Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC1997SEVILLE SLSREPAIR AND DIAGNOSISBODY & FRAMESEATSMEMORY SYSTEMSELF-DIAGNOSTICSDIAGNOSTIC TROUBLE CODES (DTCS)
1997 Cadillac Seville SLS
Diagnostic Trouble Codes (DTCS)
1997 Cadillac Seville SLSSECTION Diagnostic Trouble Codes (DTCS)
MEMORY SEAT MODULE (MSM) DTCS (1)
| MSM DTC | Affected System | ||||||
|---|---|---|---|---|---|---|---|
| B1656 | EEPROM Write Error | ||||||
| B1658 | EEPROM Checksum Error | ||||||
| B0846 | 5-Volt Feed Failure | ||||||
| B0856 | Dirty Battery Failure | ||||||
| B1982 | Battery/Source Voltage High | ||||||
| B1983 | Battery/Source Voltage Low | ||||||
| B2101 (2) | Recline Back Switch Failed | ||||||
| B2102 (2) | Recline Forward Switch Failed | ||||||
| B2103 (2) | Rear Height Down Switch Failed | ||||||
| B2104 (2) | Rear Height Up Switch Failed | ||||||
| B2105 (2) | Horizontal Back Switch Failed | ||||||
| B2106 (2) | Horizontal Forward Switch Failed | ||||||
| B2107 (2) | Front Height Down Switch Failed | ||||||
| B2108 (2) | Front Height Up Switch Failed | ||||||
| B2109 | Lumbar In Switch Failed | ||||||
| B2110 | Lumbar Out Switch Failed | ||||||
| B2111 | Lumbar Down Switch Failed | ||||||
| B2112 | Lumbar Up Switch Failed | ||||||
| B2115 | Recline Sensor Failed | ||||||
| B2116 | Rear Height Sensor Failed | ||||||
| B2117 | Forward/Back Sensor Failed | ||||||
| B2118 | Front Height Sensor Failed | ||||||
| B2119 | Lumbar In/Out Sensor Failed | ||||||
| B2120 | Lumbar Up/Down Sensor Failed | ||||||
| B2130 | Seat Motor Failure | ||||||
| U1064 | (3) Loss of Serial Communications (PZM) | ||||||
| U1255 | Generic Loss of Serial Communications | ||||||
| U1300 | Class 2 Shorted To Ground/Voltage | ||||||
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MEMORY MIRROR MODULE (MMM) DTCS (1)
| MMM DTC | Affected System | ||||||
|---|---|---|---|---|---|---|---|
| B1656 | EEPROM Write Error | ||||||
| B1658 | EEPROM Checksum Error | ||||||
| B1982 | Battery/Source Voltage High | ||||||
| B1983 | Battery/Source Voltage Low | ||||||
| B2101 (2) | Recline Back Switch Failed | ||||||
| B2102 (2) | Recline Forward Switch Failed | ||||||
| B2103 (2) | Rear Height Down Switch Failed | ||||||
| B2104 (2) | Rear Height Up Switch Failed | ||||||
| B2105 (2) | Horizontal Back Switch Failed | ||||||
| B2106 (2) | Horizontal Forward Switch Failed | ||||||
| B2107 (2) | Front Height Down Switch Failed | ||||||
| B2108 (2) | Front Height Up Switch Failed | ||||||
| B2130 | Memory "1" Key Failed | ||||||
| B2131 | Memory "2" Key Failed | ||||||
| B2132 | Memory "Exit" Key Failed | ||||||
| B2133 | Memory "Set" Key Failed | ||||||
| B2140 | Mirror Up Switch Failed | ||||||
| B2141 | Mirror Down Switch Failed | ||||||
| B2142 | Mirror Left Switch Failed | ||||||
| B2143 | Mirror Right Switch Failed | ||||||
| B2144 | Driver Mirror Vertical Sensor Shorted To Ground | ||||||
| B2145 | Driver Mirror Vertical Sensor Shorted To Voltage | ||||||
| B2146 | Driver Mirror Horizontal Sensor Shorted To Ground | ||||||
| B2147 | Driver Mirror Horizontal Sensor Shorted To Voltage | ||||||
| B2148 | Passenger Mirror Vertical Sensor Shorted To Ground | ||||||
| B2149 | Passenger Mirror Vertical Sensor Shorted To Voltage | ||||||
| B2150 | Passenger Mirror Horizontal Sensor Shorted To Ground | ||||||
| B2151 | Passenger Mirror Horizontal Sensor Shorted To Voltage | ||||||
| U1064 | (3) Loss of Serial Communications (PZM) | ||||||
| U1128 | Loss of Serial Communications (IRC) | ||||||
| U1255 | Generic Loss of Serial Communications | ||||||
| U1300 | Class 2 Shorted To Ground/Voltage | ||||||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.