AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code
DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR
Diagnosis start condition:
Ignition voltage is 10 V to 16 V.
DTC detecting condition:
• Open or short circuit in harness of side sensor bus (RH)
• Side airbag sensor (RH) and curtain airbag sensor (RH) are faulty.
• Airbag control module is faulty.
CAUTION:
Before performing diagnosis, refer to “CAUTION” in “General Description”. General Description > CAUTION">
Wiring diagram:
Airbag system Airbag System > WIRING DIAGRAM">
STEP | CHECK | YES | NO |
1.CHECK DTC.
Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC)">
Is DTC B1622 or B1623 displayed?
Perform the diagnosis according to DTC.
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 2.
2.CHECK POOR CONTACT OF CONNECTORS.
Check for poor contact of the connectors between the airbag control module and the door sensor (RH).
Is there poor contact?
Replace the airbag rear harness and the door harness.
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 3.
3.CHECK AIRBAG REAR HARNESS (BETWEEN SIDE AIRBAG SENSOR (RH) AND CURTAIN AIRBAG SENSOR (RH)).
1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.
2) Disconnect the connector (AB26) from seat belt pretensioner (RH).
3) Disconnect the connector (AB33) from curtain airbag module (RH).
4) Disconnect connector (AB24) of the side airbag module (RH).
5) Disconnect connector (AB28) from side airbag sensor (RH).
6) Connect the connector (AB28) of side airbag sensor (RH) and the connector (1AI) in the test harness AI.
7) Connect the connector (2AI) in the test harness AI and the connector (1V) in the test harness V.
8) Disconnect the connector (AB34) from curtain airbag sensor (RH), and connect the connector (2V) in test harness V to connector (AB34).
9) Measure the resistance between connector (3V) terminals in the test harness V.
Connector & terminal
(3V) No. 2 — (3V) No. 6:
(3V) No. 1 — (3V) No. 7:
Is the resistance less than 10 ??
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 4.
Replace the airbag rear harness along with body harness.
4.CHECK AIRBAG REAR HARNESS (BETWEEN SIDE AIRBAG SENSOR AND CURTAIN AIRBAG SENSOR RH).
Measure the resistance between connector (3V) in test harness V and chassis ground, and the resistance between connector (3V) in test harness V.
Connector & terminal
(3V) No. 2 — Chassis ground:
(3V) No. 1 — Chassis ground:
(3V) No. 2 — (3V) No. 1:
Is the resistance 1 M? or more?
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 5.
Replace the airbag rear harness along with body harness.
5.CHECK AIRBAG CONTROL MODULE.
1) Connect all connectors.
2) Clear the memory. Clear Memory Mode">
3) Perform the Inspection Mode. Inspection Mode">
4) Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC)">
Is DTC B1633 displayed?
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 6.
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 7.
6.REPLACE CURTAIN AIRBAG SENSOR (RH) AND CHECK AIRBAG CONTROL MODULE AFTER REPLACEMENT.
1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.
2) Replace the curtain airbag sensor (RH). Curtain Airbag Sensor > REMOVAL">
3) Connect all connectors.
4) Clear the memory. Clear Memory Mode">
5) Perform the Inspection Mode. Inspection Mode">
6) Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC)">
Is DTC B1633 displayed?
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 7.
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 8.
7.REPLACE SIDE AIRBAG SENSOR (RH) AND CHECK AIRBAG CONTROL MODULE AFTER REPLACEMENT.
1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.
2) Replace the side airbag sensor (RH). Side Airbag Sensor > REMOVAL">
3) Connect all connectors.
4) Clear the memory. Clear Memory Mode">
5) Perform the Inspection Mode. Inspection Mode">
6) Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC)">
Is DTC B1633 displayed?
Replace the airbag control module. Airbag Control Module > REMOVAL">
Diagnostic Chart with Trouble Code > DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR">Go to Step 8.
8.CHECK FOR ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Check DTC using “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">
Finish the diagnosis.
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