What was found
AFTER CONFIGURING THE PRESSURIZATION "BLEEDS OFF" PILOTS NOTED THE "CREW ALERT" FOR ENGINE NR 2 STARTER VALVE NOT IN COMMANDED POSITION. ACFT GROUNDED. R & R MW0312 NACELLE WIRING HARNESS, REF AMM 71-51-03-000-801-F00, ITEM 5. REPLACED NR 2 ENGINE START VALVE REF AMM 80-11-03, OPS AND LEAK CHECK GOOD. PERFORMED OPS CHECK FOR WIRE HARNESS, EEC BITE TEST AND ACTUATORS TEST REF AMM 71-00-00 AND 73-21-00. WHILE ACCOMPLISHING ACTUATORS TEST, RECEIVED MAINTENANCE MESSAGE HPTACC POSITION SIGNAL IS OUT OF RANGE AND FAULT CODE 75-10362. ACCOMPLISHED FIM 75-21, TASK 802, CONFIRMED FAULT. ACCOMPLISHED STEP 4, RESISTANCE CK. ALL CK'S GOOD. CLEANED CONNECTOR DP0903 (CH A) ALSO VALVE SIDE. SWAPPED CH A&B CONNECTORS IAW STEP 5, TEST PASS. RESTORED CONNECTORS TO ORIGINAL POSITION AND ACTUATORS TEST PASS IAW AMM 71-00-00-700-807-FOO.