B1103

DTC B1103 COMMUNICATION VOLTAGE TOO LOW

CIRCUIT DESCRIPTION
The diagnosis system malfunction display for this circuit is different to other circuits. When the SRS warning lamp remains lit up and the DTC is a B1101 or B1102 code, battery voltage too high or low is indicated. When voltage returns to normal, the SRS warn mg light automatically goes off and a malfunction is no longer indicated.

INSPECTION PROCEDURE
1. Preparation
1. Disconnect the negative (-) terminal cable from the battery, and wait at least 30 seconds.
2. Remove the DAB module.
3. Disconnect the connectors of the PAB, left and right side airbags, belt pretensioners and satellite sensors.




4. Disconnect the SRSCM connector.

WARNING: Place the DAB with the front surface facing upward.

2. Check source voltage.
1. Connect the negative (-) terminal cable to the battery.
2. Turn the ignition switch ON.

[CHECK]
Measure voltage between the battery supply terminal 26 of the SRS connector and body ground.

LIMIT: 10 - 16.5 V

[NG]-> Check the harness between the battery and the SRSCM. Check the battery and charging system

[OK]->

[PREPARATION]
1. Turn the ignition switch to LOCK.
2. Connect the DAB module.
3. Connect the PAB connector, left and right side airbag, belt pretensioner and satellite connectors.
4. Connect the SRSCM connector.




5. Turn the ignition switch ON.

[CHECK]
Check that the SRS warning light goes off.

[NG]-> Check for DTCs. If a DTC is output, perform troubleshooting for the DTC. If Bi 101 or Bi 102 is output, replace the SRSCM.

[OK]-> From the results of the above inspection, the malfunctioning part can now be considered normal.