Diagnostic Aids

Use of Connector Test Adapter Kit (J 35616-A) is required when probing PCM or component harness connectors to prevent terminal damage.

DTC P1371 will set if high and low resolution circuits are shorted together. Inspect circuit before replacing component.

When an intermittent DTC P1371 occurs, a misfire will be apparent. To locate intermittent, use scan tool's snapshot feature. Try to duplicate the conditions under which the misfire is present. When reviewing captured data, watch for any abnormal high and low resolution timing pulses.

If DTC P1351 and/or P1361 is also set with P1371, and nor external fault can be found, replace PCM. If only DTC P1371 is set and distributor connectors are okay, replace distributor. If distributor components must be replaced, check distributor vent system operation.

If DTC is not present and a no-start condition is present, see ENGINE CRANKS, BUT DOES NOT START diagnosis in BASIC TESTING article.