HO TO USE THIS MNUL This manual provides information on the electrical circuits installed on vehicles by dividing them into a circuit for each system. The actual wiring of each system circuit is shown from the point where the power source is received from the battery as far as each ground point. (ll circuit diagrams are shown with the switches in the OFF position.) hen troubleshooting any problem, first understand the operation of the circuit where the problem was detected (see System Circuit section), the power source supplying power to that circuit (see Power Source section), and the ground points (see Ground Point section). See the System Outline to understand the circuit operation. hen the circuit operation is understood, begin troubleshooting of the problem circuit to isolate the cause. Use Relay Location and Electrical iring Routing sections to find each part, junction block and wiring harness connectors, wiring harness and wiring harness connectors, splice points, and ground points of each system circuit. Internal wiring for each junction block is also provided for better understanding of connection within a junction block. iring related to each system is indicated in each system circuit by arrows (from, to ). hen overall connections are required, see the Overall Electrical iring Diagram at the end of this manual. 00 TOYOT TCOM (ED7U)
HO TO USE THIS MNUL [] STOP LIGHT The system shown here is an EXMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. FROM POER SOURCE SYSTEM (SEE PGE ) [] R STOP,,,, 7.,, GUGE,,,,,, I,,,, I [C] (/G) (S/D) R L @@@@ ÀÀÀÀ 7 C @@@@ ÀÀÀÀ @@@@ ÀÀÀÀ @@@@ ÀÀÀÀ @@@@ ÀÀÀÀ @@@@ ÀÀÀÀ C [G] R L 7 8 G R G 8 R S STOP LIGHT S G G L [D] IE [E] C 7 RER LIGHTS RNING LIGHT [COM. METER] TO S ECU G I (S/D) L [F] Y G [H] L LIGHT FILURE SENSOR DELY CIRCUIT [I] V G R 8 [J] [K] G R G R (SHIELDED) R 7 STOP LIGHT RH [RER COM. LIGHT RH] R STOP LIGHT RH [RER COM. LIGHT LH] [L] H7 HIGH MOUNTED STOP LIGHT V 0 [N] O [M] L 00 TOYOT TCOM (ED7U)
[] : System Title [] : Indicates a Relay lock. No shading is used and only the Relay lock No. is shown to distinguish it from the J/ Example: Indicates Relay lock No. [C] : ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different. [D] : Indicates related system. [E] : Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows ( ). Outside numerals are pin numbers. Female Male ( ) [I] [J] : Indicates the wiring color. ire colors are indicated by an alphabetical code. = lack = hite R = rown L = lue V = Violet S = Sky lue R = Red G = Green LG = Light Green P = Pink Y = Yellow GR = Gray O = Orange The first letter indicates the basic wire color and the second letter indicates the color of the stripe. Example: L Y L (lue) Y (Yellow) : Indicates a wiring Splice Point (Codes are E for the Engine Room, I for the Instrument Panel, and for the ody). The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component s location, e.g, E for the Engine Compartment, I for the Instrument Panel and Surrounding area, and for the ody and Surrounding area. hen more than one code has the first and second letters in common, followed by numbers (e.g, IH, IH), this indicates the same type of wiring harness and wiring harness connector. [F] : Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position. [G] : Junction lock (The number in the circle is the J/ No. and the connector code is shown beside it). Junction locks are shaded to clearly separate them from other parts. Example: C indicates that it is inside Junction lock No. [H] : hen parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ]. The Location of splice Point I is indicated by the shaded section. [K] : Indicates a shielded cable. [L] : Indicates the pin number of the connector. The numbering system is different for female and male connectors. Example: Numbered in order from upper left to lower right Numbered in order from upper right to lower left Female Male [M] : Indicates a ground point. The first letter of the code for each ground point(s) indicates the component s location, e.g, E for the Engine Compartment, I for the Instrument Panel and Surrounding area, and for the ody and Surrounding area. [N] : Page No. 00 TOYOT TCOM (ED7U)
