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DTC (MICU)
NOTE : If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks.
1. Exterior lights system check 1:
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Is either information indicator ON?
YES
Go to step 4.
NO
Go to step 2.
2. Exterior lights system check 2:
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Are both information indicators ON?
YES
Go to step 3.
NO
Intermittent failure, the system is OK at this time.
3. Shorted wire check (H/L HI SW to PASSING SW line):
Combination light switch 12P connector
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Are both information indicators ON?
YES
Repair a short between the wires.
NO
The H/L HI SW to PASSING SW wire is OK. Replace the combination light switch.
4. Determine possible failure area (combination light switch, others):
Combination light switch 12P connector
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Is either information indicator ON?
YES
Go to step 5.
NO
Replace the combination light switch.
5. Shorted wire check (PASSING SW, H/L HI SW lines):
Under-dash fuse/relay box connector B (20P)
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Are there continuity?
YES
Repair a short to ground in the wire.
NO
The PASSING SW and H/L HI SW wires are OK. Faulty MICU; replace the under-dash fuse/relay box .
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DTC Troubleshooting 86-12, 86-13, 86-14, 86-16, 86-19, 86-21, 86-22: F-CAN
Communication Malfunction