Code
C0710
Generic
C — Chassis
ABS/Traction Control Module Communication Fault
AI status
Completed
Completed
100%
Causes
- Faulty ABS/traction control control module
- Intermittent or open/shorted wiring or connectors to ABS module
- Blown fuse or lost power/ground to ABS module
- CAN/LIN network fault, missing termination or wiring damage
- Other control module on the network is blocking/bus-off
- Corrosion, water intrusion, or mechanical damage at connectors
Symptoms
- ABS and/or traction control warning lamp illuminated
- Loss of ABS/TCS functionality or disabled during drive
- Related stability control warnings
- Intermittent communication errors on scan tool
- Occasional module resets or network-wide communication faults
What to check
- Retrieve all stored freeze frame and network U/C codes with a capable scan tool
- Inspect ABS module connectors for corrosion, bent pins, water intrusion
- Check ABS module supply voltage and ground (key on, engine off)
- Check fuses and relays for ABS/core chassis systems
- Scan the CAN/LIN bus for other modules reporting faults or bus-off conditions
- Visually inspect CAN wiring harness along suspected routing for damage
Signal parameters
- CAN bus nominal idle: CANH ≈ 2.5 V, CANL ≈ 2.5 V, differential ≈ 0 V
- CAN dominant: CANH ≈ 3.5–4.0 V, CANL ≈ 1.5–1.0 V (differential ≈ 2 V)
- Common CAN speeds: 250 kb/s or 500 kb/s — expected message rate from ABS module depends on vehicle
- Termination: expected ~60 ohms between CANH and CANL at the network (two 120 Ω in parallel)
- Scan-tool should show regular ABS module message ID(s) and consistent update rate (example: heartbeat every 100–200 ms)
Diagnostic algorithm
- Record all codes, symptoms, and current module comms status with a full-feature scan tool.
- Attempt to communicate with the ABS module using the scan tool. Note if the module responds intermittently or is not present.
- With key ON (engine off), measure battery voltage at the ABS module power pin and verify all required grounds have
- Inspect and wiggle ABS connectors while observing live data/communication to look for intermittent faults.
- Check related fuses/relays and restore power if found open. Re-test communication.
- Visually inspect CAN wiring and splices from ABS module to main bus for damage, corrosion, or aftermarket taps.
- Measure CANH and CANL idle voltages and differential. If voltages are out of expected range or bus is shorted, isolate sections of the bus to find fault.
- Use an oscilloscope (preferred) to view CAN waveform for reflections, missing termination, or noise. Compare to a known-good waveform if available.
- Scan for other modules reporting bus-off or errors. If another module is bus-off, isolate/repair that module first.
- If power/grounds and wiring are good and the bus is healthy but the ABS module still does not communicate, verify calibration/software version and reflash or reprogram per manufacturer procedures.
- Replace the ABS module only after confirming wiring, power, ground, and bus health. After replacement or repair, clear codes and perform a road test to confirm the fault does not return.
Likely causes
- Loose or corroded connector pins at ABS module
- Bad ground or low battery voltage during communication attempt
- Physical damage to CAN high/low wiring harness (abraded/chafed)
- Failed ABS module electronic board or transceiver
- Missing CAN termination resistor or short to battery/chassis
Fault status
Status
ABS/Traction Control module communication fault — module not responding or invalid messages on network.
Repair difficulty: Medium
Diagnostic time: 1.0 - 2.5 hours
Similar codes
Repair manuals
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Code
C0710
HUMMER
C — Chassis
Steering Position Signal Malfunction
AI status
Completed
Completed
100%
Causes
- Faulty ABS/traction control control module
- Intermittent or open/shorted wiring or connectors to ABS module
- Blown fuse or lost power/ground to ABS module
- CAN/LIN network fault, missing termination or wiring damage
- Other control module on the network is blocking/bus-off
- Corrosion, water intrusion, or mechanical damage at connectors
Symptoms
- ABS and/or traction control warning lamp illuminated
- Loss of ABS/TCS functionality or disabled during drive
- Related stability control warnings
- Intermittent communication errors on scan tool
- Occasional module resets or network-wide communication faults
What to check
- Retrieve all stored freeze frame and network U/C codes with a capable scan tool
- Inspect ABS module connectors for corrosion, bent pins, water intrusion
- Check ABS module supply voltage and ground (key on, engine off)
- Check fuses and relays for ABS/core chassis systems
- Scan the CAN/LIN bus for other modules reporting faults or bus-off conditions
- Visually inspect CAN wiring harness along suspected routing for damage
Signal parameters
- CAN bus nominal idle: CANH ≈ 2.5 V, CANL ≈ 2.5 V, differential ≈ 0 V
- CAN dominant: CANH ≈ 3.5–4.0 V, CANL ≈ 1.5–1.0 V (differential ≈ 2 V)
- Common CAN speeds: 250 kb/s or 500 kb/s — expected message rate from ABS module depends on vehicle
- Termination: expected ~60 ohms between CANH and CANL at the network (two 120 Ω in parallel)
- Scan-tool should show regular ABS module message ID(s) and consistent update rate (example: heartbeat every 100–200 ms)
Diagnostic algorithm
- Record all codes, symptoms, and current module comms status with a full-feature scan tool.
- Attempt to communicate with the ABS module using the scan tool. Note if the module responds intermittently or is not present.
- With key ON (engine off), measure battery voltage at the ABS module power pin and verify all required grounds have
- Inspect and wiggle ABS connectors while observing live data/communication to look for intermittent faults.
- Check related fuses/relays and restore power if found open. Re-test communication.
- Visually inspect CAN wiring and splices from ABS module to main bus for damage, corrosion, or aftermarket taps.
- Measure CANH and CANL idle voltages and differential. If voltages are out of expected range or bus is shorted, isolate sections of the bus to find fault.
- Use an oscilloscope (preferred) to view CAN waveform for reflections, missing termination, or noise. Compare to a known-good waveform if available.
- Scan for other modules reporting bus-off or errors. If another module is bus-off, isolate/repair that module first.
- If power/grounds and wiring are good and the bus is healthy but the ABS module still does not communicate, verify calibration/software version and reflash or reprogram per manufacturer procedures.
- Replace the ABS module only after confirming wiring, power, ground, and bus health. After replacement or repair, clear codes and perform a road test to confirm the fault does not return.
Likely causes
- Loose or corroded connector pins at ABS module
- Bad ground or low battery voltage during communication attempt
- Physical damage to CAN high/low wiring harness (abraded/chafed)
- Failed ABS module electronic board or transceiver
- Missing CAN termination resistor or short to battery/chassis
Fault status
Status
ABS/Traction Control module communication fault — module not responding or invalid messages on network.
Repair difficulty: Medium
Diagnostic time: 1.0 - 2.5 hours
Similar codes
Repair manuals
Manual library for HUMMER
138
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