Motorola Moto X Pure Edition Troubleshooting Manuals page 20

SIM (cont'd)
In the event of SIM issue:
• Do a thorough visual check on SIM connector M4201 and M4202 for any sign of
mechanical contact issues.
• Inspect all SIM circuit components on PCB.
• Check SIM power at C4203 (for primary SIM) and at C4223 (for secondary SIM)
and SIM card detection signal TRAY_DET at E4210. TRAY_DET is high when
tray is inserted.
• Check SIM bus interface signal activities during SIM access (UIMx_RST,
UIMx_CLK, UIMx_DATA).
MOTOROLA CONFIDENTIAL
Moto X Pure Edition/Moto X Style
Baseband TROUBLESHOOTING GUIDES