Code
C1217
HUMMER
C — Chassis
Pump Motor Shorted to Ground
Views:
UK: 10
EN: 19
RU: 12
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring harness (power lead shorted to ground)
- Corroded or damaged motor connector or terminals
- Failed pump motor with internal short to ground
- Faulty ABS/ESC hydraulic control module (driver transistor shorted)
- Failed relay or incorrect/faulty fuse
- Water intrusion or contamination in connector or pump assembly
Symptoms
- ABS warning lamp illuminated (ABS/ESC lamp may also be on)
- Traction control or stability control lamp may be illuminated
- ABS pump does not run when system requests it or runs intermittently
- Possible fuse blow or repeated relay clicking
- Reduced ABS functionality / longer stopping distance under heavy braking (ABS inoperative)
- Stored fault code(s) related to ABS pump motor circuit
What to check
- Confirm vehicle VIN, freeze frame and occurrence data from ABS/ESC module using scan tool
- Visually inspect pump motor connector and wiring harness for damage, melting, corrosion, or signs of water intrusion
- Check fuses and pump relay for proper operation
- With ignition off, disconnect pump motor connector and inspect pins for corrosion/shorts
- Perform a resistance/continuity check between pump motor positive feed and chassis ground (with connector disconnected)
- Use a digital multimeter or clamp ammeter to measure current draw when pump is commanded (if safe to do so)
Signal parameters
- Supply voltage to pump motor when commanded: ~11–14 V (battery voltage)
- Supply voltage to pump motor when not commanded: ~0 V (or open circuit)
- Continuity between pump positive terminal and chassis ground (with connector disconnected): normally open/high resistance; a short to ground will show near 0 Ω
- Typical pump current draw when running: varies by model (usually several amps — use clamp meter); abnormally high current suggests internal motor short
- ABS module driver output should show switching/command signal when pump is requested; a hard short will clamp this signal to ground
Diagnostic algorithm
- Read and record freeze frame and all ABS/ESC codes with a capable scan tool; note ignition state and voltage
- Perform a visual inspection of wiring and connectors at the ABS pump motor and module. Look for chafing, pinching, melted insulation, or signs of water/corrosion.
- Check fuses and the pump relay for continuity/function; replace suspected faulty relay or fuse with correct type.
- With ignition OFF, disconnect the pump motor connector. Measure resistance between the pump motor’s positive terminal and chassis ground. A low resistance (near 0 Ω) indicates the motor or its internal wiring is shorted to ground.
- If resistance is high/open with the connector disconnected, inspect harness continuity from the module relay output to the pump connector for shorts to ground or mis-routed/abraded wire sections.
- With connector disconnected and ignition ON (or as required by vehicle service manual), measure voltage at the pump power feed at the connector. If voltage is present when the module is commanding the pump and no short detected, the motor should run; if voltage is absent, suspect relay or module driver.
- If a short is still present at the harness side (connector disconnected) isolate by disconnecting sections or unplugging nearby harness connectors to find the short location.
- If the short is present only when the pump is connected, the pump motor assembly is likely faulty—replace or rebuild pump/motor assembly.
- If the short remains at the module output after disconnecting the harness and pump, suspect internal module driver fault; verify with bench tests per factory procedures and replace ABS/ESC control module if confirmed.
- After repairs, clear codes, cycle ignition, and perform a road test/ABS functional test. Re-scan to confirm the code does not return.
Likely causes
- Wiring abrasion at chassis harness routing near suspension or steering components
- Corroded/melted connector at pump motor (water intrusion)
- Pump motor internal failure resulting in low resistance to ground
- Shorted driver output inside ABS/ESC module (less common)
- Blown or weak pump relay allowing abnormal currents
Fault status
Status
ABS/ESC pump motor circuit fault: short to ground detected. ABS/ESC system may be disabled until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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Code
C1217
HYUNDAI
C — Chassis
Pulse Generator(PG)-B Sensor - Abnormal
Views:
UK: 14
EN: 20
RU: 17
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring harness (power lead shorted to ground)
- Corroded or damaged motor connector or terminals
- Failed pump motor with internal short to ground
- Faulty ABS/ESC hydraulic control module (driver transistor shorted)
- Failed relay or incorrect/faulty fuse
- Water intrusion or contamination in connector or pump assembly
Symptoms
- ABS warning lamp illuminated (ABS/ESC lamp may also be on)
- Traction control or stability control lamp may be illuminated
- ABS pump does not run when system requests it or runs intermittently
- Possible fuse blow or repeated relay clicking
- Reduced ABS functionality / longer stopping distance under heavy braking (ABS inoperative)
- Stored fault code(s) related to ABS pump motor circuit
What to check
- Confirm vehicle VIN, freeze frame and occurrence data from ABS/ESC module using scan tool
- Visually inspect pump motor connector and wiring harness for damage, melting, corrosion, or signs of water intrusion
- Check fuses and pump relay for proper operation
- With ignition off, disconnect pump motor connector and inspect pins for corrosion/shorts
- Perform a resistance/continuity check between pump motor positive feed and chassis ground (with connector disconnected)
- Use a digital multimeter or clamp ammeter to measure current draw when pump is commanded (if safe to do so)
Signal parameters
- Supply voltage to pump motor when commanded: ~11–14 V (battery voltage)
- Supply voltage to pump motor when not commanded: ~0 V (or open circuit)
- Continuity between pump positive terminal and chassis ground (with connector disconnected): normally open/high resistance; a short to ground will show near 0 Ω
- Typical pump current draw when running: varies by model (usually several amps — use clamp meter); abnormally high current suggests internal motor short
- ABS module driver output should show switching/command signal when pump is requested; a hard short will clamp this signal to ground
Diagnostic algorithm
- Read and record freeze frame and all ABS/ESC codes with a capable scan tool; note ignition state and voltage
- Perform a visual inspection of wiring and connectors at the ABS pump motor and module. Look for chafing, pinching, melted insulation, or signs of water/corrosion.
