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Trouble Shooting: Notes

If no faults were found during testing of individual components, fault may be in ECU control circuit. Inspect each input signal to ECU. If no faults are found in input signals, replace ECU.

CONTROL UNIT INPUT CHECKS

Circuit Go To Check No.
Frequency Solenoids A & B
Manual 1, 4, 6, 7, 8, 10, 11, 12, 13
Automatic 1, 4, 5, 7, 8, 10, 11, 12, 13
Frequency Solenoid C 1, 2, 4, 5, 10, 11, 14
Feedback Control Solenoid
49-State
Manual 1, 4, 6, 8, 11
Automatic 1, 4, 5, 8, 9, 11
California
Manual 1, 4, 6, 7, 8, 11
Automatic 1, 4, 5, 7, 8, 11
A/T Idle Boost Solenoid 1, 4, 5, 7, 10, 11, 14
A/C Idle Boost Solenoid 1, 4, 7, 10, 11, 14
Air Suction Solenoid
49-State
Manual 1, 4, 7, 8, 10, 11, 12
Automatic 1, 4, 7, 9, 10, 11, 12
California 1, 4, 7, 8, 10, 11, 12
Anti-Afterburn Solenoid
Manual 1, 10, 11
Automatic 1, 5, 11
Cranking Leak Solenoid 1, 3, 4, 10, 11, 12
Primary Slow Mixture
Cut-Off Solenoid
Manual 1, 4, 6, 7, 8, 10, 11
Automatic 1, 4, 5, 7, 8, 10, 11
EFE Heater 1, 11