AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code
DTC B1837 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT (TO GROUND)
Diagnosis start condition:
Ignition voltage is 10 V to 16 V.
DTC detecting condition:
• Curtain airbag harness (LH) circuit is shorted to ground.
• Curtain airbag module (LH) is 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 POOR CONTACT OF CONNECTORS.
Check for poor contact of the connectors between the airbag control module, curtain airbag module LH and the curtain airbag sensor LH.
Is there poor contact?
Replace the airbag rear harness along with body harness.
Diagnostic Chart with Trouble Code > DTC B1837 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT (TO GROUND)">Go to Step 2.
2.CHECK CURTAIN AIRBAG MODULE.
1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.
2) Disconnect the connector (AB31), and connect the connector (1N) in test harness N to connector (AB31).
3) Connect the airbag resistor to the connector (2N) of test harness N.
4) Connect the battery ground terminal and turn the ignition switch to ON.
Does the airbag warning light illuminate for six seconds and go off?
Replace the curtain airbag module (LH). Curtain Airbag Module">
Diagnostic Chart with Trouble Code > DTC B1837 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT (TO GROUND)">Go to Step 3.
3.CHECK AIRBAG REAR HARNESS (CURTAIN AIRBAG MODULE HARNESS LH).
1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.
2) Disconnect the connector (AB21) from seat belt pretensioner (LH).
3) Disconnect connector (AB19) from side airbag module (LH).
4) Disconnect the airbag resistor from test harness N.
5) Disconnect the connectors (AB6, AB17, AB18) from airbag control module.
6) Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).
7) Measure the resistance between connector (6AG) in the test harness AG and chassis ground.
Connector & terminal
(6AG) No. 1 — Chassis ground:
(6AG) No. 3 — Chassis ground:
Is the resistance 1 M? or more?
Diagnostic Chart with Trouble Code > DTC B1837 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT (TO GROUND)">Go to Step 4.
Replace the airbag rear harness along with body harness.
4.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 B1837 displayed?
Replace the airbag control module. Airbag Control Module">
Diagnostic Chart with Trouble Code > DTC B1837 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT (TO GROUND)">Go to Step 5.
5.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.
Select lever
Select lever positions
Select lever button
With the brake pedal depressed,
shift
while pressing the select lever button in.
Shift while pressing the select
lever
button in.
Shift without pressing the
select lever
button.
The select lever has four positions, "P",
"R", "N", ...
Installation
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Welcome lighting function (if
equipped)
The welcome lighting function turns on the
low beam headlight for smooth approaching
to or exiting from the vehicle at night or
in a dark place.
The function is activated while all of the
following conditions are met.
The light control switch is in the
"AUTO" position
It is dark enoug ...