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AUTOMATIC TRANSMISSION DIAGNOSIS TSB Revision AUTOMATIC TRANSMISSION 23A-297 DTC 41 (P0731): 1st Gear Incorrect Ratio . CIRCUIT OPERATION • The input shaft speed sensor generates a pulsed signal of 0 ⇔ 5 volts. The pulsed signal fre- quency increases with an increase in the input • The PCM (terminal 103) continuously monitors the input shaft speed signal. • The output shaft speed sensor generates a pulsed signal of 0 ⇔ 5 volts. The pulsed signal frequency increases with an increase in the out- • The PCM (terminal 104) continuously monitors the output shaft speed signal. . DESCRIPTIONS OF MONITOR METHODS <DTC . MONITOR EXECUTION <DTC 41 (P0731)> . MONITOR EXECUTION CONDITIONS (Other Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • DTC 27, 28 (P0705): Transmission range switch malfunction • DTC 22 (P0715): Input shaft speed sensor mal- function • DTC 23 (P0720): Output shaft speed sensor mal- function • DTC 36 (P0743): Torque converter clutch sole- noid malfunction • DTC 31 (P0753): Low-reverse solenoid malfunc- tion • DTC 32 (P0758): Underdrive solenoid malfunc- tion • DTC 33 (P0763): Second solenoid malfunction • DTC 34 (P0768): Overdrive solenoid malfunction • DTC 54 (P1751): A/T control relay malfunction Sensor (The sensor below is determined to be normal) • Input shaft speed sensor • Output shaft speed sensor • Transmission range switch • Torque converter clutch solenoid • Low-reverse solenoid • Underdrive solenoid • Second solenoid • Overdrive solenoid • A/T control relay . |