Pinpoint Test P: One Turn Signal/Hazard Lamp Is Inoperative/Always On
Turn Signal and Hazard Lamps
Pinpoint Test P: One Turn Signal/Hazard Lamp Is Inoperative/Always On
Normal Operation
When the Smart Junction Box (SJB) detects the multifunction switch in the LH TURN position, the SJB (Smart Junction Box) provides voltage to the LH front and rear turn lamps.
When the SJB (Smart Junction Box) detects the multifunction switch in the RH TURN position, the SJB (Smart Junction Box) provides voltage to the RH front and rear turn lamps.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Bulb holder
- Rear lamp jumper harness
- SJB (Smart Junction Box)
PINPOINT TEST P : 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.
P1 CHECK THE STOPLAMPS
- Apply and release the brake pedal while observing the stoplamps.
Do the stoplamps operate correctly?
Yes
GO to P2.
No
REFER to Stoplamps Special Tool(s) Used With Diagnostics.
P2 DETERMINE IF A TURN LAMP IS ALWAYS ON
- Ignition ON.
- Monitor the turn lamps.
Is any turn lamp always on?
Yes
GO to P3.
No
GO to P4.
P3 CHECK THE TURN SIGNAL LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
- Retrieve the DTCs from the on-demand self-test. Refer to the following table.
DTC Associated Lamp Circuit B2A27 RH front CLS25 (YE/VT) B2A29 LH front CLS21 (BU/GN) B2045 LH rear CLS20 (BN/BU) B2047 RH rear CLS24 (BN/WH) B2049 LH rear CLS23 (GY/OG) B2051 RH rear CLS27 (GN/OG)
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280F (DTC B2A27 or DTC B2A29).
- Disconnect: SJB (Smart Junction Box) C2280C (DTC B2049 or DTC B2051).
- Disconnect: SJB (Smart Junction Box) C2280D (DTC B2045 or DTC B2047).
- Ignition ON.
Does the turn lamp in question continue to illuminate?
Yes
REPAIR the turn lamp voltage supply circuit in question. CLEAR the DTCs. REPEAT the self-test.
No
GO to P11.
P4 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.
Is DTC B2045, B2047, B2049, B2051, B2A27 or B2A29 present?
Yes
GO to P5.
No
GO to P8.
P5 CHECK FOR VOLTAGE TO THE TURN LAMP (OPEN DTC PRESENT)
- Ignition OFF.
- Disconnect: Inoperative Turn Lamp.
- Turn the hazard lamps on.
- Measure the voltage between the inoperative turn lamp, harness side and ground as follows:
DTC Inoperative Turn Lamp Connector-Pin Circuit B2A29 LH front C1023-3CLS21 (BU/GN) B2A27 RH front C1043-3CLS25 (YE/VT) B2045 LH rear C414-6CLS20 (BN/BU) B2047 RH rear C417-6CLS24 (BN/WH) B2049 LH rear C414-5CLS23 (GY/OG) B2051 RH rear C417-5CLS27 (GN/OG)
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
GO to P7.
No
GO to P6.
P6 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Turn the hazard lamps off.
- Disconnect: SJB (Smart Junction Box) C2280F (DTC B2A27 or DTC B2A29).
- Disconnect: SJB (Smart Junction Box) C2280C (DTC B2049 or DTC B2051).
- Disconnect: SJB (Smart Junction Box) C2280D (DTC B2045 or DTC B2047).
- Measure the resistance between the inoperative turn lamp, harness side and the SJB (Smart Junction Box), harness side as follows:
DTC Inoperative Turn Lamp Connector-Pin SJB (Smart Junction Box) Connector-Pin Circuit B2A29 LH front C1023-3C2280F-21 CLS21 (BU/GN) B2A27 RH front C1043-3C2280F-23 CLS25 (YE/VT) B2045 LH rear C414-6C2280D-25 CLS20 (BN/BU) B2047 RH rear C417-6C2280D-26 CLS24 (BN/WH) B2049 LH rear C414-5C2280C-21 CLS23 (GY/OG) B2051 RH rear C417-5C2280C-19 CLS27 (GN/OG)
Is the resistance less than 5 ohms?
