B1160

Code

HUMMER B — Body

Loss of Serial Data - VIN Not Received

Brand: HUMMER

Type: B — Body

Views: UK: 9 EN: 19 RU: 14

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Page language: EN

Causes

Open, short, or high resistance in the serial data/CAN wiring or connectors
Loose, corroded, or damaged connector at BCM, IPC, ECM/PCM or gateway module
Faulty module that should transmit or forward the VIN (BCM, IPC, IPC cluster, PCM/gateway)
Network bus off condition or missing termination resistor
Software/configuration mismatch or corrupted module memory
Low battery or intermittent power/ground to one or more modules

Symptoms

DTC B1160 stored in one or more control modules
Scan tool cannot read vehicle VIN from modules
VIN missing or incorrect on instrument cluster, radio, or diagnostic tool
Vehicle may fail emissions or VIN verification checks
Intermittent or multiple network communication-related faults present
Some body functions or security features may be disabled or erratic

What to check

Verify battery voltage is within specification and battery terminals are clean and tight
Connect a capable scan tool and read all modules; note any other communication or U-codes
Attempt to read VIN via scan tool; note which module(s) report no VIN
Visually inspect connectors and harnesses at BCM, IPC, PCM/gateway and any inline connectors for corrosion, looseness, or damage
Check for recent work or aftermarket installations that may have altered wiring or added modules
Check for other communication DTCs (U-codes) that indicate bus issues

Signal parameters

Expected: active serial data on vehicle network at key-on and during diagnostics; VIN is broadcast or reported on request
Two-wire CAN: recessive idle level ~2.5 V on each line; combined bus termination typically ≈60 ohms across CAN_H/CAN_L (use manufacturer spec)
Single-wire networks (some GMLAN implementations) use pulsed serial levels—use oscilloscope or manufacturer values
No dominant/bus-off state on the network during idle; message frequencies vary by module but VIN should be available at key-on or when requested
Scan tool should show presence of VIN message or module that stores VIN (verify with data list or raw frames)

Diagnostic algorithm

Record all stored DTCs from every module and note module(s) reporting VIN missing
Verify battery state of charge and perform basic power/ground checks to BCM, IPC and gateway modules
Attempt to read VIN with a factory diagnostic tool or a capable scan tool; identify which control module lacks the VIN
Visually inspect and tug connectors at BCM, IPC, PCM and any gateway or distribution connectors; repair any corrosion or bent pins
Check for other communication codes (U-codes) to help localize bus segment or module failure
Measure resistance across CAN_H and CAN_L at a convenient connector; compare to factory spec (typically ≈60 Ω)
Use a scan tool or oscilloscope to observe serial data while key is ON: verify normal idle waveform and presence of VIN-related frames or responses
If bus signals are absent or corrupted, disconnect segments (module connectors) one at a time per factory isolation procedure to find the faulty module or shorted harness
If a specific module is suspected, verify power, ground, and local input/output signals to that module before replacing
After repair or module replacement, clear DTCs and verify VIN is present and communications are restored; perform any required reprogramming or configuration per manufacturer instructions

Likely causes

Damaged or disconnected connector at body control module (BCM) or instrument panel cluster (IPC)
Wiring chafe or pinched harness on CAN/data bus circuits
Faulty BCM or IPC that does not broadcast VIN
Missing or failed gateway/terminator on the data bus
Battery/ground problem causing intermittent module startup

Fault status

⚠️ Status

Loss of serial data for VIN — the module did not receive the vehicle identification number over the vehicle data network. Indicates a network wiring, connector, or module communication fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5 - 3.0 hours

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B1160 — Loss of Serial Data - VIN Not Received