TM 10-3930-675-20-10009 00-1COOLING FAN OPERATION AND FAN CONTROL TROUBLESHOOTING0009 00THIS WORK PACKAGE COVERSError Code 166 - Cooling Fan Speed, Wiring CircuitFailureError Code 167 - Cooling Fan Speed, Short Circuit Fail-ureError Code 426 - Fording Level Switch, Input ReadIncorrectINITIAL SETUPReferencesTM 10-3930-675-10Current Supply (A34738.0200) (WP 0199 00-31)ECS Electrical Servo (A34648.0200) (WP 0199 00-5)NOTE•Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrationsthat locate critical components.•Refer also to illustration at end of work package for component location.Table 1. Error Code 166 - Cooling Fan Speed, Wiring Circuit Failure Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 166 - Cooling Fan Speed, WiringCircuit Failure1. Disconnect connector 6037 atfan control valve, turnignition switch to ONposition and perform voltagecheck.If 20-25V is present at connector6037, replace fan control valve(WP 0174 00).2. Check voltage between con-nector X158 pin 9 and pin 10.a. If voltage is present, checkcontinuity between con-nector 6037 pin 1 andconnector X158 pin 9 andbetween connector 6037pin 2 and connector X158pin 10.If continuity is not present,repair or replace connectors (WP0111 00).TEST OR INSPECTION-DIAG SERVO11(13)OUTPUT/INPUTFAN 0mA 0mA BL.VALVE 0.00V 0mA
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