B1102

General Description

SRSCM (Supplemental Restraints System Control Module) checks input voltage when "IG ON" to make air bag system work properly.
If input voltage is out of normal range, there can be malfunction in system operation. In this case, Check battery and charging system.

DTC Description

The SRSCM sets DTC B1102 and turns warning light on if voltage below threshold value is detected for more than 4 sec. (If voltage within threshold value is detected When the SRSCM returns to normal condition. SRSCM regards DTC as being cleared and turns warning light off).

DTC Detecting Condition






Specification






Diagnostic Circuit Diagram






Monitor Scantool Data

1. Ignition "OFF", connect scantool.
2. Ignition "ON"& Engine "OFF", select "Current Data" mode.
3. Monitor the "Battery Voltage" parameter on the Scantool.

Specification :Approx. 8.38 ≤ Vbatt ≤ 17






Fig.1) Normal Data

4. Is DTC present problem ?






Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Charging System Inspection

1. Engine "ON", headlight and heat wire "ON".
2. Measure voltage between the battery terminal (+) and (-) maintaining ENG. RPM 2,500RPM (idle) over 2 minutes.

Specification :Approx. 8.38 ≤ Vbatt ≤ 17

3. Is the measured voltage within specifications?






Power Circuit Inspection

1. Ignition "OFF'.
2. Disconnect the battery (-) terminal cable from the battery, and wait at least one minutes.
3. Disconnect the SRSCM connector.
4. Connect the battery (-) terminal cable and start engine.
5. Measure voltage between power terminal of the SRSCM harness connector and chassis ground.

Specification :Approx. 8.38 ≤ Vbatt ≤ 17

6. Is the measured voltage within specifications?






Ground Circuit Inspection

1. Ignition "OFF".
2. Disconnect the battery (-) terminal cable from the battery, and wait at least one minutes.
3. Disconnect the SRSCM connector.
4. Measure resistance between ground terminal of the SRSCM harness connector and chassis ground.

Specification :Approx. 1 Ohms below.

5. Is the measured resistance within specifications?






Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes(DTC)" mode.
2. Using a scan tool, clear the DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTC present ?