B1530: Memory Set Switch Circuit Short to Ground
The B1530 code indicates a short to ground in the memory set switch circuit. This switch is part of the driver seat memory module (DSM), which allows the driver to save and recall preferred positions for the seat, mirrors, and pedals. A short to ground prevents the module from correctly reading the switch signal, disabling the memory function.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty memory set switch with abnormal resistance to ground
- Damaged wiring insulation in the memory switch circuit contacting chassis ground
- Corroded, bent, or moisture-contaminated pins in the memory switch connector causing a ground path
- Internal input circuit failure in the driver seat memory module (DSM)
- Improperly installed aftermarket accessory or modification affecting the seat circuit
3. Symptoms You Will Notice
- Memory seat, mirror, and pedal recall functions inoperative
- Memory set button does not save or recall positions
- Possible illumination of the memory system warning light
4. Step-by-Step Diagnosis
Scan for additional codes and verify B1530 is present
Visually inspect the memory set switch and its connector for damage, corrosion, or bent pins
Test the switch circuit for continuity to ground using a multimeter
Check for short to ground in the wiring harness between the switch and DSM
If wiring and switch are okay, test the DSM by substitution or further diagnostics
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is safe to drive. The memory function will be disabled, but manual seat adjustments and normal driving controls remain unaffected.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the issue is a simple wiring repair or requires replacement of the switch or memory module.