DTC P0705 Transmission Range Sensor Circuit Malfunction. DTC P0850 Park/Neutral Switch Input Circuit

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Dominick Griffith
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1 DI0 DIANOSTICS AUTOMATIC TANSMISSION (A0E, A0F) DIE0 DTC 070 Transmission ange Sensor Circuit Malfunction (ND Input) DTC 00 ark/neutral Switch Input Circuit CICUIT DESCITION The park/neutral position switch detects the shift lever position and sends signals to the ECM. DTC No. DTC Detection Condition Trouble Area or more switches are ON simultaneously at, N, D, and positions (trip detection logic) remains ON while driving under conditions (a) and (b) for 0 sec. (trip detection logic) (a) Vehicle speed: 70 km/h ( mph) or more (b) Engine speed:,00,00 rpm Short in park/neutral position switch circuit it ECM MONITO DESCITION The park/neutral position switch detects the shift lever position and sends a signal to the ECM. For security, the park/neutral position switch detects the shift lever position so that engine can be started only when the vehicle is in or N shift position. hen the park/neutral position switch sends more than one signal at a time from switch positions,, N or D, the ECM interprets this as a fault in the switch. The ECM will turn on the MI and store the DTC. MONITO STATEY 070: elated DTCs 070 /Verify switch input equired sensors/components Frequency of operation Duration MI operation Sequence of operation 00: Continuous 0. sec. driving cycles None elated DTCs 00 /Verify switch cycling equired sensors/components Frequency of operation Duration MI operation Sequence of operation Continuous 0 sec. driving cycles None 00 TOYOTA TACOMA (M090U) 90

2 DIANOSTICS AUTOMATIC TANSMISSION (A0E, A0F) DI TYICA ENAIN CONDITIONS 070: Item Minimum Specification Maximum The monitor will run whenever the following DTCs are not present. See page DI7 The typical enabling condition is not available. 00: Item Minimum Specification Maximum The monitor will run whenever the following DTCs are not present. See page DI7 Vehicle speed 70 km/h ( mph) or more Engine speed,00 rpm or more,00 rpm or less Intake air amount per revolution 0. g/rev. or more TYICA MAFUNCTION THESHODS 070: Engine family Detection criteria Threshold ZFE Number of the following signal input at the same time NS switch switch D switch switch Number of the following signal input at the same time NS switch or more ON or more VZFE switch D switch switch ON 00: switch Detection criteria Threshold NS signal ON COMONENT OEATIN ANE 070: arameter 00: arameter Standard value The park/neutral position switch sends only one signal to the ECM Standard value The park/neutral position switch is OFF in above condition 00 TOYOTA TACOMA (M090U) 90

3 DI DIANOSTICS AUTOMATIC TANSMISSION (A0E, A0F) IIN DIAAM ZFE: J/ No. / No. AM I Ignition Switch Y I AUE F E ECM AM AT ST I 9 D J/ No. D J/ No. E E IK IK ark/neutral osition Switch 9 IK Y IK IK IK E J/ No. E J/C D J0 J9 attery E I IF J/ No. STA F / No. STATE elay Y 0 E E EA To STATE Y E Y E NS + J/ No. D9 D 00 TOYOTA TACOMA (M090U) 90

4 DIANOSTICS AUTOMATIC TANSMISSION (A0E, A0F) DI VZFE: J/ No. / No. AM I Ignition Switch Y I AUE F E ECM AM AT ST I 9 D J/ No. D J/ No. E E IK IK ark/neutral osition Switch 9 IK Y IK IK IK E J/ No. E J/C D J0 J9 attery E I IF J/ No. STA F STATE elay / No. Y 0 E E To STATE Y E EA Y E NS + J/ No. D77 D 00 TOYOTA TACOMA (M090U) 907

5 DI DIANOSTICS AUTOMATIC TANSMISSION (A0E, A0F) INSECTION OCEDUE ead N, EVESE, DIVE, ND and O signals. hen using handheld tester EAATION: (a) emove the DC cover. (b) Connect a handheld tester to the DC. (c) Turn the ignition switch ON and handheld tester main switch ON. CHECK: Shift lever into the,, N, and positions, and read the N, EVESE, ND and O signals on the handheld tester. OK: ZFE: () (+) NS VZFE: () (+) NS osition,n D Shift position NSody ody ody ody 7. V* 7. V 7. V 7. V 7. V* 7. V Signal ND OFF ON O OFF ON EVESE OFF ON, N N OFF ON hen not using handheld tester EAATION: Turn the ignition switch ON. CHECK: Measure voltage between terminals NS,, and of ECM and body when the shift lever is shifted to the following positions. OK: 7. V D0 HINT: *: The voltage will drop slightly due to lighting up of the back up light. OK Check and replace the ECM (See page IN ). N 00 TOYOTA TACOMA (M090U) 90

6 DIANOSTICS AUTOMATIC TANSMISSION (A0E, A0F) DI Check park/neutral position switch. 9 7 EAATION: emove the park/neutral position switch. CHECK: Check the continuity between the switch terminals when operating the switch lever, as shown in the table below. OK: Switch osition Terminal No. Specified Condition D0 Except Except Except and N Except and N 9 N eplace park/neutral position switch (See page AT9 ). OK Check harness and connector between ECM and park/neutral position switch. N epair or replace harness and connector. OK Check and replace the ECM (See page IN ). 00 TOYOTA TACOMA (M090U) 909

2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM TERMINALS OF ECM E4 E5 E7 E8

2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM TERMINALS OF ECM E4 E5 E7 E8 35 TERMINALS OF ECM E4 E5 E7 E8 7 6 5 4 3 2 1 7 6 5 4 3 2 1 6 5 4 3 2 1 7 6 5 4 3 2 1 17 16 15 14 13 12 11 10 9 8 19 18 17 16 15 14 13 12 11 10 9 8 16 15 14 13 12 11 10 9 8 7 17 16 15 14 13 12 11 10 9