B1352: Passenger Stage 1 High Resistance

Circuit fault

What B1352 means

Firing loops are held to a tight resistance window because the inflator needs a specific amount of current to work. The passenger first stage circuit runs from the SRSCM through the dash harness to the airbag in the instrument panel. When the measured resistance climbs above the top of that window, the module records B1352 and disables the system.

High resistance is the signature of a poor connection rather than a broken one. Corrosion, a partially seated terminal, or a pin with a weak grip adds resistance without cutting the circuit entirely. That is why these faults often come and go with temperature and vibration before they settle in permanently.

Common causes

• Corroded terminals at the passenger airbag connector adding resistance to the loop
• A connector only partly latched so the pins touch with reduced contact area
• A spread or backed out terminal at the SRSCM connector
• Damaged strands inside the dash harness reducing the effective conductor
• An inflator whose internal resistance has drifted out of specification

Crash data or hardware fault?

B1352 reports a measurement the module takes live, so it tracks the current health of the circuit and nothing about the vehicle's crash history. That history lives in a separate locked record written after a deployment, which no scan tool erases. Bring the resistance back into range and the code stops coming back.

Does our reset clear it?

Clearing the module does not lower resistance in a loop. Our mail-in reset restores modules holding crash data from a deployment, and a corroded connector is a repair job on the car. Address the connection or the inflator first. If the SRSCM is also locked on a recorded deployment, mail it in once the circuit reads within specification.

Which makes throw it

Hyundai uses B1352 for the passenger first stage loop measuring high. Hyundai assigns different codes to shorts, opens, and high resistance on the same circuit, so the distinction is worth reading before you start pulling parts.

What to do next

Unplug the passenger airbag connector and look at the terminal faces under light, because corrosion and a terminal that never fully seated cause most high resistance readings on this loop. Reseat the connector and measure again before replacing anything. If the loop still reads high with a clean connection, the inflator is the part at fault, and we carry genuine OEM Hyundai passenger airbags. Related codes: B1348, B1361, 01236.