B1206
NETWORKING: LIN COMMUNICATION SYSTEM: B1206: P/W Master Switch Communication Stop
DTC B1206 - P/W Master Switch Communication Stop
DESCRIPTION
This DTC is stored when LIN communication between the master switch and main body ECU (cowl side junction block LH) stops for 10 seconds or more.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTE:
When using the Techstream with the engine switch off to troubleshoot:
Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
HINT: DTC B2325 is stored when the communication between the master switch and main body ECU (cowl side junction block LH) stops.
PROCEDURE
1. CLEAR DTC
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
2. CHECK FOR DTC
(a) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- USE SIMULATION METHOD TO CHECK
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)
(a) Disconnect the E3 ECU connector.
(b) Disconnect the I11 switch connector.
(c) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK MASTER SWITCH ASSEMBLY (BATTERY VOLTAGE AND BODY GROUND)
(a) Disconnect the I11 switch connector.
(b) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. REPLACE MASTER SWITCH ASSEMBLY
(a) Temporarily replace the master switch assembly with a new or normally functioning one Removal.
(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
6. CHECK FOR DTC
(a) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
A -- END (MASTER SWITCH IS DEFECTIVE)