DESCRIPTION
This DTC is stored when LIN communication between the front door window regulator LH*1 or RH*2 and main body ECU (instrument panel junction block assembly) stops for 10 seconds or more.
*1: for LHD
*2: for RHD
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
B2321 | No communication between the front door window regulator LH*1 or RH*2 and main body ECU (instrument panel junction block assembly) for 10 seconds or more. |
|
*1: for LHD
*2: for RHD
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
When using the intelligent tester with the ignition switch off to troubleshoot:
Connect the intelligent tester to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
Tech Tips
When communication between the front door window regulator LH*1 or RH*2 and main body ECU (instrument panel junction block assembly) stops, DTC B2325 is also stored.
*1: for LHD
*2: for RHD
PROCEDURE
CLEAR DTC
Clear the DTCs Click here.
NEXT |
CHECK FOR DTC
Check for DTCs Click here.
Result | Proceed to |
---|---|
DTC B2321 is output | A |
DTC B2321 is not output | B |
B |
USE SIMULATION METHOD TO CHECK Click here |
A |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT DOOR WINDOW REGULATOR)
*1 | for LHD |
*2 | for RHD |
*3 | Front view of wire harness connector (to Main Body ECU) |
*4 | Front view of wire harness connector (to Front Door Window Regulator LH [for LHD]) (to Front Door Window Regulator RH [for RHD]) |
Disconnect the H79 ECU connector.
Disconnect the K8*1 or J6*2 regulator connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
for LHD | |||||||||
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for RHD | |||||||||
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NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (FRONT DOOR WINDOW REGULATOR - BATTERY AND BODY GROUND)
*1 | for LHD |
*2 | for RHD |
*3 | Front view of wire harness connector (to Front Door Window Regulator LH [for LHD]) (to Front Door Window Regulator RH [for RHD]) |
Disconnect the K8*1 or J6*2 regulator connector.
*1: for LHD
*2: for RHD
Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
for LHD | ||||||
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for RHD | ||||||
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Standard Voltage | ||||||
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for LHD | ||||||
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for RHD | ||||||
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY
Temporarily replace the front door window regulator LH*1 or RH*2 with a new or normally functioning one Click here.
*1: for LHD
*2: for RHD
Clear the DTCs Click here.
NEXT |
CHECK FOR DTC
Check for DTCs Click here.
Result | Proceed to |
---|---|
DTC B2321 is not output | A |
DTC B2321 is output | B |
B |
REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
A |
END (FRONT DOOR WINDOW REGULATOR IS DEFECTIVE)