Pinpoint Test M: One Turn Signal/Hazard Lamp Is Inoperative/Always On (4-Door)
Turn Signal and Hazard Lamps
Pinpoint Test M: One Turn Signal/Hazard Lamp Is Inoperative/Always On (4-Door)
Refer to Wiring Diagram Set 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information Electrical Diagrams.
Normal Operation
When the Body Control Module (BCM) detects the multifunction switch is in the LH TURN position, the BCM (Body Control Module) provides ground for the LH turn relay coil to interrupt the stoplamp switch output to the LH rear lamp, and simultaneously provides on/off voltage to the LH front turn lamp on one output circuit, and to the LH turn relay (switch side) and LH exterior mirror turn lamp (if equipped) on another circuit.
When the Body Control Module (BCM) detects the multifunction switch is in the RH TURN position, the BCM (Body Control Module) provides ground for the RH turn relay coil to interrupt the stoplamp switch output to the RH rear lamp, and simultaneously provides on/off voltage to the RH front turn lamp on one output circuit, and to the RH turn relay (switch side) and RH exterior mirror turn lamp (if equipped) on another circuit.
The rear lamps are combination stop/turn lamps and are controlled through the rear stoplamp circuitry.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Bulb socket
- Turn relay
- BCM (Body Control Module)
PINPOINT TEST M : ONE TURN SIGNAL/HAZARD LAMP IS INOPERATIVE/ALWAYS ON (4-DOOR)
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
M1 CHECK THE STOPLAMPS
- Ignition OFF.
- Apply and release the brake pedal while observing the stoplamps.
Do the stoplamps operate correctly?
Yes
GO to M2.
No
REFER to Stoplamps Testing and Inspection.
M2 DETERMINE IF A TURN LAMP IS ALWAYS ON
NOTE: If the turn lamps are flashing, GO to Pinpoint Test L Pinpoint Test L: The Turn Signal Function Is Always On.
- Ignition ON.
- Activate the hazard lamp function and monitor the turn lamps.
Is any turn lamp on?
Yes
GO to M3.
No
For a front turn lamp, GO to M4.
For a rear or exterior mirror turn lamp, GO to M9.
M3 CHECK THE BCM (Body Control Module) TURN LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
- Deactivate the hazard lamp function.
- Ignition OFF.
- Disconnect: BCM (Body Control Module) C2280A (Front Turn Lamp).
- Disconnect: BCM (Body Control Module) C2280C (Rear or Exterior Mirror Turn Lamp).
- Ignition ON.
- Activate the hazard lamp function.
Does the turn lamp in question continue to illuminate?
Yes
For the LH front turn lamp, REPAIR circuit CLS21 (BU/GN) for a short to voltage. CLEAR the DTCs. TEST the system for normal operation.
For the RH front turn lamp, REPAIR circuit CLS25 (YE/VT) for a short to voltage. CLEAR the DTCs. TEST the system for normal operation.
For the LH rear or exterior mirror turn lamp, REPAIR circuit CLS23 (GY/OG) for a short to voltage. CLEAR the DTCs. TEST the system for normal operation.
For the RH rear or exterior mirror turn lamp, REPAIR circuit CLS27 (GN/OG) for a short to voltage. CLEAR the DTCs. TEST the system for normal operation.
No
GO to M19.
M4 CHECK FOR VOLTAGE TO THE FRONT TURN LAMP
- Ignition OFF.
- Disconnect: Inoperative Front Lamp.
- Activate the hazard lamp function.
- Measure the voltage between the LH front turn lamp C1023-3, circuit CLS21 (BU/GN), harness side and ground; or between the RH front turn lamp C1043-3, circuit CLS25 (YE/VT), harness side and ground.
Does the voltage alternate between 0 volts and greater than 10 volts?
Yes
GO to M5.
No
GO to M6.
M5 CHECK THE FRONT TURN LAMP GROUND CIRCUIT FOR AN OPEN
- Measure the voltage between the LH front turn lamp C1023-3, circuit CLS21 (BU/GN), harness side and the LH front lamp C1023-1, circuit GD124 (BK/VT) (automatic transmission) or GD188 (BK/YE) (manual transmission), harness side; or between the RH front turn lamp C1043-3, circuit CLS25 (YE/VT), harness side and the RH front lamp C1043-1, circuit GD123 (BK/GY), harness side.
Does the voltage alternate between 0 volts and greater than 10 volts?
Yes
INSTALL a new bulb socket. CLEAR the DTCs. TEST the system for normal operation.
No
REPAIR the ground circuit in question for an open. CLEAR the DTCs. TEST the system for normal operation.
