Pinpoint Tests
Daytime Running Lamps (DRL)
Pinpoint Tests
Pinpoint Test AC: 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), the transaxle is not in PARK (P) (automatic transaxle) or the parking brake is not applied (manual transaxle), 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
- Ignition switch input
- Transaxle gear input (automatic transaxle)
- Parking brake switch input (manual transaxle)
- SJB
PINPOINT TEST AC: THE DRL ARE INOPERATIVE
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AC1 VERIFY THE DRL OPERATION
- Ignition ON.
- Place the headlamp switch in the OFF position.
- If equipped with an automatic transaxle, place the gear selector lever in any gear other than PARK (P).
- If equipped with a manual transaxle, release the parking brake.
- Do the DRL illuminate?
Yes
The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.
No
GO to AC2.
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AC2 CHECK FOR RECORDED SJB DTCs
- Review the recorded results from the SJB self-test.
- Are any DTCs present?
Yes
REFER to Body Control Systems.
No
GO to AC3.
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AC3 CHECK THE OPERATION OF THE HEADLAMPS
- Place the headlamp switch in each of its positions (including autolamps if equipped) and observe the headlamps.
- Do the headlamps and autolamps (if equipped) operate correctly?
Yes
GO to AC4.
No
REFER to Headlamps Testing and Inspection or Autolamps Testing and Inspection.
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AC4 CHECK THE IGNITION SWITCH INPUT
- Place the headlamp switch in the OFF position.
- Enter the following diagnostic mode on the scan tool: DataLogger.
- Monitor the SJB ignition switch PID (IGN_A_ECU, IGN_O_ECU, IGN_R_ECU) while cycling the ignition switch through all positions (states).
- Does the PID agree with the ignition switch positions?
Yes
For vehicles with an automatic transaxle, GO to AC5.
For vehicles with a manual transaxle, GO to AC6.
No
REFER to Steering Column. Testing and Inspection
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AC5 CHECK THE TRANSAXLE GEAR INPUT
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: 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
INSTALL a new SJB. TEST the system for normal operation.
No
Refer to Transmission Control Systems. Testing and Inspection
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AC6 CHECK THE BRAKE WARNING INDICATOR OPERATION
- Ignition ON.
- Apply and release the parking brake while observing the brake warning indicator.
- Does the brake warning indicator operate correctly?
Yes
GO to AC7
No
REFER to Instrument Panel, Gauges and Warning Indicators.
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AC7 CHECK THE SJB FOR DRL CONFIGURATION
- Enter the following diagnostic mode on the scan tool: SJB Module Programming.
- Check the SJB configuration and make sure the DRL feature is enabled.
- Is the SJB DRL configuration enabled?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
ENABLE the DRL configuration. TEST the system for normal operation.
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