- Check fuses and the pump relay for continuity/function; replace suspected faulty relay or fuse with correct type.
- With ignition OFF, disconnect the pump motor connector. Measure resistance between the pump motor’s positive terminal and chassis ground. A low resistance (near 0 Ω) indicates the motor or its internal wiring is shorted to ground.
- If resistance is high/open with the connector disconnected, inspect harness continuity from the module relay output to the pump connector for shorts to ground or mis-routed/abraded wire sections.
- With connector disconnected and ignition ON (or as required by vehicle service manual), measure voltage at the pump power feed at the connector. If voltage is present when the module is commanding the pump and no short detected, the motor should run; if voltage is absent, suspect relay or module driver.
- If a short is still present at the harness side (connector disconnected) isolate by disconnecting sections or unplugging nearby harness connectors to find the short location.
- If the short is present only when the pump is connected, the pump motor assembly is likely faulty—replace or rebuild pump/motor assembly.
- If the short remains at the module output after disconnecting the harness and pump, suspect internal module driver fault; verify with bench tests per factory procedures and replace ABS/ESC control module if confirmed.
- After repairs, clear codes, cycle ignition, and perform a road test/ABS functional test. Re-scan to confirm the code does not return.
Likely causes
- Wiring abrasion at chassis harness routing near suspension or steering components
- Corroded/melted connector at pump motor (water intrusion)
- Pump motor internal failure resulting in low resistance to ground
- Shorted driver output inside ABS/ESC module (less common)
- Blown or weak pump relay allowing abnormal currents
Fault status
Status
ABS/ESC pump motor circuit fault: short to ground detected. ABS/ESC system may be disabled until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
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Code
C1217
MITSUBISHI
C — Chassis
RL wheel SPD.SNSR.power circuit
Views:
UK: 8
EN: 16
RU: 13
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring harness (power lead shorted to ground)
- Corroded or damaged motor connector or terminals
- Failed pump motor with internal short to ground
- Faulty ABS/ESC hydraulic control module (driver transistor shorted)
- Failed relay or incorrect/faulty fuse
- Water intrusion or contamination in connector or pump assembly
Symptoms
- ABS warning lamp illuminated (ABS/ESC lamp may also be on)
- Traction control or stability control lamp may be illuminated
- ABS pump does not run when system requests it or runs intermittently
- Possible fuse blow or repeated relay clicking
- Reduced ABS functionality / longer stopping distance under heavy braking (ABS inoperative)
- Stored fault code(s) related to ABS pump motor circuit
What to check
- Confirm vehicle VIN, freeze frame and occurrence data from ABS/ESC module using scan tool
- Visually inspect pump motor connector and wiring harness for damage, melting, corrosion, or signs of water intrusion
- Check fuses and pump relay for proper operation
- With ignition off, disconnect pump motor connector and inspect pins for corrosion/shorts
- Perform a resistance/continuity check between pump motor positive feed and chassis ground (with connector disconnected)
- Use a digital multimeter or clamp ammeter to measure current draw when pump is commanded (if safe to do so)
Signal parameters
- Supply voltage to pump motor when commanded: ~11–14 V (battery voltage)
- Supply voltage to pump motor when not commanded: ~0 V (or open circuit)
- Continuity between pump positive terminal and chassis ground (with connector disconnected): normally open/high resistance; a short to ground will show near 0 Ω
- Typical pump current draw when running: varies by model (usually several amps — use clamp meter); abnormally high current suggests internal motor short
- ABS module driver output should show switching/command signal when pump is requested; a hard short will clamp this signal to ground
Diagnostic algorithm
- Read and record freeze frame and all ABS/ESC codes with a capable scan tool; note ignition state and voltage
- Perform a visual inspection of wiring and connectors at the ABS pump motor and module. Look for chafing, pinching, melted insulation, or signs of water/corrosion.
- Check fuses and the pump relay for continuity/function; replace suspected faulty relay or fuse with correct type.
- With ignition OFF, disconnect the pump motor connector. Measure resistance between the pump motor’s positive terminal and chassis ground. A low resistance (near 0 Ω) indicates the motor or its internal wiring is shorted to ground.
