B2325
NETWORKING: LIN COMMUNICATION SYSTEM: B2325: LIN Communication Bus Malfunction
B2325 - LIN Communication Bus Malfunction
DESCRIPTION
The main body ECU monitors LIN communication errors in the door bus. The interruption of communication for 2.6 seconds is 1 error, and when 3 consecutive errors are detected (7.8 seconds), then this DTC is stored.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* When using the Techstream, repeatedly turn either front door courtesy light switch off-and-on at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins.
* When the main body ECU has been replaced with a new part, or when the battery negative terminal is reconnected, the ignition switch condition will be ON. Also, after the battery is disconnected and reconnected, the LIN communication system condition is the same as it was before the battery was disconnected.
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - REGULATOR LH)
(a) Disconnect the F1 power window regulator master switch assembly connector.
(b) Disconnect the F4 front door window regulator sub-assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(d) Reconnect the power window regulator master switch assembly connector.
(e) Reconnect the front door window regulator sub-assembly LH connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B - EACH ECU)
(a) Disconnect the 3C instrument panel junction block assembly connector.
(b) Disconnect the F1 power window regulator master switch assembly connector.
(c) Disconnect the E4 front door window regulator sub-assembly RH connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(e) Reconnect the instrument panel junction block assembly connector.
(f) Reconnect the power window regulator master switch assembly connector.
(g) Reconnect the front door window regulator sub-assembly RH connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK FOR DTC
(a) Disconnect the F1 power window regulator master switch assembly connector.
(b) Connect the 3C instrument panel junction block assembly, E4 front door window regulator sub-assembly RH and F4 front door window regulator sub-assembly LH connectors.
(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WITH A NORMAL ONE
A -- Continue to next step.
4. CHECK FOR DTC
(a) Disconnect the E4 front door window regulator sub-assembly RH connector.
(b) Connect the 3C instrument panel junction block assembly, F1 power window regulator master switch assembly and F4 front door window regulator sub-assembly LH connectors.
(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- REPLACE FRONT DOOR WINDOW REGULATOR SUB-ASSEMBLY RH WITH A NORMAL ONE
A -- Continue to next step.
5. CHECK FOR DTC
(a) Disconnect the F4 front door window regulator sub-assembly LH connector.
(b) Connect the 3C instrument panel junction block assembly, F1 power window regulator master switch assembly and E4 front door window regulator sub-assembly RH connectors.
(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- REPLACE FRONT DOOR WINDOW REGULATOR SUB-ASSEMBLY LH WITH A NORMAL ONE
A -- Continue to next step.
6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
Text in Illustration
(a) Remove the instrument panel junction block assembly Removal.
(b) Remove the main body ECU from the instrument panel junction block assembly Removal.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Reinstall the main body ECU Installation.
(e) Reinstall the instrument panel junction block assembly Installation.
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- REPLACE MAIN BODY ECU Removal
7. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WITH A NORMAL ONE
(a) Replace the power window regulator master switch assembly with a normally functioning part Removal.
(b) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
8. RECONFIRM DTC OUTPUT
(a) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
A -- END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY MALFUNCTION)
9. REPLACE FRONT DOOR WINDOW REGULATOR SUB-ASSEMBLY RH WITH A NORMAL ONE
(a) Replace the front door window regulator sub-assembly RH with a normally functioning part Disassembly.
(b) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
10. RECONFIRM DTC OUTPUT
(a) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
A -- END (FRONT DOOR WINDOW REGULATOR SUB-ASSEMBLY RH MALFUNCTION)
11. REPLACE FRONT DOOR WINDOW REGULATOR SUB-ASSEMBLY LH WITH A NORMAL ONE
(a) Replace the front door window regulator sub-assembly LH with a normally functioning part Disassembly.
(b) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
12. RECONFIRM DTC OUTPUT
(a) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result
B -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
A -- END (FRONT DOOR WINDOW REGULATOR SUB-ASSEMBLY LH MALFUNCTION)
13. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
Text in Illustration
(a) Remove the instrument panel junction block assembly Removal.
(b) Remove the main body ECU from the instrument panel junction block assembly Removal.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Reinstall the main body ECU Installation.
(e) Reinstall the instrument panel junction block assembly Installation.
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- REPLACE MAIN BODY ECU Removal