Code
B0038
Generic
B — Body
Second Row Right Side Airbag Deployment Control
AI status
Completed
Completed
100%
Causes
- Open or short in the right second-row airbag squib/deployment loop
- Corroded, damaged or loose connector at the airbag or SRS (SDM) module
- Damaged wiring harness (chafing, pinched, rodent damage, water ingress)
- Faulty second-row right-side airbag (squib or inflator)
- Faulty Supplemental Restraint System (SRS) / Sensing and Diagnostic Module (SDM) or software error
- Poor ground or battery voltage issues during self-test
Symptoms
- SRS/Airbag warning lamp illuminated or flashing on instrument panel
- DTC B0038 logged in SRS memory (may be stored as active or historic)
- Reduced functionality of SRS for second-row right-side seating position
- Possible diagnostic communication faults with airbag module
- Vehicle may refuse to pass safety/inspection with SRS warning active
What to check
- Read SRS module with a capable scan tool; record freeze-frame and any related codes
- Verify SRS warning lamp behavior and when code was set (current vs historic)
- Visually inspect right second-row seat/door area: connectors, seat tracks, harness routing, evidence of water/physical damage
- Check for signs of prior collision repair or airbag replacement and correct module coding
- Confirm battery voltage is stable and battery connections are clean before diagnostics
- Follow manufacturer battery disconnect and SRS safe‑wait procedure before touching connectors
Signal parameters
- Typical squib (deployment loop) resistance: low ohms range (commonly ~1–5 Ω) — open = infinite Ω, short = near 0 Ω (exact spec varies by vehicle)
- Connector pin voltage: normally battery voltage present at system wake or via diagnostic injection (refer to vehicle spec)
- Continuity between airbag connector and SRS module pin expected (near 0 Ω excluding squib resistance)
- Scan tool live data: circuit fault flags, current/voltage monitored by SDM, readiness/status bits (see manufacturer values)
Diagnostic algorithm
- Do not attempt repairs with battery connected. Use manufacturer procedure: disconnect battery negative and wait specified SRS discharge time.
- Use a factory-level or SRS-capable scan tool to confirm B0038 and note related codes or freeze-frame data.
- Visually inspect the right second-row seat/door area and routing of the airbag harness for damage, corrosion, or loose connectors.
- Reconnect battery and use scan tool to perform an SRS component test (if available) and report live values for the right-side squib circuit.
- With battery disconnected and following safe-wait time, check continuity between the SRS module connector and the airbag connector. Compare measured squib resistance to manufacturer specification.
- Inspect and repair any damaged wiring or connectors: reseal or replace corroded connectors, repair pin damage, and secure harness routing.
- If wiring and connectors are good but resistance indicates a shorted squib, replace the second-row right-side airbag assembly per manufacturer instructions.
- If squib and wiring are good, check SRS/SDM operation and programming; reflash or replace module only after verifying wiring and components.
- After repairs, clear DTCs with scan tool, perform system self-tests and any required SRS calibrations, and verify the SRS lamp extinguishes and code does not return.
Likely causes
- Open or shorted wiring between right second-row airbag and SRS module
- Corroded/loose connector at the airbag or seat/door harness junction
- Damaged airbag squib or inflator assembly
Fault status
Status
SRS airbag fault: Second-row right-side airbag deployment control circuit fault (B0038). SRS warning lamp is ON. Have the SRS system inspected and repaired following safety procedures.
Repair difficulty: Hard
Diagnostic time: 1.0 - 3.0 hours
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Repair manuals
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Code
B0038
HUMMER
B — Body
AUX switch open/shorted to battery
AI status
Completed
Completed
100%
Causes
- Open or short in the right second-row airbag squib/deployment loop
- Corroded, damaged or loose connector at the airbag or SRS (SDM) module
- Damaged wiring harness (chafing, pinched, rodent damage, water ingress)
- Faulty second-row right-side airbag (squib or inflator)
- Faulty Supplemental Restraint System (SRS) / Sensing and Diagnostic Module (SDM) or software error
- Poor ground or battery voltage issues during self-test
Symptoms
- SRS/Airbag warning lamp illuminated or flashing on instrument panel
- DTC B0038 logged in SRS memory (may be stored as active or historic)
- Reduced functionality of SRS for second-row right-side seating position
- Possible diagnostic communication faults with airbag module
- Vehicle may refuse to pass safety/inspection with SRS warning active
What to check
- Read SRS module with a capable scan tool; record freeze-frame and any related codes
- Verify SRS warning lamp behavior and when code was set (current vs historic)
- Visually inspect right second-row seat/door area: connectors, seat tracks, harness routing, evidence of water/physical damage
- Check for signs of prior collision repair or airbag replacement and correct module coding
- Confirm battery voltage is stable and battery connections are clean before diagnostics
- Follow manufacturer battery disconnect and SRS safe‑wait procedure before touching connectors
Signal parameters
- Typical squib (deployment loop) resistance: low ohms range (commonly ~1–5 Ω) — open = infinite Ω, short = near 0 Ω (exact spec varies by vehicle)
- Connector pin voltage: normally battery voltage present at system wake or via diagnostic injection (refer to vehicle spec)
- Continuity between airbag connector and SRS module pin expected (near 0 Ω excluding squib resistance)
- Scan tool live data: circuit fault flags, current/voltage monitored by SDM, readiness/status bits (see manufacturer values)
Diagnostic algorithm
- Do not attempt repairs with battery connected. Use manufacturer procedure: disconnect battery negative and wait specified SRS discharge time.
- Use a factory-level or SRS-capable scan tool to confirm B0038 and note related codes or freeze-frame data.
- Visually inspect the right second-row seat/door area and routing of the airbag harness for damage, corrosion, or loose connectors.
- Reconnect battery and use scan tool to perform an SRS component test (if available) and report live values for the right-side squib circuit.
- With battery disconnected and following safe-wait time, check continuity between the SRS module connector and the airbag connector. Compare measured squib resistance to manufacturer specification.
- Inspect and repair any damaged wiring or connectors: reseal or replace corroded connectors, repair pin damage, and secure harness routing.
- If wiring and connectors are good but resistance indicates a shorted squib, replace the second-row right-side airbag assembly per manufacturer instructions.
- If squib and wiring are good, check SRS/SDM operation and programming; reflash or replace module only after verifying wiring and components.
- After repairs, clear DTCs with scan tool, perform system self-tests and any required SRS calibrations, and verify the SRS lamp extinguishes and code does not return.
Likely causes
- Open or shorted wiring between right second-row airbag and SRS module
- Corroded/loose connector at the airbag or seat/door harness junction
- Damaged airbag squib or inflator assembly
Fault status
Status
SRS airbag fault: Second-row right-side airbag deployment control circuit fault (B0038). SRS warning lamp is ON. Have the SRS system inspected and repaired following safety procedures.
Repair difficulty: Hard
Diagnostic time: 1.0 - 3.0 hours
Similar codes
Repair manuals
Manual library for HUMMER
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