Supplemental Restraint Systems. Dtc B1810/53 Short In Driver Side Squib 2Nd Step Circuit

Vehicle Interior. Corolla. Zre142 Aze141

Supplemental Restraint Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CONNECTORS

CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)

CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT

CHECK CENTER AIRBAG SENSOR ASSEMBLY

CHECK INSTRUMENT PANEL WIRE

CHECK SPIRAL CABLE

DTC B1810/53 Short in Driver Side Squib 2nd Step Circuit

DTC B1811/53 Open in Driver Side Squib 2nd Step Circuit

DTC B1812/53 Short to GND in Driver Side Squib 2nd Step Circuit

DTC B1813/53 Short to B+ in Driver Side Squib 2nd Step Circuit

DESCRIPTION

The driver side squib 2nd step circuit consists of the center airbag sensor assembly, the spiral cable and the steering pad.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the driver side squib 2nd step circuit.

DTC No.	DTC Detection Condition	Trouble Area
B1810/53	The center airbag sensor assembly receives a short circuit signal 5 times in the driver side squib 2nd step circuit during primary check. Driver side squib 2nd step malfunction Spiral cable malfunction Center airbag sensor assembly malfunction	Instrument panel wire Spiral cable Steering pad (Driver side squib 2nd step) Center airbag sensor assembly
B1811/53	The center airbag sensor assembly receives an open circuit signal in the driver side squib 2nd step circuit for 2 seconds. Driver side squib 2nd step malfunction Spiral cable malfunction Center airbag sensor assembly malfunction	Instrument panel wire Spiral cable Steering pad (Driver side squib 2nd step) Center airbag sensor assembly
B1812/53	The center airbag sensor assembly receives a short circuit to ground signal in the driver side squib 2nd step circuit for 0.5 seconds. Driver side squib 2nd step malfunction Spiral cable malfunction Center airbag sensor assembly malfunction	Instrument panel wire Spiral cable Steering pad (Driver side squib 2nd step) Center airbag sensor assembly
B1813/53	The center airbag sensor assembly receives a short circuit to B+ signal in the driver side squib 2nd step circuit for 0.5 seconds. Driver side squib 2nd step malfunction Spiral cable malfunction Center airbag sensor assembly malfunction	Instrument panel wire Spiral cable Steering pad (Driver side squib 2nd step) Center airbag sensor assembly

WIRING DIAGRAM

Corolla. Zre142 Aze141.Supplemental Restraint Systems.Airbag System.
Dtc
B1810/53 Short In Driver Side Squib 2Nd Step Circuit

INSPECTION PROCEDURE

HINT:

Perform the simulation method by selecting Check Mode (signal check) using the Techstream (COROLLA_ZRE142 RM000000XFF0COX.html).
After selecting Check Mode (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road (COROLLA_ZRE142 RM000000XFD0GSX.html).

1.CHECK CONNECTORS

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

Check that the connectors are properly connected to the steering pad, spiral cable and center airbag sensor assembly.
OK:
The connectors are properly connected.
HINT:
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

Disconnect the connectors from the steering pad, spiral cable and center airbag sensor assembly.

Check that the terminals of the connectors are not damaged.
OK:
The terminals are not deformed or damaged.

Check that the spiral cable connector (on the steering pad side) is not damaged.
OK:
The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

Check that the short springs for the instrument panel wire and spiral cable with the activation prevention mechanism are not deformed or damaged.
OK:
The short springs are not deformed or damaged.

REPLACE WIRE HARNESS

OK

2.CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)

Connect the instrument panel wire to the center airbag sensor assembly and spiral cable.

Connect SST (resistance 2.1 Ω) to connector E (black connector).
CAUTION:
Never connect the tester to the steering pad (driver side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
1. Do not forcibly insert SST into the terminals of the connector when connecting.
2. Insert SST straight into the terminals of the connector.

SST: 09843-18061

Connect the cable to the negative (-) battery terminal.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).

Turn the ignition switch off.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
OK:
DTC B1810, B1811, B1812, B1813, or 53 is not output.
HINT:
Codes other than DTC B1810, B1811, B1812, B1813, and 53 may be output at this time, but they are not related to this check.

