A Symptoms - Lighting Systems

SYMPTOMS

IMPORTANT: The following steps must be completed before using the symptom table.

- Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information before using the symptom tables in order to verify that all of the following are true:
- There are no DTCs set.
- The control modules can communicate via the serial data link. Diagnostic System Check - Vehicle
- Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following:
- Interior Lighting Systems Description and Operation
- Exterior Lighting Systems Description and Operation

Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the lighting system.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Daytime Running Lamps (DRL) Always On (Domestic/Canada) Daytime Running Lamps (DRL) Always On (Norway/Sweden)
- Daytime Running Lamps (DRL) Inoperative (Domestic/Canada) Daytime Running Lamps (DRL) Inoperative (Norway/Sweden)
- Fog Lamp Indicator Always On
- Fog Lamp Indicator Inoperative
- Fog Lamp Indicator Always On - Rear
- Fog Lamp Indicator Inoperative - Rear
- Fog Lamps Always On
- Fog Lamps Inoperative
- Fog Lamps Always On - Rear
- Fog Lamps Inoperative - Rear
- Hazard Lamps Always On
- Hazard Lamps Inoperative
- Headlamps Always On - Low or High Beam
- Headlamps Inoperative - High Beams
- Headlamps Inoperative - Low Beams (Standard or W/TR7-TT6) Headlamps Inoperative - Low Beams (W/Leveling (TR7) and HID (TT6)) Headlamps Inoperative - Low Beams (W/HID (TT6))
- Headlamps Inoperative - Flash to Pass
- Headlamps Suggested Message On in Daylight Conditions
- Headlight Leveling Inoperative
- High Beam Indicator Always On
- High Beam Indicator Inoperative
- Interior Backlighting Does Not Dim
- Interior Backlighting Inoperative
- License Lamps Inoperative
- Lights On Indicator Always On
- Lights On Indicator Inoperative
- Park Lamps Always On
- Park Lamps Inoperative
- Position Lamps Inoperative
- Reading Lamp(s) Inoperative
- Repeater Lamps Inoperative
- Stop Lamps Always On
- Stop Lamps Inoperative
- Turn Signal Lamps and/or Indicators Always On or Flashing
- Turn Signal Lamps and/or Indicators Inoperative
- Twilight Sentinel Inoperative
- Vanity Mirror Lamp(s) Always On
- Vanity Mirror Lamp(s) Inoperative