Pinpoint Tests
Daytime Running Lamps (DRL)
Pinpoint Tests
Pinpoint Test Z: The Daytime Running Lamps (DRL) Are Inoperative
Normal Operation
When the ignition switch is in the RUN position, the headlamps are not on, 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 Z: THE DRL ARE INOPERATIVE
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Z1 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 Z2.
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Z2 CHECK THE OPERATION OF THE HEADLAMPS (VEHICLES WITH HALOGEN HEADLAMPS) OR FOG LAMPS (VEHICLES WITH HID HEADLAMPS)
- Place the headlamp switch in the HEADLAMPS ON position (and engage the fog lamp switch for vehicles with HID headlamps) and observe the headlamps/fog lamps.
- Do the headlamps/fog lamps operate correctly?
Yes
GO to Z3.
No
REFER to Headlamps Testing and Inspection or Fog Lamps Testing and Inspection.
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Z3 CHECK THE IGNITION SWITCH INPUT
- Place the headlamp switch in the OFF position.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB ignition switch PIDs (IGN_A_ECU, IGN_O_ECU, IGN_R_ECU, IGN_S_ECU) while cycling the ignition switch through all its positions.
- Does the PID agree with the ignition switch positions?
Yes
For vehicles with an automatic transaxle, GO to Z4.
For vehicles with a manual transaxle, GO to Z5.
No
REFER to Steering Column to diagnose the ignition switch input.
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Z4 CHECK THE TRANSAXLE 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
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.
No
REFER to Automatic Transmission/Transaxle &/or Transmission Control Systems to diagnose the digital Transmission Range (TR) sensor input.
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Z5 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
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.
No
REFER to Instrument Panel, Gauges and Warning Indicators to diagnose the brake warning indicator.
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