Spark Timing Check

EEC-IV - Pinpoint Tests - All Vehicles 1989 17-321


Spark Timing Check Pinpoint P
Note Test


You should enter this Pinpoint Test only when directed here from Quick Test Step 4.0, when a Service Code 18 is received in Quick Test Step 5.0 or a code 49 is received in Quick Test Step 6.0.


Remember

To prevent the replacement of good components, be aware that the following non-EEC areas may be at fault:

^ Base Engine ^ Camshaft Sensor (CID)

^ Distributor ^ Single Hall Crankshaft Sensor (PIP)

^ TFI or DIS Module ^ Dual Hall Sensor


This Pinpoint Test is intended to diagnose only the following:

^ Harness Spout Circuit

^ Base Timing

^ Processor Assembly (-12A650-)







Pinpoint Test Schematic

17-322 1989 EEC-IV - Pinpoint Tests - All Vehicles


Pinpoint
Spark Timing Check
Test P