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307-01-39 Automatic Transmission 307-01-39 DIAGNOSIS AND TESTING (Continued) Fault Condition Default Operation Vehicle Speed Sensor Fault The PRNDL display will flash, Performance and Sequential Sports Shift modes will be inhibited and the torque converter will be unlocked at all times. If the transmission is in 4th gear at high engine speed it will stay in 4th gear, otherwise it will shift to 3rd Limp Home gear state. The vehicle will be speed limited to approximately 140 km/hr. The reverse lockout feature will only operate above engine speeds of 3000 ERPM. In the event of a loss of speed signal the engine speed is used to estimate vehicle speed. NOTE: Speedo transducer faults are likely to cause the vehicle’s speedometer to become inoperative. Gear Lever Fault (Inhibitor/PRNDL The gear lever is assumed to be in the Drive position, Sequential switch) Sports Shift and performance modes will be inhibited. The torque converter will be unlocked at all times. Transmission Oil Temperature All shifts will be firm until the transmission has warmed up, as a Sensing FaultTransmission Oil high transmission oil temperature is assumed. If a fault is Temperature Sensing Fault undetected, the temperature is likely to be evaluated as being lower than actual resulting in softer shifts with "end bump" (very firm feel at the end of the shift). Sequential Sports All shifts will occur as if the mode is set to Adaptive in the Shift/Performance Mode Setting instance of the Performance mode switch a being faulty.v Fault All shifts will occur as if the mode is set to Performance in the instance of the Sequential Sports Shift mode switches being faulty. The mode indicator will not respond to changes in the mode switch setting. If a fault is undetected, the mode as indicated by the mode indicator is likely to not respond to the mode switch. G73082 en |