B13FE

Code

LAND ROVER B — Body

Advanced semiautomatic parallel park request output

Brand: LAND ROVER

Type: B — Body

Views: UK: 12 EN: 27 RU: 15

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Page language: EN

Causes

Open, shorted or corroded wiring in the ASPP request output circuit
Poor or missing ground or supply to the park assist/ASPP module
Blown fuse or faulty relay feeding the park request circuit
Faulty park request switch or steering/console control input
ASPP/park assist control module internal fault or software error
Intermittent CAN/bus communications between modules

Symptoms

Semiautomatic parallel park feature will not activate when requested
System shows warning or fault message on the instrument cluster or infotainment screen
Indicator lamp or message stating park assist unavailable
Intermittent operation of the park assist function
No audible confirmation when park request is made

What to check

Read stored and pending DTCs and freeze frame data with a compatible Land Rover diagnostic tool
Verify vehicle battery voltage and charging system (12–14 V) before testing
Inspect fuses and relays related to park assist/ASPP circuits
Visually inspect connectors and harnesses at the park assist module, console switches and nearby harness for corrosion or damage
Check for related U-codes (CAN communications) that could affect the ASPP module
Measure request output signal at the module connector while operating the park request switch

Signal parameters

Type: discrete digital request output from ASPP/park assist control (may be switched 12 V or low-side pull to ground depending on vehicle design)
Expected inactive state: near 0 V (ground) or floating (depends on module design) — check manufacturer wiring diagram
Expected active state: approximately battery voltage (~12–14 V) or driven low to ground when active (confirm with model-specific documentation)
Behaviour: should assert when the driver requests semiautomatic parallel park and remain asserted while the system is active
If the output is CAN-based, expected: valid CAN messages present on the network and no timeout/fault for the ASPP message

Diagnostic algorithm

Connect a Land Rover-compatible diagnostic scanner and record all codes, freeze frame and live data related to park assist/ASPP and CAN networks.
Verify battery voltage and charge if necessary. Low battery can cause spurious faults.
Inspect fuses/relays for the park assist and ASPP module; replace any blown fuses and re-test.
Visually inspect connectors and wiring at the park assist/ASPP module, park request switch/button, and any intermediate junctions for corrosion, bent pins, water ingress or damage.
With ignition in the correct position, backprobe the request output pin at the ASPP module connector and observe the signal while pressing the park request switch. Compare readings to manufacturer expected values.
If the output does not change as expected, trace wiring back to the switch and check continuity and for shorts to power or ground (use ohmmeter with battery disconnected).
Check associated grounds for resistance to vehicle chassis; clean and secure ground points if high resistance is found.
If the request output is present at the module but the rest of the system does not react, check CAN bus health and look for related U-codes indicating loss of communication with relevant modules (BCM, ECM, instrument cluster).
If wiring and switch verify OK, follow manufacturer procedure to test or reflash the ASPP/park assist control module software. Perform any available module self-tests or calibrations.
If module bench tests or dealer-level diagnostics confirm internal module fault, replace the park assist/ASPP module and perform required programming and system calibration. Re-scan to confirm the code does not return.
Note: always follow manufacturer wiring diagrams and safety procedures. If unsure, refer the vehicle to a Land Rover dealer or qualified workshop.

Likely causes

Loose or corroded connector at the ASPP/park assist control module
Broken wire or short to ground in the request output conductor
Failed park request switch (button) or its connector
Blown fuse supplying the park assist module
Internal failure of the park assist/ASPP module or firmware glitch

Fault status

⚠️ Status

Advanced semiautomatic parallel park request output fault — request signal missing, intermittent or out of specification. Park assist may be disabled.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5 - 3.0 hours

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