF sensor for loose terminals or poor connections. If the terminals and connections are OK, substitute a known-good MAF sensor Service and Repair.
-Pattern 2- The MAF sensor is OK. Go to step 5 (diagnosis by parameter (ECT SENSOR 1)).

5. On-board snapshot check (ECT SENSOR 1):

On-board snapshot check (ECT SENSOR 1)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the ECT sensor 1 and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the ECT sensor 1 pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Check for a faulty ECT sensor 1.
-Pattern 2- ECT sensor 1 is OK. Go to step 6 (diagnosis by parameter (BATTERY)).

6. On-board snapshot check (BATTERY):

On-board snapshot check (BATTERY)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the BATTERY and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the BATTERY pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Test the battery Battery Test, and check the battery cables and terminal connections
-Pattern 2- The battery is OK. Go to step 7 (diagnosis by parameter (CKP NO PULSE)).

7. On-board snapshot check (CKP NO PULSE):

On-board snapshot check (CKP NO PULSE)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the CKP NO PULSE and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the CKP NO PULSE pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Do the troubleshooting procedure for DTC P0335 DTC Troubleshooting. Check for after market accessories.
-Pattern 2- Go to step 8 (diagnosis by parameter (CKP NOISE)).

8. On-board snapshot check (CKP NOISE):

On-board snapshot check (CKP NOISE)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the CKP NOISE and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the CKP NOISE pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Go to the troubleshooting procedure for DTC P0339 DTC Troubleshooting. Check for after market accessories.
-Pattern 2- The CKP sensor is OK. Go to step 9 (diagnosis by parameter (ST FUEL TRIM)).

9. On-board snapshot check (AF FB (ST FUEL TRIM)):

On-board snapshot check (AF FB (ST FUEL TRIM))
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the AF FB (ST FUEL TRIM) and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the AF FB (ST FUEL TRIM) pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Diagnostic procedure:
1. Check fuel shut-off solenoid valve 1/fuel shut-off solenoid valve 2 operation sound.

NOTE: If you hard to hear the operation sound, check the sound with touching the solenoid when Turning the ignition switch ON (II)
2. Go to the fuel shut-off solenoid valve 1/fuel shut-off solenoid valve 2 circuit troubleshooting. Testing and Inspection
3. Test the fuel shut-off solenoid valve relay. Testing and Inspection
4. Go to the injector control module circuit troubleshooting. Injector Control Module Circuit Troubleshooting
5. Go to the injector control module relay circuit troubleshooting Injector Control Module Relay Circuit Troubleshooting.
6. Test the injector control module relay. Testing and Inspection
7. Test PGM-FI main relay 1. Testing and Inspection
8. Check the fuel filter A and fuel filter B element.
9. Check for the following fuses:
*No. A20 (15 A) fuse (in the under-hood fuse/relay box)
*No. B4 (15 A) fuse (in the under-dash fuse/relay box)
-Pattern 2- Go to step 10 (diagnosis by parameter (MISFIRE)).

10. On-board snapshot check (MISFIRE):

On-board snapshot check (MISFIRE)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the MISFIRE and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the MISFIRE pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Diagnostic procedure:
1. If misfire counts up without storing misfire DTC P0300-P0304, go to DTC P0300-P0304 troubleshooting DTC Troubleshooting.
2. If the misfire count reaches prescribed value, DTC P0300-P0304 is stored. Go to the DTC P0300-P0304 troubleshooting DTC Troubleshooting.
-Pattern 2- Go to step 11 (diagnosis by parameter (A/C CLUTCH)).

11. On-board snapshot check (A/C CLUTCH):

On-board snapshot check (A/C CLUTCH)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the A/C CLUTCH and engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the A/C CLUTCH pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Diagnostic procedure:
1. Check for excessive charging of A/C refrigerant.
2. Check for charging of other gas.
-Pattern 2- Go to step 12 (diagnosis by parameter (PNP SWITCH)).

12. On-board snapshot check (PNP SWITCH):

On-board snapshot check (PNP SWITCH)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the PNP SWITCH and the engine speed in the configuration list.
Check the recorded snapshot parameters of the engine stall 2, then compare the PNP SWITCH pattern from the charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Go to step 13 (diagnosis by parameter (SLIP RATIO OF TORQ OR STARTCLUTCH)).
-Pattern 2- Go to step 19 (fuse and relay check).

13. On-board snapshot check (SLIP RATIO OF TORQ OR STARTCLUTCH):

On-board snapshot check (SLIP RATIO OF TORQ OR STARTCLUTCH)
-1. Select HDS Engine Stall 2 in the on-board snapshot.

-2. Select the SLIP RATIO OF TORQ OR STARTCLUTCH, engine speed, vehicle speed in the configuration list.
Check the recorded on-board snapshot parameters while the engine stall, then chose the SLIP RATIO OF TORQ OR STARTCLUTCH pattern from these charts, and determine the problem.





