Section 1 (Engine Controls - Tests W/Codes): Summary
WARNING: This page is about a different car, the 1993 Mazda Navajo. However, it is still accessible from the selected car via links, so may be relevant.
If no service code or Code 111 (pass code) is present, but driveability problem still exists, proceed to EEC-IV DIAGNOSIS BY SYMPTOM table. If driveability problem still cannot be located, go to TESTS W/O CODES article for diagnosis by symptoms (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.
EEC-IV DIAGNOSIS BY SYMPTOM
| Symptom | Application | Circuit Test | ||
|---|---|---|---|---|
| A/C Does Not Cut Off During WOT | All | KM - Step 8) | ||
| A/C Not Functioning | All | KM - Step 1) | ||
| CHECK ENGINE Light Always On | (1) All | ML - Step 1) | ||
| CHECK ENGINE Light Flashing With Erratic Idle | (1) All | ML - Step 8) | ||
| CHECK ENGINE Light Never On | (1) All | ML - Step 2) | ||
| CHECK ENGINE Light On Intermittently | (1) All | ML - Step 7) | ||
| Engine Hesitates After Hot Restart | (1) All | H - Step 13) | ||
| Engine Hesitation | (1) All | S - Step 1) | ||
| Engine Lacks Power Or Loses Power | (1) All | S - Step 1) | ||
| Engine Miss At Idle, Acceleration Or Cruise | (1) All | S - Step 1) | ||
| Engine Runs Rough At All Times | (1) All | S - Step 2) | ||
| Engine Stalls | All | S - Step 2) | ||
| Engine Surge At Acceleration Or Cruise | (1) All | S - Step 1) | ||
| Erratic RPM | (1) All | S - Step 2) | ||
| Gasoline Fumes | With CANP | KD - Step 1) | ||
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