M6 CHECK THE FRONT TURN LAMP BULB SOCKET FOR A SHORT TO GROUND
- Deactivate the hazard lamp function.
- Cycle the ignition on then off.
- Activate the hazard lamp function.
- Measure the voltage between the LH front turn lamp C1023-3, circuit CLS21 (BU/GN), harness side and ground; or between the RH front turn lamp C1043-3, circuit CLS25 (YE/VT), harness side and ground.
Does the voltage alternate between 0 volts and greater than 10 volts?
Yes
INSTALL a new bulb socket. CLEAR the DTCs. TEST the system for normal operation.
No
GO to M7.
M7 CHECK THE FRONT TURN LAMP VOLTAGE CIRCUIT FOR A SHORT TO GROUND
- Deactivate the hazard lamp function.
- Disconnect: BCM (Body Control Module) C2280A.
- Measure the resistance between the LH front turn lamp C1023-3, circuit CLS21 (BU/GN), harness side and ground; or between the RH front turn lamp C1043-3, circuit CLS25 (YE/VT), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to M8.
No
REPAIR circuit CLS21 (BU/GN) (LH turn) or CLS25 (YE/VT) (RH turn) for a short to ground. CLEAR the DTCs. CYCLE the ignition. TEST the system for normal operation.
M8 CHECK THE FRONT TURN LAMP VOLTAGE CIRCUIT FOR AN OPEN
- Measure the resistance between the LH front turn lamp C1023-3, circuit CLS21 (BU/GN), harness side and the BCM (Body Control Module) C2280A-5, circuit CLS21 (BU/GN), harness side; or between the RH front turn lamp C1043-3, circuit CLS25 (YE/VT), harness side and the BCM (Body Control Module) C2280A-6, circuit CLS25 (YE/VT), harness side.
Is the resistance less than 5 ohms?
Yes
GO to M19.
No
REPAIR circuit CLS21 (BU/GN) (LH turn) or CLS25 (YE/VT) (RH turn) for an open. CLEAR the DTCs. TEST the system for normal operation.
M9 USE THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST
- Deactivate the hazard lamp function.
- Check the recorded results from the BCM (Body Control Module) on-demand self-test.
Is DTC B1D06:11 or DTC B1D07:11 present?
Yes
If equipped with exterior mirror turn lamps, GO to M10.
If not equipped with exterior mirror turn lamps, GO to M11.
No
GO to M12.
M10 CHECK THE EXTERIOR MIRROR FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: LH Exterior Mirror C521 (DTC B1D06:11).
- Disconnect: RH Exterior Mirror C601 (DTC B1D07:11).
- Cycle the ignition on and then off.
- Activate the hazard lamp function.
Does the rear lamp flash on and off?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
GO to M11.
M11 CHECK THE BCM (Body Control Module) REAR TURN LAMP OUTPUT CIRCUIT FOR A SHORT TO GROUND
- Deactivate the hazard lamp function.
- Disconnect: Corresponding LH or RH Turn Relay.
- Disconnect: BCM (Body Control Module) C2280C.
- Measure the resistance between the BCM (Body Control Module) C2280C-12 (DTC B1D06:11), circuit CLS23 (GY/OG), harness side and ground; or between the BCM (Body Control Module) C2280C-13 (DTC B1D07:11), circuit CLS27 (GN/OG), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to M19.
No
REPAIR circuit CLS23 (GY/OG) (LH turn) or circuit CLS27 (GN/OG) (RH turn) for a short to ground. CLEAR the DTCs. CYCLE the ignition. TEST the system for normal operation.
M12 CHECK FOR VOLTAGE TO THE TURN RELAY OR EXTERIOR MIRROR
NOTE: If both the rear turn and exterior mirror turn lamps are inoperative, follow the diagnostics for the rear turn lamp.
- Ignition OFF.
- Disconnect: Suspect Turn Relay or Exterior Mirror.
- Activate the hazard lamp function.
- For an inoperative rear turn lamp, measure the voltage between the LH turn relay pin 5, CJB (Central Junction Box) face side, circuit CLS23 (GY/OG), harness side and ground; or between the RH turn relay pin 5, CJB (Central Junction Box) face side, circuit CLS27 (GN/OG), harness side and ground.
- For an inoperative exterior mirror turn lamp, measure the voltage between the LH exterior mirror, C521-8, circuit CLS23 (GY/OG), harness side and ground; or between the RH exterior mirror, C601-8, circuit CLS27 (GN/OG), harness side and ground.
Does the voltage alternate between 0 volts and greater than 10 volts?