Which pattern is indicated?
-Pattern 1- Go to the automatic transmission systems symptom troubleshooting index for torque converter clutch does not disengage Testing and Inspection.
-Pattern 2- Go to step 14 (fuel system troubleshooting).

14. Fuel pressure check:

Fuel pressure check
-1. Turn the ignition switch ON (II) and wait 2 seconds or more, then turn the ignition switch to LOCK (0). Repeat this step several times.
NOTE: When turn the ignition switch ON (II), fuel shut-off solenoid valve 1 and 2 operate 2 seconds.

-2. Turn the ignition switch to ON (II), and check the FUEL PRES. in the DATA LIST with the HDS.

Is any pressure indicated ?
-YES- Go to step 15 (ignition system troubleshooting).
-NO- Diagnostic procedure:
1. Check for a fuel leakage. Testing and Inspection
2. Check the fuel line. Testing and Inspection
3. Check fuel shut-off solenoid valve 1/fuel shut-off solenoid valve 2 operation sound.

NOTE: If you hard to hear the operation sound, check the sound with touching the solenoid when Turning the ignition switch ON (II)
4. Go to the fuel shut-off solenoid valve 1/fuel shut-off solenoid valve 2 circuit troubleshooting. Testing and Inspection
5. Test the fuel shut-off solenoid valve relay. Testing and Inspection
6. Test the injector control module relay. Testing and Inspection
7. Go to the injector control module circuit troubleshooting. Injector Control Module Circuit Troubleshooting
8. Go to the injector control module relay circuit troubleshooting Injector Control Module Relay Circuit Troubleshooting.
9. Test PGM-FI main relay 1. Testing and Inspection
10. Check the fuel filter A/fuel filter B element.
11. Check for the following fuses:
*No. A20 (15 A) fuse (in the under-hood fuse/relay box)
*No. B4 (15 A) fuse (in the under-dash fuse/relay box)

15. Spark plug visual check:

Spark plug visual check
-1. Turn the ignition switch to LOCK (0).

-2. Remove the spark plugs. Service and Repair

-3. Check conditions of spark plug electrode.
NOTE: Make sure the spark plugs are the correct part number for the vehicle. If the plugs are aftermarket or they are not the correct part number, replace all of the plugs and retest.

Is the electrode damage or worn?
-YES (worn)- Replace the spark plugs.
-YES (damaged)- Replace the damaged spark plugs Service and Repair, determine the cause of the spark plug damage.
-NO- Go to step 16.

16. Determine possible failure area (Ignition system, Others):

Determine possible failure area (Ignition system, Others)
-1. Do the ALL INJECTOR FUNCTION TEST in the INSPECTION MENU with the HDS, stop fuel injection.

-2. Turn the ignition switch to LOCK (0).

-3. Insert the spark plug into the ignition coil and ground it to the engine.

-4. Crank the engine and watch for spark at the spark plugs.

Is there spark?
-YES- The ignition system is OK. Select PCM reset in the PGM-FI INSPECTION MENU to cancel ALL INJECTORS STOP with the HDS, then go to step 18 (engine compression troubleshooting).
-NO- Go to step 17.

17. Ignition coil power circuit check:

Ignition coil power circuit check
-1. Disconnect the following connector(s).





-2. Remove the PGM-FI subrelay (A) from the under-hood fuse/relay box.





-3. Check for continuity between test points 1 and 2.









Is there continuity?
-YES- Replace the ignition coil(s) Service and Repair.
-NO- Repair open in the IG1/IG_COIL_RLY_OUT wire between the ignition coil relay and ignition coil.

18. Engine compression check:

Engine compression check
-1. Do an engine compression inspection Engine Compression Test and Cylinder Leakage Test.
NOTE: Make sure the spark plugs are the correct part number for the vehicle. If the plugs are aftermarket or they are not the correct part number, replace all of the plugs and retest.

Is the engine compression OK?
-YES (Reproducible failure)- Go to step 19 (fuse check).
-YES (Intermittent failure)- Go to step 20 (relay check).
-NO- Check for wear or damage to these parts:
* Incorrect valve clearance
* Confirmation of cam timing
* Oil pressure relief valve
* Damage or worn cam lobes
* Damage or worn valve and seats
* Damage cylinder head gasket
* Damage or worn piston rings
* Damage or worn piston and cylinder bore

19. Fuse check:

Fuse check
-1. Check the following fuses.










Are the fuses OK?
-YES- The fuses are OK. Go to step 20.
-NO- Replace the blown fuse(s).

20. Relay check:

Relay check
-1. Test the following relays Testing and Inspection:
NOTE: In situations where the failure is difficult to reproduce, the following relays may have intermittent failure.

* Fuel shut-off solenoid valve relay
* Injector control module relay
* Ignition coil relay
* PGM-FI main relay 1
* PGM-FI subrelay

Are the relays OK?
-YES- Go to the Diagnostic Interview Fuel and Emissions Systems Diagnostic Interview Engine Stalls.
-NO- Replace any damaged relays.
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