Symptom Checks

Perform the following:

• If vehicle is equipped with electric cooling fan, Start engine. Turn A/C on (if equipped). Cooling fan should be on. If cooling fan is not on, go to next symptom check.
• Perform Key On Engine Off (KOEO) Self-Test. See step 14) of DIAGNOSTIC SUB-ROUTINES. If continuous memory Diagnostic Trouble Code (11/111-10-11/111) was NOT displayed during KOEO Self-Test, perform appropriate CIRCUIT TEST in TESTS W/CODES article in the ENGINE PERFORMANCE section.
• Check base timing. See step 5) of DIAGNOSTIC SUB-ROUTINES.
• Check temperature gauge and sending unit.
• Check for binding/dragging brakes.
• Check transmission for overheating.
• Check for excessive vehicle load.
• Check for internal cylinder block and cylinder head leaks.