Code
U0196
Generic
U — Network/User
Lost Communication With Entertainment Control Module - Rear A
Views:
UK: 15
EN: 22
RU: 30
AI status
Completed
Completed
100%
Causes
- No power or ground to the entertainment control module
- Faulty entertainment control module
- Open, shorted or intermittent wiring/connectors on the CAN/LIN network
- Failed gateway/BCM or other network node
- Corroded or loose connectors or fuses
- Module software or programming fault
Symptoms
- Rear entertainment screen(s) blank or unresponsive
- No audio or rear entertainment controls do not work
- One or more communication-related warning messages on dash or infotainment
- Multiple network modules showing communication faults
- Intermittent operation of rear entertainment functions
- Scan tool cannot communicate with Rear A entertainment module
What to check
- Verify other network modules can be scanned and note any additional U-codes
- Check fuses and relay(s) feeding the rear entertainment module
- Inspect connectors and harness for corrosion, damage or water intrusion at the module and splice points
- Measure module supply voltage with ignition ON (approx 11–14 V) and ground resistance near 0 Ω
- Check CAN bus termination resistance (typical ~60 Ω across CAN H and CAN L with key off) and continuity to other nodes
- Use a scan tool / network diagnostic tool to see if frames are present from the rear entertainment module
Signal parameters
- CAN idle voltages: CAN H ≈ 2.5 V, CAN L ≈ 2.5 V (recessive). Dominant: CAN H ≈ 3.5 V, CAN L ≈ 1.5 V (values vary by manufacturer)
- Typical CAN differential idle ≈ 0 V, differential dominant ≈ 2.0 V
- Expected termination resistance across CAN H and CAN L ≈ 60 Ω (two 120 Ω terminators in parallel)
- Module supply voltage ≈ 11–14 V with ignition on; ground ≈ 0 V
- Common data rates: 125, 250, 500 kbps (verify vehicle-specific bus speed)
Diagnostic algorithm
- Connect a capable scan tool and confirm U0196. Note any other U-codes and freeze frame data.
- Attempt to communicate with the Rear A entertainment module via scan tool. If no response, verify module power: backprobe the module supply pin for battery/ignition voltage with key ON.
- Verify ground(s) for the module by measuring voltage drop to chassis while operating or by checking continuity to battery negative with key off.
- Check relevant fuses and relays; replace if blown and re-test.
- Visually inspect the module connector, pins and wiring for corrosion, bent pins or moisture; repair as needed.
- With ignition ON, measure CAN H and CAN L voltages at the module connector. Compare to expected idle and dominant levels. If abnormal, trace wiring to next node looking for opens/shorts.
- Measure termination resistance across CAN H and CAN L at the module connector with key OFF; a very high or very low value indicates missing or duplicated terminators.
- If bus appears active, use a network tool or oscilloscope to capture traffic and verify whether the module transmits any frames. Look for bus errors or a bus-off condition.
- Perform a wiggle test on harness and connector while monitoring communications to find intermittent faults.
- If wiring and bus integrity are confirmed, check for available software updates and reprogramming notes for the entertainment module or gateway.
- Only after confirming no external faults, consider replacing the rear entertainment module. Ensure proper programming/initialization and anti-theft/security procedures are followed after replacement.
- Clear codes and retest to confirm repair. Monitor for reoccurrence and perform road test if necessary.
Likely causes
- Blown fuse or disconnected battery/ignition feed to the rear entertainment module
- Damaged CAN bus wiring or poor/cracked connector at module
- CAN bus short to battery or ground causing bus-off or no frames
- Faulty rear entertainment module or internal processor failure
- Gateway/BCM not forwarding messages or in sleep/secure state
- Failed termination resistor or incorrect bus termination
Fault status
Status
U0196 — Lost Communication With Entertainment Control Module - Rear A. The control module failed to respond to bus communications or is absent from the network.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
U0196
HYUNDAI
U — Network/User
Lost Communication With Rear Seat Entertainment Control Module
Views:
UK: 9
EN: 12
RU: 25
AI status
Completed
Completed
100%
Causes
- No power or ground to the entertainment control module
- Faulty entertainment control module
- Open, shorted or intermittent wiring/connectors on the CAN/LIN network
- Failed gateway/BCM or other network node
- Corroded or loose connectors or fuses
- Module software or programming fault
Symptoms
- Rear entertainment screen(s) blank or unresponsive
- No audio or rear entertainment controls do not work
- One or more communication-related warning messages on dash or infotainment
- Multiple network modules showing communication faults
- Intermittent operation of rear entertainment functions
- Scan tool cannot communicate with Rear A entertainment module
What to check
- Verify other network modules can be scanned and note any additional U-codes
- Check fuses and relay(s) feeding the rear entertainment module
- Inspect connectors and harness for corrosion, damage or water intrusion at the module and splice points
- Measure module supply voltage with ignition ON (approx 11–14 V) and ground resistance near 0 Ω
- Check CAN bus termination resistance (typical ~60 Ω across CAN H and CAN L with key off) and continuity to other nodes
- Use a scan tool / network diagnostic tool to see if frames are present from the rear entertainment module
Signal parameters
- CAN idle voltages: CAN H ≈ 2.5 V, CAN L ≈ 2.5 V (recessive). Dominant: CAN H ≈ 3.5 V, CAN L ≈ 1.5 V (values vary by manufacturer)
- Typical CAN differential idle ≈ 0 V, differential dominant ≈ 2.0 V
- Expected termination resistance across CAN H and CAN L ≈ 60 Ω (two 120 Ω terminators in parallel)
- Module supply voltage ≈ 11–14 V with ignition on; ground ≈ 0 V
- Common data rates: 125, 250, 500 kbps (verify vehicle-specific bus speed)
Diagnostic algorithm
- Connect a capable scan tool and confirm U0196. Note any other U-codes and freeze frame data.
