Pinpoint Tests

Daytime Running Lamps (DRL)

Pinpoint Tests

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

Normal Operation

When the ignition is in the RUN state, the headlamps are not on, the transmission is not in PARK (P), the Smart Junction Box (SJB) provides a pulse-width modulated voltage to the low beam headlamps. This 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 Z : THE DRL (Daytime Running Lamps) ARE INOPERATIVE

Z1 VERIFY THE DRL (Daytime Running Lamps) OPERATION

- Ignition ON.

- Place the headlamp switch 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 Z2.

Z2 CHECK FOR RECORDED SJB (Smart Junction Box) DTCs

- Review the recorded results from the SJB (Smart Junction Box) self-test.

Are any DTCs present?

Yes
REFER to Body Control Systems.

No
GO to Z3.

Z3 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 Z4.

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

Z4 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.

Does the PID agree with the ignition switch positions?

Yes
GO to Z5.

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

Z5 CHECK THE TRANSMISSION GEAR INPUT

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: PCM DataLogger.

- Monitor the PCM 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 Z6.

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

Z6 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.