HO TO USE THIS MNUL [O] [P] SYSTEM OUTLINE Current is applied at all times through the STOP fuse to TERMINL of the stop light S. hen the ignition S is turned on, current flows from the GUGE fuse to TERMINL 8 of the light failure sensor, and also flows through the rear lights warning light to TERMINL of the light failure sensor. STOP LIGHT DISCONNECTION RNING hen the ignition S is turned on and the brake pedal is pressed (Stop light S on), if the stop light circuit is open, the current flowing from TERMINL 7 of the light failure sensor to TERMINLS, changes, so the light failure sensor detects the disconnection and the warning circuit of the light failure sensor is activated. s a result, the current flows from TERMINL of the light failure sensor to TERMINL to GROUND and turns the rear lights warning light on. y pressing the brake pedal, the current flowing to TERMINL 8 of the light failure sensor keeps the warning circuit on and holds the warning light on until the ignition S is turned off. SERVICE HINTS S STOP LIGHT S : Closed with the brake pedal depressed L LIGHT FILURE SENSOR,, 7 GROUND : pprox. volts with the stop light S on, 8 GROUND : pprox. volts with the ignition S at ON position GROUND : lways continuity [Q] : PRTS LOCTION Code See Page Code See Page Code See Page C7 L R7 7 H7 R 7 S [R] : RELY LOCKS Code See Page Relay locks (Relay lock Location) 8 R/ No. (Instrument Panel Left) @@@ ÀÀÀ,,, [S] @@@ ÀÀÀ,,, : JUNCTION LOCK ND IRE HRNESS CONNECTOR Code See Page Junction lock and ire Harness (Connector Location) I 0 Instrument Panel ire and Instrument Panel J/ (Lower Finish Panel) C Instrument Panel ire and J/ No. (Instrument Panel Left Side) [T] : CONNECTOR JOINING IRE HRNESS ND IRE HRNESS Code See Page Joining ire Harness and ire Harness (Connector Location) IE Floor ire and Instrument Panel ire (Left Kick Panel) V 0 Luggage Room ire and Floor ire (Luggage Compartment Left) [U] : GROUND POINTS Code See Page Ground Points Location L 0 Under the Left Quarter Pillar O 0 ack Panel Center [V] : SPLICE POINTS Code See Page ire Harness with Splice Points Code See Page ire Harness with Splice Points I Cowl ire 8 0 Luggage Room ire 00 TOYOT TCOM (ED7U)
[O] : Explains the system outline. [P] : Indicates values or explains the function for reference during troubleshooting. [Q] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit. Example : Part L (Light Failure Sensor) is on page of the manual. The letter in the code is from the first letter of the part, and the number indicates its order in parts starting with that letter. Example : L Á Parts is th in order Light Failure Sensor [R] : Indicates the reference page showing the position on the vehicle of Relay lock Connectors in the system circuit. Example : Connector is described on page 8 of this manual and is installed on the left side of the instrument panel. [S] : Indicates the reference page showing the position on the vehicle of J/ and ire Harness in the system circuit. Example : Connector C connects the Instrument Panel ire and J/ No.. It is described on page of this manual, and is installed on the instrument panel left side. [T] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring harness is shown first, followed by the male wiring harness). Example : Connector IE connects the floor wire (female) and Instrument panel wire (male). It is described on page of this manual, and is installed on the left side kick panel. [U] : Indicates the reference page showing the position of the ground points on the vehicle. Example : Ground point O is described on page 0 of this manual and is installed on the back panel center. [V] : Indicates the reference page showing the position of the splice points on the vehicle. Example : Splice point I is on the Cowl ire Harness and is described on page of this manual. 00 TOYOT TCOM (ED7U) 7
