e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)            TEST OPTIONS            Continuity Test or STE/ICE-R Test #91     REASON FOR QUESTION                 KNOWN INFO              9.        POSSIBLE PROBLEMS        Water temperature gage operates correctly. Main code 13, 22, or 25 not active in pushbutton shift selector. VOLTS gage operates correctly. Vehicle is equipped with WTEC II transmission controls. WTEC II dashboard cable assembly OK. WTEC II VIM OK. WTEC II cab transmission harness OK. Faulty CTIS cable assembly. Faulty CTIS ECU. Faulty speedometer. Is continuity absent from connector P110 socket U to ground? If continuity is present, wire 1793 in CTIS cable assembly is faulty. NO YES             KNOWN INFO                     POSSIBLE PROBLEMS        Water temperature gage operates correctly. Main code 13, 22, or 25 not active in pushbutton shift selector. VOLTS gage operates correctly. Vehicle is equipped with WTEC II transmission controls. WTEC II dashboard cable assembly OK. WTEC II VIM OK. WTEC II cab transmission harness OK. CTIS cable assembly OK. Faulty CTIS ECU. Faulty speedometer. 10. YES NO            TEST OPTIONS            Continuity Test or STE/ICE-R Test #91     REASON FOR QUESTION     Replace CTIS ECU (para 12-6). Is continuity absent from CTIS ECU connector pin U to ground? If continuity is present from CTIS ECU connector pin U to ground, CTIS ECU is faulty. CAUTION Read CAUTION on following page. Repair wire 1793 from connector P110 socket U to connector P111 socket B (para 2-40) or replace CTIS cable assembly (para 7-53). TM 9-2320-365-20-1 2-342          Change 1