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Turn Signal Lamps

NOTE:

The turn signal switch is integral to the left multi-function switch/SCM, which communicates with the EMIC/CCN over the LIN data bus. Before performing any of the following tests, determine whether the other functions of the left multi-function switch/SCM are operational. If the other left multi-function switch/SCM functions are ineffective, diagnose and repair that problem before attempting to repair the Turn Signal Lamps.

CONDITION POSSIBLE CAUSES CORRECTION
ONE TURN SIGNAL LAMP DOES NOT ILLUMINATE 1. Ineffective or missing bulb. 1. Test and replace turn signal bulb if required.
2. Ineffective ground circuit. 2. Test and repair open ground circuit if required.
3. Ineffective feed circuit. 3. Test and repair open right or left turn signal feed circuit if required.
4. Ineffective TIPM inputs or outputs. 4. Use a diagnostic scan tool to test the TIPM inputs and outputs. Refer to the appropriate diagnostic information.
ALL RIGHT SIDE OR ALL LEFT SIDE TURN SIGNAL LAMPS (OR BOTH SIDES) DO NOT FLASH 1. Ineffective feed circuit. 1. Test and repair open right or left turn signal feed circuit if required.
2. Ineffective EMIC (CCN) inputs or outputs. 2. Use a diagnostic scan tool and the appropriate diagnostic information for further EMIC diagnosis.
3. Ineffective TIPM inputs or outputs. 3. Use a diagnostic scan tool to test the TIPM inputs and outputs. Refer to the appropriate diagnostic information.
ALL RIGHT SIDE OR ALL LEFT SIDE TURN SIGNALS FLASH TOO RAPIDLY (MORE THAN 100 FLASHES PER MINUTE) 1. Ineffective or missing bulb. 1. Test and replace turn signal bulb if required.
2. Ineffective ground circuit. 2. Test and repair open bulb ground circuit if required.
3. Ineffective feed circuit. 3. Test and repair open right or left turn signal feed circuit if required.
TURN SIGNALS DO NOT AUTOMATICALLY CANCEL 1. Ineffective cancel cam. 1. Inspect and replace the turn signal cancel cam (clockspring) if required.
  2. Ineffective cancel actuator. 2. Inspect and replace the turn signal cancel actuator (left multi-function switch) if required.
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