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B3868



DTC B3868 or B3869 (EXPORT ONLY)

DIAGNOSTIC INSTRUCTIONS
- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Strategy Based Diagnosis
- Diagnostic Procedure Instructions Initial Inspection and Diagnostic Overview

DTC DESCRIPTOR
- DTC 3868 00 Left Side Repeater Control Circuit
- DTC 3869 00 Right Side Repeater Control Circuit




DIAGNOSTIC FAULT INFORMATION

CIRCUIT/SYSTEM DESCRIPTION
The BCM supplies a voltage to the left rear and right rear side repeater lamps supply voltage circuit.

CONDITIONS FOR RUNNING THE DTC
- The ignition is ON.
- The left or right rear turn signal and right or left side repeater lamps must be commanded on.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to ground in the Left or Right Rear turn Signal supply voltage circuit.

ACTION TAKEN WHEN THE DTC SETS
The right or left rear turn signal lamps are always on or do not illuminate.

CONDITIONS FOR CLEARING THE DTC
- The conditions for setting the DTC are no longer present.
- A history DTC clears after 100 malfunction-free ignition cycles.
- The BCM receives the clear code command from the scan tool.

DIAGNOSTIC AIDS
An open/high resistance or a short to ground in the turn signal switch would cause the turn signal and side repeater lamps to become inoperative.

CIRCUIT/SYSTEM VERIFICATION
Ignition ON, observe right or left rear turn signal and right or left side repeater lamps while engaging the turn signal switch in the appropriate position. Selecting the left or right side repeater lamps should illuminate the selected lamps.

CIRCUIT/SYSTEM TESTING

Turn Signal Multifunction Switch Circuit Testing
1. Ignition OFF, disconnect the harness connector at the turn signal multifunction switch terminals C2 pin G and H.
2. Ignition ON, install a test lamp between the turn signal voltage supply circuit terminal and ground. The test lamp should flash ON and OFF.
- If the test lamp does not flash, test the voltage supply circuit for a short to ground or an open/high resistance.
3. Install a 3-amp fused jumper wire between the voltage supply circuit and the turn signal circuit. Verify that the proper turn signal and side repeater lamps are ON.
- If the turn signals are not ON, test the appropriate signal circuit of the turn signal switch for a short to voltage, short to ground or an open/high resistance.
4. If all circuits test normal, test or replace the turn signal multifunction switch.

Park/Turn Signal/Turn Signal Indicator Circuit Testing
1. Ignition OFF, remove the inoperative light bulb.
2. Test for less than 1 ohm of resistance between the ground circuit and ground.
- If greater than 1 ohm, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit and the ground circuit.
4. Ignition ON, turn ON the appropriate turn signal, the test lamp should flash.
- If the test lamp remains ON all the time, test for a short to voltage on the control circuit. If the circuit tests normal, replace the BCM
- If the test lamp remains OFF all the time, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, test or replace the turn signal multifunction switch.
5. If all circuits test normal, test or replace the light bulb.

BCM Circuit Testing
1. Ignition OFF, disconnect the harness connector at the BCM, left and right rear turn signal supply voltage terminals C5 pins 1 and 2 for the rear turn signals. Disconnect the harness connector of the left and right front turn signal supply voltage terminals C5 pins 5 and 4 for the front turn signals.
2. Test for less than 1 ohm of resistance between the supply voltage circuit and ground.
- If greater than 1 ohm, test the supply voltage circuit for an open/high resistance.
3. Connect a test lamp between the control circuit and the ground circuit.
4. Ignition ON, turn ON the appropriate turn signal. The test lamp should flash.
- If the test lamp remains ON all the time, test for a short to voltage on the control circuit. If the circuit tests normal, replace the BCM.
- If the test lamp remains OFF all the time, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, test or replace the turn signal multifunction switch.
5. If all circuits test normal, replace the BCM.

COMPONENT TESTING

Turn Signal Switch Testing
1. Ignition OFF, disconnect the harness connector at the turn signal multifunction switch terminals C2 pins G and H.
2. Test for infinite resistance between the signal terminals and the voltage supply terminal with the switch in the open position.
- If less than infinite resistance, replace the turn signal multifunction switch.
3. Test for less than 1.5 ohms between the signal terminals and the voltage supply terminal with the switch in the closed position.
- If greater than 1.5 ohms, replace the turn signal multifunction switch.

Park/Turn Signal/(Side Repeater export) Turn Signal Indicator Bulb Testing
1. Ignition OFF, remove the appropriate light bulb.
2. Test for less than 4.5 ohms between the two terminals on the light bulb.
- If greater than 4.5 ohms, replace the light bulb.

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Control Module References for BCM replacement, setup, and programming. Programming and Relearning
- Left or Right Side Repeater Bulb
- Park/Turn Signal Lamp Bulb Replacement (Equinox Park Lamp) Park/Turn Signal Lamp Bulb Replacement (Equinox Turn Lamp) Park/Turn Signal Lamp Bulb Replacement (Torrent Turn Lamp)
- Turn Signal Multifunction Switch Replacement Verification Tests
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