If C1456 returns immediately, re-check wiring or consider a faulty ASTC ECU (rare, but possible).
: For models with electronic AWD control, an internal short circuit in the coupling coil or an overcurrent (exceeding 6 Amps) will deactivate the system and set this DTC. Mitsubishi Tech Info Diagnostic Steps Check CAN Bus Lines : Technical manuals from Mitsubishi Tech Info
The stop light switch shares a circuit with other chassis electronics. If fuse No. 15 (or equivalent depending on your model year) in the interior fuse box is blown, the circuit fails.
If C1456 returns immediately, re-check wiring or consider a faulty ASTC ECU (rare, but possible).
: For models with electronic AWD control, an internal short circuit in the coupling coil or an overcurrent (exceeding 6 Amps) will deactivate the system and set this DTC. Mitsubishi Tech Info Diagnostic Steps Check CAN Bus Lines : Technical manuals from Mitsubishi Tech Info
The stop light switch shares a circuit with other chassis electronics. If fuse No. 15 (or equivalent depending on your model year) in the interior fuse box is blown, the circuit fails.