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Home >> Eagle >> 1998 >> Talon Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Self-Diagnostics - With Codes >> DTC Test >> Test TC-87A: Speed Control Switch Always Low
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Test TC-87A: Speed Control Switch Always Low

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
  1. If vehicle is an Avenger, Sebring Coupe or Talon, go to step 6)  . If vehicle is a Breeze, Cirrus, Neon, Sebring Convertible or Stratus, go to next step.
  2. Record all DTCs and freeze frame data. Using scan tool, erase DTCs. Using scan tool, read speed control switch volts. If voltage is less than one volt, go to step 4)  . If voltage is one volt or more, go to next step.
  3. Condition to set trouble code is not present at this time. SPEED CONTROL SWITCH ALWAYS LOW DTC sets if speed control switch voltage is less than 4.5 volts for 2 minutes. Possible causes are: speed control switch circuit shorted, Powertrain Control Module (PCM) failure, open speed control switch ground circuit, or open or shorted speed control switch. See INACTIVE TROUBLE CODE CONDITION . Test is complete. Perform TEST VER-4A .
  4. Disconnect speed control switch 2-pin clockspring connector. Observe scan tool voltage reading. If voltage changed to 5 volts, replace speed control switch. Perform TEST VER-4A . If voltage did not change to 5 volts, go to next step.
  5. Turn ignition off. Using an ohmmeter, check resistance between speed control switch 2-pin clockspring connector terminals (PCM side). See SPEED CONTROL SWITCH CONNECTOR WIRE IDENTIFICATION  table. If resistance is 5 ohms or more, go to TEST TC-87B . If resistance is less than 5 ohms, repair short to ground on speed control switch signal circuit. Perform TEST VER-4A .
  6. Record all DTCs and freeze frame data. Using scan tool, erase DTCs. Turn speed control switch on. Using scan tool, read speed control switch volts. If voltage is less than one volt, go to step 8)  . If voltage is one volt or more, go to next step.
  7. Condition to set trouble code is not present at this time. SPEED CONTROL SWITCH ALWAYS LOW DTC sets if speed control switch voltage is less than 4.5 volts for 2 minutes. Possible causes are: speed control switch circuit shorted, Powertrain Control Module (PCM) failure, open speed control switch ground circuit, or open or shorted speed control switch. See INACTIVE TROUBLE CODE CONDITION . Test is complete. Perform TEST VER-4A .
  8. Disconnect speed control switch 2-pin clockspring connector. Observe scan tool voltage reading. If voltage changed to 5 volts, replace speed control switch. Perform TEST VER-4A . If voltage did not change to 5 volts, go to next step.
  9. Turn ignition off. Using an ohmmeter, check resistance between speed control switch 2-pin clockspring connector terminals (PCM side). See SPEED CONTROL SWITCH CONNECTOR WIRE IDENTIFICATION  table. If resistance is 5 ohms or more, go to TEST TC-87B . If resistance is less than 5 ohms, repair short to ground on speed control switch signal circuit. Perform TEST VER-4A .
SPEED CONTROL SWITCH CONNECTOR WIRE IDENTIFICATION

Application Wire Color
Avenger, Sebring Coupe & Talon
Speed Control Switch Signal Circuit Light Blue
Ground Circuit Black/Gray
Breeze, Cirrus & Stratus
Speed Control Switch Signal Circuit Pink/Light Green
Ground Circuit Black/Light Green
Neon & Sebring Conv.
Speed Control Switch Signal Circuit Red/Light Green
Ground Circuit Black/Light Green
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