DTC B1637/85 Short to GND in Rear Curtain Shield Squib LH Circuit
DESCRIPTION
The rear curtain shield squib LH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1637/85 is recorded when a short to ground is detected in the rear curtain shield squib LH circuit.
DTC No. |
DTC Detecting Condition |
Trouble Area |
B1637/85 |
|
|
INSPECTION PROCEDURE
HINT:
1 CHECK CURTAIN SHIELD AIRBAG ASSEMBLY LH (REAR CURTAIN SHIELD SQUIB LH)
CAUTION: Never connect a tester to the curtain shield airbag assembly LH (Rear curtain shield squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE: Do not forcibly insert the SST into the terminals of the connector when connecting.
Insert the SST straight into the terminals of the connector.
SST 09843-18060
OK: DTC B1637/85 is not output.
HINT: Codes other than DTC B1637/85 may be output at this time, but they are not related to this check.
Go to step 2
REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY LH
2 CHECK FLOOR WIRE (REAR CURTAIN SHIELD SQUIB LH CIRCUIT)
Standard resistance
REPAIR OR REPLACE FLOOR WIRE
3 CHECK CENTER AIRBAG SENSOR ASSEMBLY
OK: DTC B1637/85 is not output.
HINT: Codes other than code B1637/85 may be output at this time, but they are not related to this check.
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
USE SIMULATION METHOD TO CHECK
Automatic door locking and unlocking systems
The following functions can be set or cancelled: For instructions on
customizing, refer to
Function
Operation
Shift position linked door
locking function
Shifting the shift lever out of P locks all the
doors
Shift position linked door
unlocking function
...
DTC check / clear
1. CHECK DTC
Connect the intelligent tester to the DLC3.
Connect the intelligent tester to the Controller
Area Network Vehicle Interface Module (CAN
VIM). Then connect the CAN VIM to the Data
Link Connector 3 (DLC3).
Turn the ignition switch to the ON posi ...
Terminals of ecu
1. A/C AMPLIFIER
HINT:
Check from the rear of the connector while it is
connected to the A/C amplifier.
(a) Waveform 1:
(b) Waveform 2: ...