TL V6-3.2L (2004)
Body Control Systems: Symptom Related Diagnostic Procedures
Troubleshooting - B-CAN System Diagnosis Test Mode 1
Troubleshooting - B-CAN System Diagnosis Test Mode 1
Perform this diagnosis if the HDS is not available.
1. Check the No. 7 (7.5 A) fuse and No.21 (7.5 A) fuse in the under-dash fuse/relay box.
Are the fuses OK?
YES - Go to step 2.
NO - Find and repair the cause of the blown fuse.
2. Remove the left kick panel.
3. Turn the ignition switch ON (II), and move the interior light switch in middle position.
4. Connect the MPCS service connector (A) to the MCIC socket (B) in the under-dash fuse/relay box.
5. Wait 5 seconds, and watch the map lights. When the system enters Mode 1, the front and rear map lights will flash quickly once, and a double
beep will be heard.
6. If there is a DTC, the map lights and ignition key light will blink, pause, then repeat the DTC as long as the ignition switch ON (II).
Is there a repeating DTC?
YES - Count the blinks, then go to step 7.
NO - Go to step 8.
7. About 1 second after you go into self-diagnosis Mode 1, the map lights will indicate the DTC, and repeat it every 3 seconds. If there is more than
one DTC, the system will indicate them in ascending order, beginning from the DTC with the lowest numerical value. Troubleshoot the DTCs as
indicated below:
-
DTC 2, 3, 4 and 5 simultaneously: Check for an open in the BLU wire between multiplex integrated control unit D11 and relay control module
17, BRN/BLK wire between multiplex integrated control unit J4 and door multiplex control unit A5, LT GRN wire between multiplex
integrated control Unit X27 and combination switch control unit No.4, BRN/YEL between multiplex integrated control unit N28 and gauge
