TEST OPTIONS                REASON FOR QUESTION     17. If solenoid resistance is measured below 30 ohms or above 80 ohms, manifold valve assembly is faulty. YES NO             KNOWN INFO                     POSSIBLE PROBLEMS        VOLTS gage registers in green zone with engine running. Circuit breaker CB40 OK. FRONT BRAKE AIR and REAR BRAKE AIR pressure gages read normal. Air pressure switch OK. Start and charging cable assembly OK. Dashboard cable assembly OK. CTIS cable assembly OK. Faulty manifold valve assembly. Faulty CTIS ECU. Replace manifold valve assembly (para 12-7). Is continuity present at 30-80 ohms resistance from pneumatic controller connector pin F to pneumatic controller connector pin A? CAUTION Read CAUTION on following page. Resistance Test or STE/ICE-R Test #91             KNOWN INFO                         TEST OPTIONS                REASON FOR QUESTION            POSSIBLE PROBLEMS        VOLTS gage registers in green zone with engine running. Circuit breaker CB40 OK. FRONT BRAKE AIR and REAR BRAKE AIR pressure gages read normal. Air pressure switch OK. Start and charging cable assembly OK. Dashboard cable assembly OK. CTIS cable assembly OK. 16. If solenoid resistance is measured below 30 ohms or above 80 ohms, manifold valve assembly is faulty. Faulty manifold valve assembly. Faulty CTIS ECU. YES Replace manifold valve assembly (para 12-7). NO Resistance Test or STE/ICE-R Test #91 Is continuity present at 30-80 ohms resistance from pneumatic controller connector pin D to pneumatic controller connector pin B? CAUTION Read CAUTION on following page. e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT) TM 9-2320-365-20-1 2-918.4          Change 1