Description
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 hazard 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
1.CHECK TURN SIGNAL LAMP
CONSULT
LH : Turn signal lamp LH blinking
RH : Turn signal lamp RH blinking
OFF : The turn signal lamp OFF
Diagnosis Procedure
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.
2.CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE
3.CHECK TURN SIGNAL LAMP CIRCUIT FOR OPEN
4.CHECK TURN SIGNAL LAMP SHORT CIRCUIT
Check continuity between the BCM harness connector and ground.
5.CHECK TURN SIGNAL LAMP GROUND CIRCUIT
Power supply and ground circuit
COMBINATION METER
COMBINATION METER : Diagnosis Procedure
Regarding Wiring Diagram information, refer to MWI-87, "Wiring Diagram".
1.CHECK FUSES
Check for blown combination meter fuses.
2.POWER SUPPLY CIRCUIT CHECK
Disconnect combination meter connector.
Check voltage between combinatio ...
Symptom diagnosis
SYSTEM SYMPTOM
Symptom Table
The diagnostics item numbers show the sequence for
inspection. Inspect in order from item 1.
...
AMP on signal circuit
Description
When the audio system is turned on, a voltage signal is supplied from the AV
control unit to the BOSE speaker
amp. When this signal is received, the BOSE speaker amp. will turn on.
Diagnosis Procedure
1.CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)
Turn audio system ON.
Check v ...