- If resistance is high/open with the connector disconnected, inspect harness continuity from the module relay output to the pump connector for shorts to ground or mis-routed/abraded wire sections.
- With connector disconnected and ignition ON (or as required by vehicle service manual), measure voltage at the pump power feed at the connector. If voltage is present when the module is commanding the pump and no short detected, the motor should run; if voltage is absent, suspect relay or module driver.
- If a short is still present at the harness side (connector disconnected) isolate by disconnecting sections or unplugging nearby harness connectors to find the short location.
- If the short is present only when the pump is connected, the pump motor assembly is likely faulty—replace or rebuild pump/motor assembly.
- If the short remains at the module output after disconnecting the harness and pump, suspect internal module driver fault; verify with bench tests per factory procedures and replace ABS/ESC control module if confirmed.
- After repairs, clear codes, cycle ignition, and perform a road test/ABS functional test. Re-scan to confirm the code does not return.
Likely causes
- Wiring abrasion at chassis harness routing near suspension or steering components
- Corroded/melted connector at pump motor (water intrusion)
- Pump motor internal failure resulting in low resistance to ground
- Shorted driver output inside ABS/ESC module (less common)
- Blown or weak pump relay allowing abnormal currents
Fault status
Status
ABS/ESC pump motor circuit fault: short to ground detected. ABS/ESC system may be disabled until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
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Code
C1217
Other
C — Chassis
ABS Inlet Valve Coil RF Circuit Short To Ground
Views:
UK: 18
EN: 44
RU: 32
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring harness (power lead shorted to ground)
- Corroded or damaged motor connector or terminals
- Failed pump motor with internal short to ground
- Faulty ABS/ESC hydraulic control module (driver transistor shorted)
- Failed relay or incorrect/faulty fuse
- Water intrusion or contamination in connector or pump assembly
Symptoms
- ABS warning lamp illuminated (ABS/ESC lamp may also be on)
- Traction control or stability control lamp may be illuminated
- ABS pump does not run when system requests it or runs intermittently
- Possible fuse blow or repeated relay clicking
- Reduced ABS functionality / longer stopping distance under heavy braking (ABS inoperative)
- Stored fault code(s) related to ABS pump motor circuit
What to check
- Confirm vehicle VIN, freeze frame and occurrence data from ABS/ESC module using scan tool
- Visually inspect pump motor connector and wiring harness for damage, melting, corrosion, or signs of water intrusion
- Check fuses and pump relay for proper operation
- With ignition off, disconnect pump motor connector and inspect pins for corrosion/shorts
- Perform a resistance/continuity check between pump motor positive feed and chassis ground (with connector disconnected)
- Use a digital multimeter or clamp ammeter to measure current draw when pump is commanded (if safe to do so)
Signal parameters
- Supply voltage to pump motor when commanded: ~11–14 V (battery voltage)
- Supply voltage to pump motor when not commanded: ~0 V (or open circuit)
- Continuity between pump positive terminal and chassis ground (with connector disconnected): normally open/high resistance; a short to ground will show near 0 Ω
- Typical pump current draw when running: varies by model (usually several amps — use clamp meter); abnormally high current suggests internal motor short
- ABS module driver output should show switching/command signal when pump is requested; a hard short will clamp this signal to ground
Diagnostic algorithm
- Read and record freeze frame and all ABS/ESC codes with a capable scan tool; note ignition state and voltage
- Perform a visual inspection of wiring and connectors at the ABS pump motor and module. Look for chafing, pinching, melted insulation, or signs of water/corrosion.
- Check fuses and the pump relay for continuity/function; replace suspected faulty relay or fuse with correct type.
- With ignition OFF, disconnect the pump motor connector. Measure resistance between the pump motor’s positive terminal and chassis ground. A low resistance (near 0 Ω) indicates the motor or its internal wiring is shorted to ground.
- If resistance is high/open with the connector disconnected, inspect harness continuity from the module relay output to the pump connector for shorts to ground or mis-routed/abraded wire sections.
- With connector disconnected and ignition ON (or as required by vehicle service manual), measure voltage at the pump power feed at the connector. If voltage is present when the module is commanding the pump and no short detected, the motor should run; if voltage is absent, suspect relay or module driver.
- If a short is still present at the harness side (connector disconnected) isolate by disconnecting sections or unplugging nearby harness connectors to find the short location.
- If the short is present only when the pump is connected, the pump motor assembly is likely faulty—replace or rebuild pump/motor assembly.
- If the short remains at the module output after disconnecting the harness and pump, suspect internal module driver fault; verify with bench tests per factory procedures and replace ABS/ESC control module if confirmed.
- After repairs, clear codes, cycle ignition, and perform a road test/ABS functional test. Re-scan to confirm the code does not return.
Likely causes
- Wiring abrasion at chassis harness routing near suspension or steering components
- Corroded/melted connector at pump motor (water intrusion)
- Pump motor internal failure resulting in low resistance to ground
- Shorted driver output inside ABS/ESC module (less common)
- Blown or weak pump relay allowing abnormal currents
Fault status
Status
ABS/ESC pump motor circuit fault: short to ground detected. ABS/ESC system may be disabled until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
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