HO TO USE THIS MNUL The ground points circuit diagram shows the connections from all major parts to the respective ground points. hen troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between ground points ( E, I and IC shown below) can also be checked this way. I GROUND POINT FN MIN RELY CIGRETTE LIGHTER HETER CONTROL SSEMLY FN MIN RELY E O/D MIN S I HETER SERVO MOTOR MPLIFIER /C FN RELY NO. E CLOCK I LOER S /C FN RELY NO. RDITOR FN MOTOR RETRCT CONTROL RELY RETRCT MOTOR RH RETRCT MOTOR LH FRONT TURN SIGNL LIGHT RH PRKING LIGHT RH FRONT TURN SIGNL LIGHT LH PRKING LIGHT LH DOOR LOCK CONTROL S RH DOOR KEY LOCK S RH DOOR LOCK MOTOR RH DOOR LOCK CONTROL RELY LOER RESISTOR ELECTRICL IDLE UP CUT RELY (M/T) /C MPLIFIER RDIO ND PLYER HETER RELY UTO NTENN MOTOR I 8 I I I 8 R E E R E E E E E E E E R FRONT SIDE MRKER LIGHT RH FRONT SIDE MRKER LIGHT LH RKE FLUID LEVEL RNING S I 0 E E 7 7 C D F G E I I I I I R E ID IC J JUNCTION CONNECTOR I R I I I ( GZE) R I R R PRKING RKE S COMINTION METER HORN S [COM. S] DIMMER S [COM. S] CRUISE CONTROL MIRROR S REMOTE CONTROL MIRROR S TURN SIGNL FLSHER RER INDO DEFOGGER S LIGHT CONTROL S [COM. S] IPER ND SHER S [COM. S] UNLOCK RNING S POER INDO MSTER S POER INDO CONTROL RELY DOOR KEY LOCK S LH DOOR LOCK CONTROL S DOOR LOCK MOTOR LH FUEL CONTROL S OOFER MPLIFIER COMINTION METER COMINTION METER FUEL SENDER I IC The system shown here is an EXMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. 8 00 TOYOT TCOM (ED7U)
The Current Flow Chart section, describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully understood. J POER SOURCE (Current Flow Chart) The chart below shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit reaker, Fuse, etc.) and other parts. Short Pin 0 ECU 7. DOME EFI attery 0 M Starter S Fusible Link lock 0 HZRD 0 RDIO NO. 0 HORN 00 LT 0 S Engine Room R/ (See Page 0) Fuse System 0 0 STOP DOME POER SOURCE S S and Traction Control Cruise Control Electronically Controlled Transmission and /T Indicator Multiplex Communication System Cigarette Lighter and Clock Combination Meter Headlight Interior Light Key Reminder and Seat elt arning Light uto Turn Off Theft Deterrent and Door Lock Control Page 9 87 80 0 0 E. FL MIN 0 DOOR LOCK C L E E 7 E 7 E I I E 7 E 7 O 7. M HZ RDIO INJECTION RELY 0 MIN TTERY R E R 8 M M I I 8 IGNITION S G 7. DOME TIL RELY G R STRTER RELY IG CC IG TIL G E 7 Y 0 DEFOG R Y RD CIG P L The system shown here is an EXMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. 00 TOYOT TCOM (ED7U) 9
HO TO USE THIS MNUL K CONNECTOR LIST I I [] I J J DRK GRY GRY LCK 7 8 DD C C C DD J [] J K K L DRK GRY DD CCCDD L L L M M M GRY LCK [C] 7 8 9 0 78 [D] M N N O O GRY GRY LCK DRK GRY 7 8 9 0 [] : Indicates connector to be connected to a part. (The numeral indicates the pin No.) [] : Junction Connector Indicates a connector which is connected to a short terminal. Same Color Junction Connector Short Terminal Junction connector in this manual include a short terminal which is connected to a number of wire harnesses. lways perform inspection with the short terminal installed. (hen installing the wire harnesses, the harnesses can be connected to any position within the short terminal grouping. ccordingly, in other vehicles, the same position in the short terminal may be connected to a wire harness from a different part.) ire harness sharing the same short terminal grouping have the same color. [C] : Parts Code The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which start with the same letter. [D] : Connector Color Connectors not indicated are milky white in color. 0 00 TOYOT TCOM (ED7U)
L PRT NUMER OF CONNECTORS Code Part Name Part Number Code Part Name Part Number /C mbient Temp. Sensor 90980 070 D Diode (Door Courtesy Light) 90980 08 /C Condenser Fan Motor 90980 7 D Diode (Key Off Operation) 90980 09 /C Condenser Fan Relay 90980 090 D Diode (Luggage Compartment Light) 90980 08 ÁÁ [] /C Triple Pressure S (/C Dual and Single Pressure S) /T Oil Temp. Sensor [] 90980 09 ÁÁ [C] 90980 D 7 D 8 D 9 Door Lock Control Relay Door Courtesy Light LH Door Courtesy Light RH 90980 088 90980 8 7 S ctuator S ctuator 90980 90980 009 D0 D Door Courtesy S LH Door Courtesy S RH 90980 097 8 S Speed Sensor Front LH 90980 09 D Door Courtesy S Front LH 9 0 S Speed Sensor Front RH irbag Sensor Front LH irbag Sensor Front RH 90980 00 90980 8 D D D Door Courtesy S Front RH Door Courtesy S Rear LH Door Courtesy S Rear RH 90980 uto ntenna Motor 90980 9 90980 9 D D7 Door Key Lock and Unlock S LH Door Key Lock and Unlock S RH 90980 70 [] : Part Code [] : Part Name [C] : Part Number Toyota Part Number are indicated. Not all of the above part numbers of the connector are established for the supply. In case of ordering a connector or terminal with wire, please confirm in advance if there is supply for it using Parts Catalog News (published by Parts Engineering dministration Dept.). 00 TOYOT TCOM (ED7U)