DTC U263B-14: Light Control Module (RH) Power Supply Circuit (IG+) Malfunction [Body Control Module (BCM)]: Outline

DTC U263B:14 (BODY CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Light control module (RH) power supply circuit (IG+) malfunction
Detection condition	The light control module (RH) (built into front combination light (RH)) detects an open circuit in the power supply circuit (IG+).
Fail-safe	Not applicable
Possible cause	IG1 relay No. 2 malfunction and headlight relay malfunction Open circuit in following circuits: Headlight relay ground circuit Headlight relay power supply circuit Power supply circuit between IG1 relay No. 2 and headlight relay Short to ground in power supply circuit between IG1 relay No. 2 and headlight relay Front combination light (RH) connector or terminal malfunction Open circuit in front combination light (RH) power supply circuit (IG+) Front combination light (RH) internal malfunction Body control module (BCM) malfunction
Courtesy of MAZDA MOTORS CORP.