- Attempt to communicate with the Rear A entertainment module via scan tool. If no response, verify module power: backprobe the module supply pin for battery/ignition voltage with key ON.
- Verify ground(s) for the module by measuring voltage drop to chassis while operating or by checking continuity to battery negative with key off.
- Check relevant fuses and relays; replace if blown and re-test.
- Visually inspect the module connector, pins and wiring for corrosion, bent pins or moisture; repair as needed.
- With ignition ON, measure CAN H and CAN L voltages at the module connector. Compare to expected idle and dominant levels. If abnormal, trace wiring to next node looking for opens/shorts.
- Measure termination resistance across CAN H and CAN L at the module connector with key OFF; a very high or very low value indicates missing or duplicated terminators.
- If bus appears active, use a network tool or oscilloscope to capture traffic and verify whether the module transmits any frames. Look for bus errors or a bus-off condition.
- Perform a wiggle test on harness and connector while monitoring communications to find intermittent faults.
- If wiring and bus integrity are confirmed, check for available software updates and reprogramming notes for the entertainment module or gateway.
- Only after confirming no external faults, consider replacing the rear entertainment module. Ensure proper programming/initialization and anti-theft/security procedures are followed after replacement.
- Clear codes and retest to confirm repair. Monitor for reoccurrence and perform road test if necessary.
Likely causes
- Blown fuse or disconnected battery/ignition feed to the rear entertainment module
- Damaged CAN bus wiring or poor/cracked connector at module
- CAN bus short to battery or ground causing bus-off or no frames
- Faulty rear entertainment module or internal processor failure
- Gateway/BCM not forwarding messages or in sleep/secure state
- Failed termination resistor or incorrect bus termination
Fault status
Status
U0196 — Lost Communication With Entertainment Control Module - Rear A. The control module failed to respond to bus communications or is absent from the network.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Code
U0196
LAND ROVER
U — Network/User
Lost communication with the entertainment control module rear A
Views:
UK: 6
EN: 8
RU: 20
AI status
Completed
Completed
100%
Causes
- No power or ground to the entertainment control module
- Faulty entertainment control module
- Open, shorted or intermittent wiring/connectors on the CAN/LIN network
- Failed gateway/BCM or other network node
- Corroded or loose connectors or fuses
- Module software or programming fault
Symptoms
- Rear entertainment screen(s) blank or unresponsive
- No audio or rear entertainment controls do not work
- One or more communication-related warning messages on dash or infotainment
- Multiple network modules showing communication faults
- Intermittent operation of rear entertainment functions
- Scan tool cannot communicate with Rear A entertainment module
What to check
- Verify other network modules can be scanned and note any additional U-codes
- Check fuses and relay(s) feeding the rear entertainment module
- Inspect connectors and harness for corrosion, damage or water intrusion at the module and splice points
- Measure module supply voltage with ignition ON (approx 11–14 V) and ground resistance near 0 Ω
- Check CAN bus termination resistance (typical ~60 Ω across CAN H and CAN L with key off) and continuity to other nodes
- Use a scan tool / network diagnostic tool to see if frames are present from the rear entertainment module
Signal parameters
- CAN idle voltages: CAN H ≈ 2.5 V, CAN L ≈ 2.5 V (recessive). Dominant: CAN H ≈ 3.5 V, CAN L ≈ 1.5 V (values vary by manufacturer)
- Typical CAN differential idle ≈ 0 V, differential dominant ≈ 2.0 V
- Expected termination resistance across CAN H and CAN L ≈ 60 Ω (two 120 Ω terminators in parallel)
- Module supply voltage ≈ 11–14 V with ignition on; ground ≈ 0 V
- Common data rates: 125, 250, 500 kbps (verify vehicle-specific bus speed)
Diagnostic algorithm
- Connect a capable scan tool and confirm U0196. Note any other U-codes and freeze frame data.
- Attempt to communicate with the Rear A entertainment module via scan tool. If no response, verify module power: backprobe the module supply pin for battery/ignition voltage with key ON.
- Verify ground(s) for the module by measuring voltage drop to chassis while operating or by checking continuity to battery negative with key off.
- Check relevant fuses and relays; replace if blown and re-test.
- Visually inspect the module connector, pins and wiring for corrosion, bent pins or moisture; repair as needed.
- With ignition ON, measure CAN H and CAN L voltages at the module connector. Compare to expected idle and dominant levels. If abnormal, trace wiring to next node looking for opens/shorts.
- Measure termination resistance across CAN H and CAN L at the module connector with key OFF; a very high or very low value indicates missing or duplicated terminators.
- If bus appears active, use a network tool or oscilloscope to capture traffic and verify whether the module transmits any frames. Look for bus errors or a bus-off condition.
- Perform a wiggle test on harness and connector while monitoring communications to find intermittent faults.
- If wiring and bus integrity are confirmed, check for available software updates and reprogramming notes for the entertainment module or gateway.
- Only after confirming no external faults, consider replacing the rear entertainment module. Ensure proper programming/initialization and anti-theft/security procedures are followed after replacement.
- Clear codes and retest to confirm repair. Monitor for reoccurrence and perform road test if necessary.
Likely causes
- Blown fuse or disconnected battery/ignition feed to the rear entertainment module
- Damaged CAN bus wiring or poor/cracked connector at module
- CAN bus short to battery or ground causing bus-off or no frames
- Faulty rear entertainment module or internal processor failure
- Gateway/BCM not forwarding messages or in sleep/secure state
- Failed termination resistor or incorrect bus termination
Fault status
Status
U0196 — Lost Communication With Entertainment Control Module - Rear A. The control module failed to respond to bus communications or is absent from the network.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email