TL V6-3.2L (2004)
B11. If the wire is OK, substitute a known-good under-dash fuse/relay box (multiplex integrated control unit), under-hood fuse/relay box
power window master switch, wiper/washer switch and gauge one at a time, in that order, and check for the DTCs after each substitution.
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DTC 1 only:Go to MICU input test.
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DTC 2 only (no other DTCs present, Go to the relay control module input test. If all inputs are OK, substitute a known-good relay control
module and then a MICU, one at a time, and then check for DTCs. If a DTC recurs after a substitution, replace that unit.
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DTC 3 only (no other DTC present): Go to the door multiplex control unit input test. If all inputs are OK, substitute a known-good door
multiplex control unit and then a MICU, one at a time and then check for DTCs. If a DTC recurs after a substitution, replace that unit.
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DTC 4 only (no other DTCs present) Go to the combination switch control unit input test. If all inputs are OK, substitute a washer switch and
then a MICU, one at a time, and then check for DTCs. If a DTC recurs after a substitution, replace that unit,
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DTC 5 only (no other DTCs present): Go to the gauge control module input test. If all inputs are OK, substitute a known-good gauge control
module and then a MICU, one at a time, and then check for DTCs. If a DTC recurs after substitution, replace that unit.
8. Check for B-CAN DTCs indicated by the gauge control module while still in Test Mode 1.
Are any DTCs indicated?
YES - Go to step 9.
NO - Go to step 11.
9. Record all DTCs and sort them by type using the DTC Troubleshooting Index.
10. Troubleshoot the DTCs in these order:
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Battery voltage DTCs
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Internal error DTCs
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Loss of communication DTCs (begin with the lowest number first; for example, if B1006 and B1059 are retrieved, troubleshoot B1006 first)
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Signal error DTCs
Test Mode 2:
11. Remove the MPCS service connector from the under-dash fuse/relay box socket for 5 - 10 seconds, then re-insert it to enter Mode 2. When the
system enters Mode 2, the front and rear map lights will flash two times quickly.
NOTE: If the MPCS connector is disconnected for too short or too long of a time, or the ignition switch is turned OFF, the system will return to
Test Mode 1.
MICU
