WIRING DIAGRAM DI0A5–01
A00241 LOCK BATT(+) BE6653 P24330 S04162 Engine Room J/B EFI Fuse – DIAGNOSTICS ENGINE DI–127 279 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) INSPECTION PROCEDURE 1 Check voltage between terminal BATT of ECM connector and body ground. PREPARATION: Remove the glove compartment (See page SF–64 ). CHECK: Measure voltage between terminal BATT of ECM connector and body ground. OK: Voltage: 9 ∼ 14 V OK Check and replace ECM (See page IN–27 ). NG 2 Check EFI fuse. PREPARATION: Remove the EFI fuse from the engine room J/B. CHECK: Check continuity of EFI fuse. OK: Continuity NG Check for short in all harness and components connected to EFI fuse. OK Check and repair harness or connector between battery, EFI fuse and ECM.
DI–128 – DIAGNOSTICS ENGINE 280 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) DTC P1780 Park/Neutral Position Switch Malfunction CIRCUIT DESCRIPTION The park/neutral position switch go on when the shift lever is in the N or P shift position. When it goes on terminal NSW of the ECM is grounded to body ground via the starter relay, thus the terminal NSW voltage becomes 0V. When the shift lever is in the D, 2, L or R position, the park/neutral position switch goes off, so the voltage of ECM. Terminal NSW becomes battery voltage, the voltage of the ECM internal power source. If the shift lever is moved from the N position to the D position, this signal is used for air–fuel ratio correction and for idle speed control (estimated control), etc. DTC No. DTC Detecting Condition Trouble Area 2 or more switches are ON simultaneously for ”N”, ”2”, ”L” and ”R” positions (2 trip detection logic) Sh t i k/ t l iti it h i it P1780 When driving under conditions (a) and (b) for 30 sec. or more the park/neutral position switch is ON (N position): (2 trip detection logic) (a) Vehicle speed: 70 km/h (44 mph) or more (b) Engine speed: 1,500 ∼ 2,500 rpm D Short in park/neutral position switch circuit D Park/neutral position switch D ECM HINT:After confirming DTC P1780 use the LEXUS hand–held tester to confirm the PNP switch signal from ”CURRENT DATA”. DI0A6–01
D00107 C8 C8 C8 II2 ID4 ID4 ID1 Combination Meter ECM Ignition Switch Battery Starter Security ECU E7 E7 E7 L 2 R B+ NSW 14 J29 B B B–W R–B R–B J27 J28 J27 Y O R–B IG3 16 13 J29 D D D 1 10 15 L–W Y J29 E E E Y Y 4 3 8 5 6 2 Park/Neutral Position Switch J24 1H 1V 10 5 5 6 3 11 10 2 J8 J7 C B *1 *1 2J 2B 2D 2K IG2 IF F9 F9 F4 F6 ALT 4 2 W 1K 1K 1B 1J AM1 GAUGE R–L R–B R–B 1 J28 1 R–L R–L R–L A A 1 ST Relay 1 2 1 1 G–B FL MAIN *1: TMC Made → GR, TMM Made → B–O B 1 2 3 11 1 2 3 5 L R 2 6 11 8 C A C R–B O Y F F J26 II2 II2 B–W B–W B–W B B R–B IG3 E10 Instrument Panel J/B Instrument Panel J/B Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Fusible Link Block Engine Room J/B Junction Connector 5 9 – DIAGNOSTICS ENGINE DI–129 281 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) WIRING DIAGRAM
BE3840 D00052 D00042 ON NSW L 2 R Position P,N R D 2 L NSW–Body ground R–Body ground 2–Body ground L–Body ground 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V 0 V 9 ∼ 14 V* 9 ∼ 14 V 9 ∼ 14 V 9 ∼ 14 V 9 ∼ 14 V 9 ∼ 14 V 9 ∼ 14 V* DI–130 – DIAGNOSTICS ENGINE 282 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) INSPECTION PROCEDURE 1 Read PNP, REVERSE, 2ND and LOW signals.
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