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EXL-48 < COMPONENT DIAGNOSIS > TURN SIGNAL LAMP CIRCUIT TURN SIGNAL LAMP CIRCUIT Description INFOID:0000000004216400 The BCM monitors inputs from the combination switch to determine when to activate the turn signals. The BCM outputs voltage direction to the left and right turn signals during turn signal operation or both during haz- ard warning operation. The BCM sends a turn signal indicator request to the combination meter via the CAN communication lines. The BCM performs the fast flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is open. NOTE: Turn signal lamp blinks at normal speed when using the hazard warning lamp. Component Function Check INFOID:0000000004216401 1. CHECK TURN SIGNAL LAMP CONSULT-III 1. Select "FLASHER" of BCM (FLASHER) active test item. 2. With operating the test items, check that the turn signal lamp blinks. Does the turn signal lamp blink? YES >> Turn signal lamp circuit is normal. NO >> Refer to . Diagnosis Procedure INFOID:0000000004216402 1. CHECK TURN SIGNAL LAMP BULB Check the applicable lamp bulb to be sure the proper bulb standard is in use and the bulb is not open. YES >> GO TO 2 NO >> Replace the bulb. 2. CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE 1. Turn the ignition switch OFF. 2. Disconnect the front combination lamp connector or the rear combination lamp connector. 3. Turn the ignition switch ON. 4. With operating the turn signal switch, check the voltage between the BCM harness connector and the ground. LH : Turn signal lamp LH blinking RH : Turn signal lamp RH blinking OFF : The turn signal lamp OFF Terminals Test item Voltage (+) ( −) BCM Ground FLASHER Connector Terminal RH M17 17 LH or RH LH M17 18 OFF 0V AWLIA0821ZZ PKID0926E |