Component Testing: Notes
NOTE:
To identify cruise control circuitry, seeFig 2
. To test control module, see CONTROL MODULE INPUT/OUTPUT SIGNAL
.
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) |
| 1 | Vent Valve | Operation Is Alternately Repeated While Cruise Control Is Operating |
| 2 | Safety Valve | Power Supply ON When Vehicle Is Stopped ON & OFF (0-12 Volts) |
| 2 | Safety Valve | Operation Is Alternately Repeated While Cruise Control Is Operating |
| 3 | Ignition Switch | Battery Voltage Present W/ Switch Turned On |
| 4 | Main Switch | When Main Switch Is Pressed, Battery Voltage Is Present |
| 4 | Main Switch | 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: |
| 8 | Brake Switch | a - Zero Volts With Brake Pedal Depressed |
| 8 | Brake Switch | b - Battery Voltage W/ Brake Pedal Released |
| 8 | Brake Switch | c - Zero Volts W/Clutch Pedal Depressed (M/T) |
| 8 | Brake Switch | d - B+ Voltage W/Clutch Pedal Released (M/T) |
| 8 | Brake Switch | e - Zero Volts When Select Lever In "P" or "N" (A/T) |
| 8 | Brake Switch | f - B+ Voltage In Any Position Except "P" Or "N" (A/T) |
| 9 | Inhibitor/Clutch Switch | Switch ON, Zero Volts |
| 11 | Vacuum Valve | Power Supply ON When Vehicle Is Stopped ON & OFF (0-12 Volts) |
| 11 | Vacuum Valve | 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 | 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: |
| 19 | Stoplight Switch | a - Depress Brake To Check For B+ Voltage |
| 19 | Stoplight Switch | b - Zero Volts Present W/Brake Pedal Pressed |
| 20 | Ground | " |