Pin Voltage Charts
NOTE:
Unless stated otherwise in testing procedures, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. Voltage readings may vary slightly due to battery condition or charging rate.
ECM VOLTAGE SPECIFICATIONS
| Measure Between ECM Terminals (1) | Condition | Volts | ||
|---|---|---|---|---|
| A33 & B69 | Always | 9-14 | ||
| A1 & B69 | Ignition On | 9-14 | ||
| A31 & B69 | Ignition On | 9-14 | ||
| A32 & B69 | Ignition On | 9-14 | ||
| B41 & B65 | Ignition On | 4.5-5.5 | ||
| B64 & B65 | Ignition On, Throttle Fully Open | 9-14 | ||
| B64 & B65 | Ign. On, Throttle Fully Closed | 3 Or Less | ||
| B63 & B65 | Ignition On, Throttle Fully Open | 9-14 | ||
| B63 & B65 | Ignition On, Throttle Fully Closed | 3 Or Less | ||
| B43 & B65 | Ignition On, Throttle Fully Closed | .3-.8 | ||
| B43 & B65 | Ignition On, Throttle Valve Open | 3.2-4.9 | ||
| B42 & B65 | Ignition On, Throttle Fully Closed | .3-.8 | ||
| B42 & B65 | Ignition On, Throttle Valve Open | 3.2-4.9 | ||
| B66 & B69 | Engine Idling | Pulse Gen. | ||
| B45 & B65 | Engine Idling, Intake Air Temp. 68°F (20°C) | .5-3.4 | ||
| B44 & B65 | Engine Idling, Coolant Temp. 176°F (80°C) | 0.2-1 | ||
| B77 & B69 | Engine Cranking | 6 Or More | ||
| B20 & B80 | Ignition On | 9-14 | ||
| B19 & B80 | Ignition On | 9-14 | ||
| B18 & B80 | Ignition On | 9-14 | ||
| B17 & B80 | Ignition On | 9-14 | ||
| B20 & B80 | Engine Idling | Pulse Gen. | ||
| B19 & B80 | Engine Idling | Pulse Gen. | ||
| B18 & B80 | Engine Idling | Pulse Gen. | ||
| B17 & B80 | Engine Idling | Pulse Gen. | ||
| B57 & B69 | Engine Idling | Pulse Gen. | ||
| B56 & B69 | Engine Idling | Pulse Gen. | ||
| B58 & B69 | Engine Idling | Pulse Gen. | ||
| B58 & B69 | Ignition On | 2 Or Less | ||
| B59 & B69 | Engine Idling | Pulse Gen. | ||
| B59 & B69 | Ignition On | 2 Or Less | ||
| B26 & B6 | Engine Idling | Pulse Gen. | ||
| B25 & B6 | Engine Idling | Pulse Gen. | ||
| B27 & B7 | Engine Idling | Pulse Gen. | ||
| A24 & B69 | Ignition On | 9-14 | ||
| A22 & B69 | Ignition On | 2 Or Less | ||
| A22 & B69 | Engine Idling | Pulse Gen. | ||
| A21 & B69 | Engine Idling | 7 Or More | ||
| B73 & B69 | Ignition On | 9-14 | ||
| B73 & B69 | High Temperature Restart | 2 Or Less | ||
| B74 & B69 | Engine Idling | 9-14 | ||
| B24 & B65 | Oil Temp At 176°F (80°C) | .2-1.0 | ||
| B35 & B69 | Ignition On | 9-14 | ||
| B34 & B69 | Ignition On | 9-14 | ||
| B33 & B69 | Ignition On | 9-14 | ||
| B32 & B69 | Ignition On | 9-14 | ||
| B29 & B69 | Maintain 2500 RPM 2 Minutes With Engine Warm, Then Idle | 1.8-3.2 | ||
| B28 & B69 | Maintain 2500 RPM 2 Minutes With Engine Warm, Then Idle | 1.8-3.2 | ||
| B48 & B69 | Maintain 2500 RPM 2 Minutes With Engine Warm | Pulse Gen. | ||
| B47 & B69 | Maintain 2500 RPM 2 Minutes With Engine Warm | Pulse Gen. | ||
| B71 & B80 | Ignition On | 9-14 | ||
| B72 & B80 | Ignition On | 9-14 | ||
| B52 & B80 | Ignition On | 9-14 | ||
| B53 & B80 | Ignition On | 9-14 | ||
| B71 & B80 | Engine Idling | 3 Or Less | ||
| B72 & B80 | Engine Idling | 3 Or Less | ||
| B52 & B80 | Engine Idling | 3 Or Less | ||
| B53 & B80 | Engine Idling | 3 Or Less | ||
| B39 & B69 | Ignition On | 9-14 | ||
| B38 & B69 | Ignition On | 9-14 | ||
| B37 & B69 | Ignition On | 9-14 | ||
| B36 & B69 | Ignition On | 9-14 | ||
| B50 & B69 | Engine Idling | Pulse Gen. | ||
| B49 & B69 | Engine Idling | Pulse Gen. | ||
| B76 & B69 | Ignition On, Gearshift Not In "P" Or "N" | 9-14 | ||
| B76 & B69 | Ignition On, Gearshift In "P" Or "N" | 3 Or Less | ||
| A2 & B69 | Ignition On, Rotate Driving Wheel | Pulse Gen. | ||
| A20 & B69 | Ignition On | 9-14 | ||
| A19 & B69 | Ignition On | 9-14 | ||
| A6 & B69 | Ignition On | 3 Or Less | ||
| A6 & B69 | Engine Idling | 9-14 | ||
| A11 & B69 | Ignition On | 9-14 | ||
| A12 & B69 | Ignition On | 9-14 | ||
| A34 & B69 | Engine Idling, A/C On | 2 Or Less | ||
| A34 & B69 | Engine Idling, A/C Off | 9-14 | ||
| A23 & B69 | Engine Idling, A/C On | 2 Or Less | ||
| A23 & B69 | Engine Idling, A/C Off | 9-14 | ||
| A37 & B69 | Ignition On | 9-14 | ||
| A40 & B65 | Ignition On, Throttle Closed | .3-.8 | ||
| A40 & B65 | Ignition On, Throttle Open | 3.2-4.9 | ||
| A39 & B65 | Ignition On, Throttle Closed | .3-.8 | ||
| A39 & B65 | Ignition On, Throttle Open | 3.2-4.9 | ||
| A38 & B69 | Ignition On | 4.5-5.5 | ||
|
||||