Multiplex Communication System Diagnostic Trouble Code Chart
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in DTC CHART . Proceed to the procedure for that circuit.
NOTE:
DTC 21, 22, and 41 don't mean switch abnormal but notify how switch works.
If DTC is not output when operating switch, it means failure of switch contact.
If DTC is output when not opening switch, it means stick of switch.
DTC CHART
| DTC | Trouble Area |
| B1211/11 | Wire harness, Driver Door ECU |
| B1221/21 | Power Window Master Switch, Wire harness |
| B1222/22 | Door Lock Control Switch, Door Key Lock & Unlock Switch, Wire Harness |
| B1241/41 | Stop Light Switch, Wire Harness |
| B1242/42 | Wire Harness, Wireless Door Lock Tuner |
| B1248/48 | Wire Harness, Gateway ECU |
| B1261/61 | Wire Harness, ECM |
| B1262/62 | Wire Harness, A/C amplifier |
| B1266/66 | Wire Harness, ECU (Instrument Panel System) |
| B1267/67 | Wire Harness, ECU (Instrument Panel System) |
| B1271/71 | Wire Harness, Combination Meter ECU |
| B1274/74 | Wire Harness, Multi Display |
| B1293/93 | Wire Harness, Power Source Circuit, Gateway ECU |
| POWER SOURCE CIRCUIT | Wire Harness, Power Source Circuit, Gateway ECU |