Testing & Diagnosis: Notes
NOTE:
To identify cruise control pin connectors, see Fig 1
. To identify cruise control circuitry, see Fig 2
. To test control module, see CONTROL MODULE INPUT/OUTPUT SIGNAL table.
CONTROL MODULE INPUT/OUTPUT SIGNAL
| Pin No. | Description | Measuring Conditions & I/O Signals (Ignition Switch ON, Engine Idling) |
|---|---|---|
| 1 | Vent Valve | Power Supply ON When Vehicle Is Stopped ON & OFF (0-12 Volts) Operation Is Alternately Repeated While Cruise Control Is Operating |
| 2 | Safety Valve | Power Supply ON When Vehicle Is Stopped ON & OFF (0-12 Volts) Operation Is Alternately Repeated While Cruise Control Is Operating |
| 3 | Ignition Switch | Battery Voltage Present When Switch Is Turned On |
| 4 | Main Switch | When Main Switch Is Pressed, Battery Voltage Is Present When Main Switch Is OFF, Zero Volts Present |
| 5 | Power Supply To Vacuum System | Main Switch Pressed, Battery Voltage Present |
| 6 | SET/COAST Switch | With Switch ON, Battery Voltage Present. With Switch OFF, Zero Volts Present |
| 7 | RESUME/ACCEL Switch | With Switch ON, Battery Voltage Present. With Switch OFF, Zero Volts Present |
| 8 | Brake Switch | Any Gear Except "P" Or "N" (A/T). Clutch Pedal Out (M/T) Main Switch ON. Check For:
|
| 9 | Inhibitor/ Clutch Switch | Switch ON, Zero Volts |
| 11 | Vacuum Valve | Power Supply ON When Vehicle Is Stopped ON & OFF (0-12 Volts) Operation Is Alternately Repeated While Cruise Control Is Operating |
| 12 | A/T Control (Set Signal) | ECM Emits A Ground-Level Signal While Driving At Least 25 MPH With Set Switch ON |
| 13 | Ground | -- |
| 14 | Select Monitor (Output) | -- |
| 15 | Select Monitor (Input) | -- |
| 18 | Vehicle Speed Sensor | When All 4 Wheels Are Off Ground & Any Wheel Is Rotated Manually, 0-5 Volt Pulse Signals Are Alternately Sent To Cruise Control Module |
| 19 | Stoplight Switch | With Ignition Switch ON Or OFF:
|
| 20 | Ground | -- |