Pinpoint Test N: One Turn Signal/Hazard Lamp Is Inoperative/Always On
Turn Signal and Hazard Lamps
Pinpoint Test N: One Turn Signal/Hazard Lamp Is Inoperative/Always On
Refer to Wiring Diagrams Set 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information. Electrical Diagrams
Normal Operation
When the Smart Junction Box (SJB) detects the multifunction switch is in the LH TURN position, the SJB (Smart Junction Box) provides voltage to the LH front turn lamp. When the SJB (Smart Junction Box) detects the multifunction switch is in the RH TURN position, the SJB (Smart Junction Box) provides voltage to the RH front turn lamp. The rear turn lamps are controlled utilizing the rear stoplamp circuitry.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Bulb holder
- SJB (Smart Junction Box)
PINPOINT TEST N : ONE TURN SIGNAL/HAZARD LAMP IS INOPERATIVE/ALWAYS ON
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
N1 CHECK THE STOPLAMPS
- Apply and release the brake pedal while observing the stoplamps.
Do the stoplamps operate correctly?
Yes
GO to N2.
No
REFER to Stoplamps Special Tool(s) Used With Diagnostics.
N2 DETERMINE IF A TURN LAMP IS ALWAYS ON
- Ignition ON.
- Monitor the turn lamps.
Is either front turn lamp always on?
Yes
GO to N3.
No
GO to N4.
N3 CHECK THE SJB (Smart Junction Box) TURN LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280F.
- Ignition ON.
Does the front turn lamp in question continue to illuminate?
Yes
REPAIR circuit CLS21 (BU/GN) (LH front turn lamp) or circuit CLS25 (YE/VT) (RH front turn lamp) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
No
GO to N11.
N4 USE THE RECORDED DTCs FROM THE SJB (Smart Junction Box) SELF-TEST
- Check the recorded results from the SJB (Smart Junction Box) on-demand self-test.
Was DTC B2A27 or DTC B2A29 present?
Yes
GO to N5.
No
GO to N8.
N5 CHECK FOR VOLTAGE TO THE TURN LAMP
- Ignition OFF.
- Disconnect: Inoperative Turn Lamp.
- Turn the hazard lamps on.
- For the LH turn lamp, measure the voltage between the LH front turn lamp C1115-3, circuit CLS21 (BU/GN), harness side and ground.
- For the RH turn lamp, measure the voltage between the RH front turn lamp C1116-3, circuit CLS25 (YE/VT), harness side and ground.
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
GO to N7.
No
GO to N6.
N6 CHECK THE SJB (Smart Junction Box) TURN LAMP OUTPUT CIRCUIT FOR AN OPEN
- Turn the hazard lamps off.
- Disconnect: SJB (Smart Junction Box) C2280F.
- Measure the resistance between the LH front turn lamp C1115-3, circuit CLS21 (BU/GN), harness side and the SJB (Smart Junction Box) C2280F-21, circuit CLS21 (BU/GN), harness side; or between the RH front turn lamp C1116-3, circuit CLS21 (BU/GN), harness side and the SJB (Smart Junction Box) C2280F-23, circuit CLS25 (YE/VT), harness side.
Is the resistance less than 5 ohms?
Yes
GO to N11.
No
REPAIR circuit CLS21 (BU/GN) (LH turn) or circuit CLS25 (YE/VT) (RH turn) for an open. TEST the system for normal operation.
N7 CHECK FOR VOLTAGE TO THE TURN LAMP USING THE CONNECTOR GROUND
- For the LH turn lamp, measure the voltage between the LH front turn lamp C1115-3, circuit CLS21 (BU/GN), harness side and the LH front turn lamp C1115-1, circuit GD120 (BK/GN), harness side.
- For the RH turn lamp, measure the voltage between the RH front turn lamp C1116-3, circuit CLS25 (YE/VT), harness side and the RH front turn lamp C1116-1, circuit GD123 (BK/GY), harness side.
Is the voltage greater than 10 volts?
Yes
INSTALL a new bulb holder. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR circuit CLS21 (BU/GN) (LH front turn lamp) or circuit CLS25 (YE/VT) (RH front turn lamp) for an open. TEST the system for normal operation.
N8 CHECK FOR VOLTAGE TO THE TURN LAMP (NO OPEN DTC PRESENT)
- Ignition OFF.
- Disconnect: Inoperative Turn Lamp.
- Turn the hazard lamps on.
- For the LH turn lamp, measure the voltage between the LH front turn lamp C1115-3, circuit CLS21 (BU/GN), harness side and ground.
- For the RH turn lamp, measure the voltage between the RH front turn lamp C1116-3, circuit CLS25 (YE/VT), harness side and ground.
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
INSTALL a new bulb holder. CLEAR the DTCs. REPEAT the self-test.
No
GO to N9.
N9 REPEAT THE SELF-TEST AND RECHECK FOR VOLTAGE TO THE TURN LAMP
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) Self-Test.
- Clear any DTCs and repeat the on-demand self-test (required to enable the turn lamp output driver if DTC B106E is present).
- Turn the hazard lamps on.
- For the LH turn lamp, measure the voltage between the LH front turn lamp C1115-3, circuit CLS21 (BU/GN), harness side and ground.
- For the RH turn lamp, measure the voltage between the RH front turn lamp C1116-3, circuit CLS25 (YE/VT), harness side and ground.
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
INSTALL a new bulb holder. CLEAR the DTCs. REPEAT the self-test.
No
GO to N10.
N10 CHECK THE SJB (Smart Junction Box) TURN LAMP OUTPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280F.
- Measure the resistance between the SJB (Smart Junction Box) C2280F-21, circuit CLS21 (BU/GN), harness side and ground; or between the SJB (Smart Junction Box) C2280F-23, circuit CLS25 (YE/VT), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to N11.
No
REPAIR circuit CLS21 (BU/GN) (LH turn lamp) or CLS25 (YE/VT) (RH turn lamp) for a short to ground. After the repair:
If no DTCs are present, TEST the system for normal operation
If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the turn lamp output driver if DTC B106E is present). TEST the system for normal operation.
If DTC B106F is present, INSTALL a new SJB (Smart Junction Box).
N11 CHECK THE TURN LAMP CIRCUIT FOR A SHORT TO GROUND
- Disconnect all the SJB (Smart Junction Box) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB (Smart Junction Box) connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.