NS-8A Repairing A Start and Stall Condition
Perform TEST NS-SEL OR NS-7A Before ProceedingIMPORTANT NOTE: If the Powertrain Control Module has been changed and the correct VIN and mileage have not been programmed, a DTC will be set in the ABS and Air bag modules. In addition, if the vehicle is equipped with a Smart Key Immobilizer Module (SKIM), Secret Key data must be updated to enable starting.
For ABS and Air Bag systems:
ACTION:
Enter correct VIN and Mileage in PCM.
Erase codes in ABS and Air Bag modules.
For SKIM theft alarm:
ACTION:
Connect the DRB to the data link connector.
Go to Engine, Misc. and place the SKIM in secured access mode, by using the appropriate PIN code for this vehicle.
Select Update the Secret Key data, data will be transferred from the SKIM to the PCM.
At this point in the diagnostic test procedure, you have determined that all of the engine electrical systems are operating as designed; therefore, they are not the cause of the start and stall problem. The following additional items should be checked as possible mechanical causes of the no start condition. Any one or more or these items can produce a no start condition; none can be overlooked as a possible cause.
1. DISTRIBUTOR POSITION - must be within specifications*
2. ENGINE VALVE TIMING - must be within specifications
3. ENGINE COMPRESSION - must be within specifications
4. ENGINE EXHAUST - must be free of any restrictions
5. ENGINE PCV SYSTEM - must flow freely
6. ENGINE DRIVE SPROCKETS -must be properly positioned
7. FUEL - must be free of contamination
8. ENGINE SECONDARY IGNITION CHECK - must exhibit a normal scope pattern Always look for any Technical Service Bulletins that may relate to this condition.
CHECKING DISTRIBUTOR POSITION WITH DRB (V8 ONLY)
Connect the DRB to the Data Link Connector and select the set SYNC from the menu.
WARNING: The following test will be performed with the engine running: avoid contact with rotating components.
Start the engine and observe the DRB display. When the distributor is correctly positioned, the IN RANGE message should appear along with 00. If the distributor needs to be adjusted, loosen the distributor holdown clamp bolt. Rotate the distributor until reading is as close to 0° as possible and the IN RANGE message is displayed. Tighten the clamp bolt to 22.5 N.m (200 in. lbs.) torque.
NOTE: Setting the distributor position does not adjust the ignition timing. Ignition timing values are determined by the powertrain control module.