Yes
GO to P11.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test
P7 CHECK THE FOR VOLTAGE TO THE TURN LAMP USING THE CONNECTOR GROUND
- Measure the voltage between the inoperative turn lamp pins, harness side and ground as follows:
DTC Inoperative Turn Lamp Connector-Pin/ Circuit Inoperative Turn Lamp Connector-Pin/ Circuit B2A29 LH front C1023-3 CLS21 (BU/GN) LH front C1023-1 GD120 (BK/GN) B2A27 RH front C1043-3 CLS25 (YE/VT) RH front C1043-1 GD123 (BK/GY) B2045 LH rear C414-6 CLS20 (BN/BU) LH rear C414-1 GD148 (BK/YE) B2047 RH rear C417-6 CLS24 (BN/WH) RH rear C417-1 GD149 (BK/GY) B2049 LH rear C414-5 CLS23 (GY/OG) LH rear C414-1 GD148 (BK/YE) B2051 RH rear C417-5 CLS27 (GN/OG) RH rear C417-1 GD149 (BK/GY)
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
For a front turn lamp, INSTALL a new bulb holder. CLEAR the DTCs. REPEAT the self-test.
For a rear turn lamp, REPAIR or INSTALL a new rear lamp jumper harness. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR the ground circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.
P8 CHECK FOR VOLTAGE TO THE TURN LAMP (OPEN DTC NOT PRESENT)
- Ignition OFF.
- Disconnect: Inoperative Turn Lamp.
- Ignition ON.
- Turn the hazard lamps on.
- Measure the voltage between the inoperative turn lamp, harness side and ground as follows:
Inoperative Turn Lamp Connector-Pin Circuit LH front C1023-3CLS21 (BU/GN) RH front C1043-3CLS25 (YE/VT) LH rear C414-6CLS20 (BN/BU) RH rear C417-6CLS24 (BN/WH) LH rear C414-5CLS23 (GY/OG) RH rear C417-5CLS27 (GN/OG)
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
For a front turn lamp, INSTALL a new bulb holder. TEST the system for normal operation.
For a rear turn lamp, REPAIR or INSTALL a new rear lamp jumper harness for a short to ground. TEST the system for normal operation.
No
GO to P9.
P9 REPEAT THE SELF-TEST AND RECHECK FOR VOLTAGE TO THE TURN LAMP
- Turn the hazard lamps off.
- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) Self-Test.
- Clear the DTCs and repeat the self-test (required to enable the turn lamp output driver if DTC B106E is present).
- Turn the hazard lamps on.
- Measure the voltage between the inoperative turn lamp, harness side and ground as follows:
Inoperative Turn Lamp Connector-Pin Circuit LH front C1023-3CLS21 (BU/GN) RH front C1043-3CLS25 (YE/VT) LH rear C414-6CLS20 (BN/BU) RH rear C417-6CLS24 (BN/WH) LH rear C414-5CLS23 (GY/OG) RH rear C417-5CLS27 (GN/OG)
Does the voltage alternate from 0 volts to greater than 10 volts?
Yes
For a front turn lamp, INSTALL a new bulb holder. TEST the system for normal operation.
For a rear turn lamp, REPAIR or INSTALL a new rear lamp jumper harness for a short to ground. TEST the system for normal operation.
No
GO to P10.
P10 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND
- Turn the hazard lamps off.
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280F (Front Turn Lamp).
- Disconnect: SJB (Smart Junction Box) C2280C and C2280D (Rear Turn Lamp).
- Measure the resistance between the inoperative turn lamp, harness side and ground as follows:
Inoperative Turn Lamp Connector-Pin Circuit LH front C1023-3CLS21 (BU/GN) RH front C1043-3CLS25 (YE/VT) LH rear C414-6CLS20 (BN/BU) RH rear C417-6CLS24 (BN/WH) LH rear C414-5CLS23 (GY/OG) RH rear C417-5CLS27 (GN/OG)
Is the resistance greater than 10,000 ohms?
Yes
GO to P11.
No
REPAIR the circuit in question for a short to ground. After the repair:
If no DTCs were present, TEST the system for normal operation.
If DTC B106E was 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 was present, INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.
P11 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- 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. CLEAR the DTCs. REPEAT the self-test.