Pinpoint Tests

Daytime Running Lamps (DRL)

Pinpoint Tests

Pinpoint Test AF: The Daytime Running Lamps (DRL) Are Inoperative

Normal Operation

When the ignition switch is in the RUN position, the headlamps are not on (from the autolamp system or manual control from the headlamp switch), and the transmission is not in PARK (P), the Smart Junction Box (SJB) illuminates the headlamps at a reduced intensity.

This pinpoint test is intended to diagnose the following:

- Exterior lighting system input/output

- SJB (Smart Junction Box) configuration

- Ignition switch input

- Transmission gear input

- SJB (Smart Junction Box)

PINPOINT TEST AF : THE DRL (Daytime Running Lamps) ARE INOPERATIVE

AF1 VERIFY THE DRL (Daytime Running Lamps) OPERATION

- Ignition ON.

- Make sure the headlamp switch is in the OFF position.

- Place the gear selector lever in any gear other than PARK (P).

Do the DRL (Daytime Running Lamps) illuminate?

Yes
The system is operating correctly. INFORM the customer of the conditions required for the DRL (Daytime Running Lamps) to operate correctly.

No
GO to AF2.

AF2 CHECK THE OPERATION OF THE HEADLAMPS

- Place the headlamp switch in the HEADLAMPS ON position and observe the headlamps.

Do the headlamps operate correctly?

Yes
GO to AF3.

No
REFER to Headlamps Special Tool(s) Used With Diagnostics.

AF3 CHECK THE IGNITION SWITCH INPUT

- Place the headlamp switch in the OFF position.

- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.

- Monitor the SJB (Smart Junction Box) ignition switch PID (IGN_O_ECU, IGN_A_ECU, IGN_R_ECU, and IGN_S_ECU) while cycling the ignition switch through all its positions.

Do the PIDs agree with the ignition switch positions?

Yes
GO to AF4.

No
REFER to Steering Column to diagnose the input from the ignition switch.

AF4 CHECK THE TRANSMISSION GEAR INPUT

- Enter the following diagnostic mode on the scan tool: TCM (Transmission Control Module) DataLogger.

- Monitor the TCM (Transmission Control Module) transmission gear status PID (TR) while placing the gear selector lever through all its positions.

Does the PID agree with the gear selection?

Yes
GO to AF5.

No
REFER to Automatic Transmission/Transaxle &/or Transmission Control Systems to diagnose the transmission range input.

AF5 CHECK THE SJB (Smart Junction Box) FOR DRL (Daytime Running Lamps) CONFIGURATION

- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) Configuration.

- Check the SJB (Smart Junction Box) configuration and make sure the DRL (Daytime Running Lamps) feature is enabled.

Is the SJB (Smart Junction Box) DRL (Daytime Running Lamps) configuration enabled?

Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.

No
ENABLE the DRL (Daytime Running Lamps) configuration. TEST the system for normal operation.