Narrative:

Blocked out on time. The ATIS temp was M12; with no visible moisture expected on climb. I failed to include the anticipated use of anti-ice for contaminants in my briefing. Following the #1 engine start; we were cleared for taxi. I had instructed the first officer (first officer) to start the #2 engine during the initial taxi movement. While making a sharp 180 degree turn from the gate; I noticed the ramp outside of the gate area was contaminated; and selected the anti-ice selector to on. After the #2 engine was started; we had an engine reference a-i disagree; with engine tds (temperature detection system) reference a-i engine EICAS messages. I had suspected it was due to the a-i mode selector being turned on and no anti-ice selection in the tds.when we got to an area of the taxiway without contaminants; the mode selector was moved back to automatic; but the fault did not clear. We ran the QRH; resending and resetting the takeoff data with engine anti-ice selected; this time; with no help. Maintenance control was contacted; and we shut down the engines. The messages cleared during shutdown; but returned when the engines were re-started and configured the same way. Discussed situation with on-duty cp (chief pilot) and coordinated with maintenance control to return to gate for a power reset. While waiting for maintenance; [I] researched the aom to find the engine reference a-i disag message will be present when the reference a/I is set to engine in the tds and the OAT is below 5 degrees celsius. At this point; it was evident why the messages were there; as the OAT was -12; and the a-i tds should have been set to all. Maintenance came out to the aircraft; ran the fim (fault isolation manual procedure); and cleared the log page item.anytime contaminants are reported/suspected; this should be briefed; and the appropriate anti-ice settings should be confirmed in the trs. Before leaving the gate; I should have recognized the tds anti-ice needed to be selected to all; for the corresponding OAT and conditions.

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Original NASA ASRS Text

Title: Captain reported EICAS anti-ice malfunction message annunciation during taxi for takeoff.

Narrative: Blocked out on time. The ATIS temp was M12; with no visible moisture expected on climb. I failed to include the anticipated use of anti-ice for contaminants in my briefing. Following the #1 engine start; we were cleared for taxi. I had instructed the FO (First Officer) to start the #2 engine during the initial taxi movement. While making a sharp 180 degree turn from the gate; I noticed the ramp outside of the gate area was contaminated; and selected the anti-ice selector to ON. After the #2 engine was started; we had an ENG REF A-I DISAGREE; with ENG TDS (Temperature Detection System) REF A-I ENG EICAS messages. I had suspected it was due to the A-I mode selector being turned ON and no anti-ice selection in the TDS.When we got to an area of the taxiway without contaminants; the mode selector was moved back to AUTO; but the fault did not clear. We ran the QRH; resending and resetting the takeoff data with ENG anti-ice selected; this time; with no help. Maintenance Control was contacted; and we shut down the engines. The messages cleared during shutdown; but returned when the engines were re-started and configured the same way. Discussed situation with on-duty CP (Chief Pilot) and coordinated with Maintenance Control to return to gate for a power reset. While waiting for Maintenance; [I] researched the AOM to find the ENG REF A-I DISAG message will be present when the REF A/I is set to ENG in the TDS and the OAT is below 5 degrees Celsius. At this point; it was evident why the messages were there; as the OAT was -12; and the A-I TDS should have been set to ALL. Maintenance came out to the aircraft; ran the FIM (Fault Isolation Manual Procedure); and cleared the log page item.Anytime contaminants are reported/suspected; this should be briefed; and the appropriate anti-ice settings should be confirmed in the TRS. Before leaving the gate; I should have recognized the TDS anti-ice needed to be selected to ALL; for the corresponding OAT and conditions.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.