B1342

Code

LAND ROVER B — Body

Internal ABS control module failure

Brand: LAND ROVER

Type: B — Body

Views: UK: 17 EN: 36 RU: 52

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Page language: EN

Causes

Internal hardware failure in the ABS control module
Corrupted or failed module software/firmware
Intermittent or low battery/charging system voltage
Poor power or ground connection to the ABS module
Damaged or corroded connector or wiring harness to the module
CAN bus communication faults or wiring short/open

Symptoms

ABS warning lamp illuminated (may be steady or flashing)
Traction control / ESC warning lamp on
ABS/TC functions disabled; vehicle may show reduced braking performance under ABS events
Loss of communication with ABS module on diagnostic scanner
Stored DTCs related to ABS module internal fault and possibly related sensor faults
Brake pedal behavior may feel normal until ABS intervention is needed

What to check

Read all stored DTCs and freeze frame data with a capable scan tool; note related U- and C-codes
Check vehicle battery condition and charging system voltage (idle and under load)
Inspect ABS module connector for corrosion, damaged pins, water ingress, or loose connections
Verify fuses and relays feeding the ABS module
Check power and ground at the ABS module harness with a DMM (voltage and continuity)
Confirm CAN bus communication to the module (scan tool communication, CAN H/L voltages, termination)

Signal parameters

Module supply voltage (battery voltage at module pin) — typically ~12.0–14.5 V
Module ground continuity/resistance to chassis ground (should be near 0 ohms)
CAN H/L idle voltages (~2.5 V common mode) and differential behavior
Wheel speed sensor frequencies/voltages at each wheel with wheel rotation
Pump motor current draw and solenoid actuator outputs when commanded (if supported)
Module internal error/status bytes reported by manufacturer scan tool

Diagnostic algorithm

Use a manufacturer-capable scan tool to read B1342 and any related codes; record freeze frame and full code list.
Verify battery state of charge and charging system. Recharge/replace battery if voltage low; retest.
Inspect ABS module connector and wiring for damage, corrosion, bent pins, or water ingress; repair as needed.
Check fuses/relays related to ABS power and control circuits; replace faulty items.
With key on, engine off, measure supply voltage and ground at the ABS module connector; ensure stable supply and good ground.
Confirm CAN bus communication: verify the ABS module is present on the network and check CAN H/L voltages and termination resistances.
Use live data to compare wheel speed sensor inputs and look for noise or missing signals that could trigger internal errors.
Attempt module self-tests and actuator tests via the scan tool; note any failures reported by the module.
If wiring, power, and communications are confirmed good, attempt a software reflash/reprogram of ABS module per manufacturer procedures.
If reflash fails or internal faults persist after wiring and software checks, consider module repair or replacement and program/configure the replacement module as required.
Clear codes and road-test to verify repair; re-scan to ensure no return of B1342 or related codes.

Likely causes

ABS control module failed internally (component fault)
Poor ground or supply to module causing internal faults
Connector corrosion or pin damage at module
CAN bus short or termination problem preventing normal module operation
Software corruption that requires reflash or module replacement

Fault status

⚠️ Status

Internal ABS control module failure — module has detected an internal fault. ABS/ESC may be disabled and diagnostic trouble codes stored. Verify supply, grounds, wiring, and communications before considering module replacement.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1.5-3.0 hours

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B1342 — Internal ABS control module failure