4.
Using a scantool, clear the DTC.
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.
The SRSCM sets DTC B1101 and turns warning light on if voltage above threshold value is detected for more than 4 sec.
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 for 4 sec. SRSCM regards DTC as being cleared and turns warning light off).
Item | Detecting Condition | Possible cause | ||
DTC Strategy | ● Check voltage | ● Poor connection of connected part ● Open/Short circuit in power harness. ● Open/Short circuit in ground harness. ● Faulty charging system ● Faulty SRSCM. | ||
Enable Conditions | ● Ignition "ON" | |||
Threshold Value | B1101 | ● Vbat ＞ 16.0 V | ||
B1102 | ● Vbat ＜ 8.02 V | |||
Diagnostic Time | Qualification | ● More than 4 sec | ||
De-Qualification | ● More than 4 sec | |||
Test Condition | Voltage |
Idle ＆ WOT | Approx. 9 ≤ Vbatt ≤ 16 |
Ignition "OFF", connect scantool.
Ignition "ON"＆ Engine "OFF", select "Diagnostic Trouble Codes(DTC)" mode.
Monitor diagnostic trouble code and present of trouble code.
Using a scantool, clear the DTC.
Is DTC present problem ?
▶ Go to "W/Harness Inspection" procedure.
▶ Displaying nothing(no DTC) or DTC with label "H"(historical) shows that Fault is intermittent caused by poor contact in the part's and/or SRSCM connector or was repaired and SRSCM memory was not cleared.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
▶ Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
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.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
▶ Go to "Charging System Inspection" procedure.
Ignition "OFF".
Disconnect the battery (-) terminal cable from the battery, and wait at least one minutes.
Disconnect the SRSCM connector.
Connect the battery (-) terminal cable and start engine.
Measure voltage between terminal "13" of the SRSCM harness connector and chassis ground.
■ Specification : Approx. 9V ~16V
Is the measured voltage within specifications?
▶ Go to "Ground circuit inspection" procedure.
▶ Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition "OFF".
Disconnect the battery (-) terminal cable from the battery, and wait at least one minutes.
Disconnect the SRSCM connector.
Measure resistance between terminal "2" of the SRSCM harness connector and chassis ground.
■ Specification : Approx. 1 Ω below.
Is the measured resistance within specifications?
▶ Substitute a known-good SRSCM, and check for proper operation.
If the problem is corrected, replace SRSCM and then go to "Verification of Vehicle Repair" procedure.
▶ Substitute the SRS main harness and check for proper operation.
If the problem is corrected, replace SRS main harness and then go to "Verification of Vehicle Repair" procedure.
Engine "ON", headight and heatwire "ON".
Measure voltage between the battery terminal (+) and (-) maintaining ENG. RPM 2,500RPM (idle) over 2 minutes.
■ Specification : Approx. 9V ~16V
Is the measured voltage within specifications?
▶ Go to "Power Circuit Inspection" procedure.
▶ Substitute with a known-good alternator and check for proper operation. If the problem is corrected, replace alternator and then go to "Verification of Vehicle Repair" procedure.
Refer to the DESCRIPTION in this TROUBLESHOOTING section.
