PINPOINT TEST H : The DRL Are Inoperative
- H1 CHECK THE OPERATION OF THE HEADLAMPS AND FRONT TURN LAMPS
- Ignition OFF.
- Place the headlamp switch in the headlamps on position and activate the hazard lamp function.
Do the headlamps and front turn lamps operate correctly?
Yes GO to H2. No Refer to Exterior Lighting , Symptom Chart: Headlamps or Exterior Lighting , Symptom Chart: Turn Signal and Hazard Lamps. - H2 VERIFY THE DRL OPERATION
- Ignition ON.
- Place the headlamp switch in the off position and deactivate the hazard lamp function.
- Place the gear selector lever in any gear other than PARK (P).
Are the DRL illuminated?
Yes The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly. No GO to H3. - H3 ENABLE DRL USING PROGRAMMABLE PARAMETERS
- Using a scan tool, enable the DRL using BCM programmable parameters "DRL type."
- Place the headlamp switch in the off position and deactivate the hazard lamp function.
- Place the gear selector lever in any gear other than PARK (P).
Are the DRL illuminated?
Yes The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly. No GO to H4. - H4 CHECK THE TRANSMISSION GEAR INPUT
- Using a scan tool, view the PCM PIDs.
- Monitor the PCM transmission gear status PID (Transmission Range (TR)) while placing the gear selector lever through all its positions.
Does the PID agree with the gear selection?
Yes INSTALL a new BCM. REFER to Multifunction Electronic Modules - Without Intelligent Access or REFER to Multifunction Electronic Modules - With Intelligent Access . No REFER to Automatic Transmission 6F50/6F55 to diagnose the transmission range input.