Symptom Tree t046
Cause | Correction |
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Programmable parameters or selected features are not correct |
Check the programmable parameters and the selected features with an electronic service tool. Set the parameters and features again if necessary. Refer to Procedure 019-078. |
Manual fan ON/OFF switch and circuit is malfunctioning |
Check the manual fan ON/OFF switch and circuit. Refer to Manual Fan ON/OFF Switch, Resistance Check, and Short Circuit to Ground Check in Procedure 019-045. |
Air conditioner sensor or circuit is malfunctioning |
Check the air conditioner sensor and circuit. Refer to Air Conditioner Pressure Switch, Resistance Check, and Short Circuit to Ground Check in Procedure 019-262. |
Fan clutch actuator or circuit is malfunctioning |
Check the fan clutch actuator circuit. Refer to Procedure 019-045. |
Engine electrical ground is malfunctioning |
Check engine ground to chassis and chassis ground to battery negative (-) post. Refer to the OEM troubleshooting and repair manual and Procedure 013-009 in the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL CM2150 Service Manual, Bulletin 4021569. |