Go to step 3

REPLACE STEERING PAD (COROLLA_ZRE142 RM000000UW80A1X.html)

3.CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT

Turn the ignition switch off.

Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

Disconnect SST from connector E.

Disconnect the instrument panel wire from the center airbag sensor assembly.

Check for a short to B+ in the circuit.
1. Connect the cable to the negative (-) battery terminal.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  Y4-2 (D2+) - Body ground
  Ignition switch ON
  Below 1 V
  Y4-1 (D2-) - Body ground
  Ignition switch ON
  Below 1 V

Check for an open in the circuit.
1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  Y4-2 (D2+) - Y4-1 (D2-)
  Always
  Below 1 Ω

Check for a short to ground in the circuit.
1. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  Y4-2 (D2+) - Body ground
  Always
  1 MΩ or higher
  Y4-1 (D2-) - Body ground
  Always
  1 MΩ or higher

Check for a short in the circuit.
1. Release the activation prevention mechanism built into connector B (COROLLA_ZRE142 RM000000XFD0GSX.html).
2. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  Y4-2 (D2+) - Y4-1 (D2-)
  Always
  1 MΩ or higher

Go to step 5

OK

4.CHECK CENTER AIRBAG SENSOR ASSEMBLY

Restore the released activation prevention mechanism of connector B to the original condition.

Connect the connectors to the steering pad and the center airbag sensor assembly.

Connect the cable to the negative (-) battery terminal.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).

Turn the ignition switch off.

Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
OK:
DTC B1810, B1811, B1812, B1813, or 53 is not output.
HINT:
Codes other than DTC B1810, B1811, B1812, B1813, and 53 may be output at this time, but they are not related to this check.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (COROLLA_ZRE142 RM000000UWV074X.html)

USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000XFD0GSX.html)

5.CHECK INSTRUMENT PANEL WIRE

Restore the release activation prevention mechanism of connector B to the original condition.

Disconnect the instrument panel wire from the spiral cable.

Check for a short to B+ in the circuit.
1. Connect the cable to the negative (-) battery terminal.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  E7-4 (D2+) - Body ground
  Ignition switch ON
  Below 1 V
  E7-3 (D2-) - Body ground
  Ignition switch ON
  Below 1 V

Check for an open in the circuit.
1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E7-4 (D2+) - E7-3 (D2-)
  Always
  Below 1 Ω

Check for a short to ground in the circuit.
1. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E7-4 (D2+) - Body ground
  Always
  1 MΩ or higher
  E7-3 (D2-) - Body ground
  Always
  1 MΩ or higher

Check for a short in the circuit.
1. Release the activation prevention mechanism built into connector B (COROLLA_ZRE142 RM000000XFD0GSX.html).
2. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E7-4 (D2+) - E7-3 (D2-)
  Always
  1 MΩ or higher

REPLACE INSTRUMENT PANEL WIRE

OK

6.CHECK SPIRAL CABLE

Check for a short to B+ in the circuit.
1. Connect the cable to the negative (-) battery terminal.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  Y4-2 (D2+) - Body ground
  Ignition switch ON
  Below 1 V
  Y4-1 (D2-) - Body ground
  Ignition switch ON
  Below 1 V

Check for an open in the circuit.
1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  Y4-2 (D2+) - Y4-1 (D2-)
  Always
  Below 1 Ω

Check for a short to ground in the circuit.
1. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  Y4-2 (D2+) - Body ground
  Always
  1 MΩ or higher
  Y4-1 (D2-) - Body ground
  Always
  1 MΩ or higher

Check for a short in the circuit.
1. Release the activation prevention mechanism built into connector D (COROLLA_ZRE142 RM000000XFD0GSX.html).
2. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  Y4-2 (D2+) - Y4-1 (D2-)
  Always
  1 MΩ or higher

REPLACE SPIRAL CABLE (COROLLA_ZRE142 RM000000UWD09PX.html)

USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000XFD0GSX.html)

Tester Connection	Switch Condition	Specified Condition
Y4-2 (D2+) - Body ground	Ignition switch ON	Below 1 V
Y4-1 (D2-) - Body ground	Ignition switch ON	Below 1 V

Tester Connection	Condition	Specified Condition
Y4-2 (D2+) - Y4-1 (D2-)	Always	Below 1 Ω