B1214

NETWORKING: MULTIPLEX COMMUNICATION SYSTEM: B1214, B1215: Short to B+ in Door System Communication Bus Malfunction
B1215 - Short to GND in Door System Communication Bus Malfunction

DESCRIPTION

* If a +B short circuit or body ground short circuit is detected on the door system communication bus (BEAN), BEAN is disabled and a DTC is stored.

HINT
*1: w/ Sliding Roof

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC (MAIN BODY ECU RH)

(a) Disconnect the J75 and RJ connectors.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK FOR DTC (FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2))
OK -- Continue to next step.

2. CHECK FOR DTC (MULTIPLEX TILT AND TELESCOPIC ECU)

(a) Reconnect the J75 and RJ connectors.

(b) Disconnect the J28 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - MAIN BODY ECU RH)

OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Removal

3. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - MAIN BODY ECU RH)

(a) Reconnect the J28 connector.

(b) Disconnect the RA connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - MAIN BODY ECU RH)

4. CHECK FOR DTC (FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2))

(a) Reconnect the J75 and RJ connectors.

(b) Disconnect the 2F connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS, CONNECTOR AND EACH ECU

OK -- REPLACE FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2)

5. CHECK HARNESS, CONNECTOR AND EACH ECU

(a) Disconnect the RJ connector.

(b) Turn the engine switch on (IG).

(c) Clear the DTC.

(d) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS, CONNECTOR AND EACH ECU
OK -- Continue to next step.

6. CHECK FOR DTC (MULTIPLEX NETWORK MASTER SWITCH)

(a) Reconnect the RJ and 2F connectors.

(b) Disconnect the M18 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS, CONNECTOR AND EACH ECU

OK -- REPLACE MULTIPLEX NETWORK MASTER SWITCH Removal

7. CHECK HARNESS, CONNECTOR AND EACH ECU

(a) Disconnect the 2F connector.

(b) Turn the engine switch on (IG).

(c) Clear the DTC.

(d) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK FOR DTC (FRONT POWER SEAT SWITCH RH (POSITION CONTROL ECU))
OK -- Continue to next step.

8. CHECK FOR DTC (MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH))

(a) Reconnect the M18 and 2F connectors.

(b) Disconnect the A30 and Q3 connectors.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - MAIN BODY ECU LH)

OK -- REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

9. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - MAIN BODY ECU LH)

(a) Disconnect the M18 connector.

(b) Turn the engine switch on (IG).

(c) Clear the DTC.

(d) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - MAIN BODY ECU LH)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU LH - FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2))

10. CHECK FOR DTC (FRONT POWER SEAT SWITCH RH (POSITION CONTROL ECU))

(a) Reconnect the M18 and 2F connectors.

(b) Disconnect the T7 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK FOR DTC (OUTER MIRROR CONTROL ECU RH)

OK -- REPLACE FRONT POWER SEAT SWITCH RH (POSITION CONTROL ECU RH) Removal

11. CHECK FOR DTC (OUTER MIRROR CONTROL ECU RH)

(a) Disconnect the L10 connector.

(b) Turn the engine switch on (IG).

(c) Clear the DTC.

(d) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - CERTIFICATION ECU)

OK -- REPLACE OUTER MIRROR CONTROL ECU RH Removal

12. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - CERTIFICATION ECU)

(a) Disconnect the M18 and P33 connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - CERTIFICATION ECU)
OK -- Continue to next step.

13. CHECK HARNESS AND CONNECTOR

(a) Reconnect the M18 connector.

(b) Disconnect the RJ connector.

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

14. CHECK HARNESS, CONNECTOR AND EACH ECU

(a) Reconnect the RJ and 2F connectors.

(b) Disconnect the R5 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

(f) Proceed to next step based on the inspection result.

Result:

B -- CHECK FOR DTC (RAIN SENSOR)

C -- CHECK FOR DTC (FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU))
A -- Continue to next step.

15. CHECK FOR DTC (SLIDING ROOF CONTROL ECU)

(a) Reconnect the R5 connector.

(b) Disconnect the R6 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - OVERHEAD JUNCTION BLOCK)

OK -- REPLACE SLIDING ROOF CONTROL ECU Disassembly

16. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - OVERHEAD JUNCTION BLOCK)

(a) Disconnect the R5 connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SLIDING ROOF ECU - OVER HEAD JUNCTION BLOCK)
OK -- Continue to next step.

17. CHECK FOR DTC (RAIN SENSOR)

(a) Reconnect the R5 and R6*1 connectors.

(b) Disconnect the R7 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

HINT
*1: w/ Sliding Roof

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK)

OK -- REPLACE RAIN SENSOR Removal

18. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK)

(a) Disconnect the R5 connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPLACE OVERHEAD JUNCTION BLOCK

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK)

19. CHECK FOR DTC (FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU))

(a) Reconnect the R5 connector.

(b) Disconnect the U7 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK FOR DTC (OUTER MIRROR CONTROL ECU LH)

OK -- REPLACE FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU) Removal

20. CHECK FOR DTC (OUTER MIRROR CONTROL ECU LH)

(a) Reconnect the U7 connector.

(b) Disconnect the M10 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK FOR DTC (WINDSHIELD WIPER SWITCH ASSEMBLY)

OK -- REPLACE OUTER MIRROR CONTROL ECU LH Removal

21. CHECK FOR DTC (WINDSHIELD WIPER SWITCH ASSEMBLY)

(a) Reconnect the M10 connector.

(b) Disconnect the J26 connector.

(c) Turn the engine switch on (IG).

(d) Clear the DTC.

(e) Check for DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2))

OK -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Removal

22. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2))

(a) Reconnect the J26 connector.

(b) Disconnect the J55 and 2F connectors.

(c) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2))
OK -- Continue to next step.

23. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - POWER SOURCE CONTROL ECU)

(a) Reconnect the 2F connector.

(b) Disconnect the J26 connector.

(c) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (WINDSHIELD WIPER SWITCH - POWER SOURCE CONTROL ECU)
OK -- Continue to next step.

24. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - GATEWAY ECU)

(a) Reconnect the J55 connector.

(b) Disconnect the J76 connector.

(c) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (WINDSHIELD WIPER SWITCH - GATEWAY ECU)
OK -- Continue to next step.

25. CHECK HARNESS AND CONNECTOR (GATEWAY ECU-MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH))

(a) Reconnect the J26 connector.

(b) Disconnect the J75 connector.

(c) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GATEWAY ECU - MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH))
OK -- Continue to next step.

26. REPLACE GATEWAY ECU

(a) Reconnect the J75 connector.

(b) Replace the Gateway ECU with a normally functioning ECU.

(c) Clear the DTC.

(d) Check the DTCs.

OK:

DTCs B1214 and B1215 are not output.

NG -- REPLACE POWER SOURCE CONTROL ECU

OK -- END (GATEWAY ECU WAS DEFECTIVE)