Yes
For an inoperative exterior mirror turn lamp, GO to M13.
For an inoperative rear turn lamp, GO to M15.
No
For an inoperative exterior mirror turn lamp, REPAIR circuit CLS23 (GY/OG) (LH turn) or circuit CLS27 (GN/OG) (RH turn) for an open. TEST the system for normal operation.
For an inoperative rear turn lamp, GO to M14.
M13 CHECK THE EXTERIOR MIRROR GROUND CIRCUIT FOR AN OPEN
- Measure the voltage between the LH exterior mirror C521-8, circuit CLS23 (GY/OG), harness side and the LH exterior mirror C521-2, circuit GD143 (BK/VT), harness side; or between RH exterior mirror, C601-8, circuit CLS27 (GN/OG), harness side and the RH exterior mirror C601-2, circuit GD145 (BK/BU), harness side.
Does the voltage alternate between 0 volts and greater than 10 volts?
Yes
INSTALL a new exterior mirror. TEST the system for normal operation.
No
REPAIR the circuit GD143 (BK/VT) (LH turn) or circuit GD145 (BK/BU) (RH turn) for an open. TEST the system for normal operation.
M14 CHECK THE BCM (Body Control Module) REAR TURN LAMP OUTPUT CIRCUIT FOR AN OPEN
- Deactivate the hazard lamp function.
- Disconnect: BCM (Body Control Module) C2280C.
- For an inoperative LH rear turn lamp, measure the resistance between the LH turn relay pin 5, circuit CLS23 (GY/OG), CJB (Central Junction Box) face side and the BCM (Body Control Module) C2280C-12, circuit CLS23 (GY/OG), harness side.
- For an inoperative RH rear turn lamp, measure the resistance between the RH turn relay pin 5, circuit CLS27 (GN/OG), CJB (Central Junction Box) face side and the BCM (Body Control Module) C2280C-13, circuit CLS27 (GN/OG), harness side.
Is the resistance less than 5 ohms?
Yes
GO to M19.
No
REPAIR circuit CLS23 (GY/OG) (LH turn) or circuit CLS27 (GN/OG) (RH turn) for an open. CLEAR the DTCs. TEST the system for normal operation.
M15 CHECK THE TURN RELAY
- Deactivate the hazard lamp function.
- Substitute a known good relay.
- Activate the hazard lamp function.
Does the suspect rear turn lamp flash on and off?
Yes
REMOVE the known good relay. INSTALL a new turn relay. TEST the system for normal operation.
No
REMOVE the known good relay. GO to M16.
M16 CHECK THE FOR VOLTAGE TO THE TURN RELAY
- Deactivate the hazard lamp function.
- Measure the voltage between the LH turn relay pin 1, circuit SBP18 (YE/RD), CJB (Central Junction Box) face side and ground; or between the RH turn relay pin 1, circuit SBP18 (YE/RD), CJB (Central Junction Box) face side and ground.
Is the voltage greater than 10 volts?
Yes
GO to M17.
No
REPAIR circuit SBP18 (YE/RD) for an open. TEST the system for normal operation
M17 CHECK THE TURN RELAY GROUND CONTROLLED CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect: BCM (Body Control Module) C2280D.
- Ignition ON.
- Measure the voltage between the LH turn relay pin 2, circuit CLS51 (WH/GN), CJB (Central Junction Box) face side and ground; or between the RH turn relay pin 2, circuit CLS53 (GY/VT), CJB (Central Junction Box) face side and ground.
Is any voltage present?
Yes
REPAIR circuit CLS51 (WH/GN) (LH turn) or circuit CLS53 (GY/VT) (RH turn) for a short to voltage. CLEAR the DTCs. CYCLE the ignition. TEST the system for normal operation.
No
GO to M18.
M18 CHECK THE TURN RELAY GROUND CONTROLLED CIRCUIT FOR AN OPEN
- Ignition OFF.
- Connect: Suspect Turn Relay.
- Measure the voltage between the BCM (Body Control Module) C2280D-6 (LH turn), circuit CLS51 (WH/GN), harness side and ground; or between the BCM (Body Control Module) C2280D-7 (RH turn), circuit CLS53 (GY/VT), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to M19.
No
REPAIR circuit CLS51 (WH/GN) (LH turn) or circuit CLS53 (GY/VT) (RH turn) for an open. CLEAR the DTCs. TEST the system for normal operation.
M19 CHECK FOR CORRECT BCM (Body Control Module) OPERATION
- Disconnect all the BCM (Body Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM (Body Control Module) 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 BCM (Body Control Module). 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.