Instrument Panel Junction & Relay Blocks
WARNING: This page is about a different car, the 2003 Toyota Highlander and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Numerous junction, relay and fusible link blocks are located in the passenger room. See Figure.
Component Locations
- The heater relay is located behind left side of dash to right of instrument panel junction block, see Figure. For wiring diagram of heater relay circuit components, see AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- The instrument panel junction block is located behind left side of dash. See Figure. Instrument panel junction block contains relays and fuses. See Fig 1. For identification of instrument panel junction block fuse components, see table below. The instrument panel junction block assembly is the connection point for various wiring harnesses. For wiring diagrams of instrument panel junction block circuit components, see appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- The relay block No. 1 is located behind left side of dash next to instrument panel junction block. See Figure. Relay block No. 1 contains relays. See Fig 2. The relay block No. 1 assembly is the connection point for various wiring harnesses. For wiring diagrams of relay block No. 1 circuit components, see appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
INSTRUMENT PANEL JUNCTION BLOCK RELAY IDENTIFICATION
| RELAY NUMBER | RELAY DESCRIPTION |
|---|---|
| A. | Heater Relay |
| B. | Flashr Relay |
| C. | Deicer Relay |
| D. | S-Heater Relay |
| E. | C/Opn Relay |
| F. | Tail Relay |
| G. | Fog Relay |
| H. | ACC Relay |
INSTRUMENT PANEL JUNCTION BLOCK FUSE IDENTIFICATION LEGEND
| Fuse | System | |
|---|---|---|
| 7.5A | IG1 | Automatic Light Control Back-Up Light Cruise Control Door Lock Control Electronically Controlled Transmission and A/T Indicator (1 MZ-FE) Electronically Controlled Transmission and A/T Indicator (2AZ-FE) Front Fog Light Headlight (w/ Daytime Running Light) Headlight (w/o Daytime Running Light) Interior Light Key Reminder and Seat Belt Warning Light Auto Turn Off Mirror Heater and Front Deicer Power Window Seat Heater Theft Deterrent System Trailer Towing Turn Signal and Hazard Warning Light VSC Wireless Door Lock Control |
| 7.5A | IGN | ABS Combination Meter Electronically Controlled Transmission and A/T Indicator (1 MZ-FE) Electronically Controlled Transmission and A/T Indicator (2AZ-FE) Engine Control and Engine Immobiliser System (1 MZ-FE) Engine Control and Engine Immobiliser System (2AZ-FE) SRS VSC |
| 7.5A | OBD | Engine Control and Engine Immobiliser System (1 MZ-FE) Engine Control and Engine Immobiliser System (2AZ-FE) |
| 7.5A | PANEL | Illumination |
| 7.5A | RADIO NO.2 | Air Conditioning (Automatic A/C) Air Conditioning (Manual A/C) Automatic Light Control Door Lock Control Headlight (w/ Daytime Running Light) Headlight (w/o Daytime Running Light) Interior Light Key Reminder and Seat Belt Warning Power Window Radio and Player (6 Speaker) Radio and Player (8 Speaker) |
| 7.5A | RADIO NO.2 | Remote Control Mirror Shift Lock Theft Deterrent System Wireless Door Lock Control |
| 10A | FR FOG | Front Fog Light |
| 10A | TAIL | Front Fog Light Taillight Trailer Towing |
| 15A | CIG | Cigarette Lighter |
| 15A | ECU-IG | ABS Charging Cruise Control Moon Roof Shift Lock Theft Deterrent System VSC |
| 15A | HEATER | Air Conditioning (Automatic A/C) Air Conditioning (Manual A/C) Combination Meter Engine Control and Engine Immobiliser System (1 MZ-FE) Engine Control and Engine Immobiliser System (2AZ-FE) Key Reminder and Seat Belt Warning Radiator Fan and Condenser Fan (1 MZ-FE) Radiator Fan and Condenser Fan (2AZ-FE) Rear Window Defogger SRS |
| 15A | IG2 | Engine Control and Engine Immobiliser System (1 MZ-FE) Engine Control and Engine Immobiliser System (2AZ-FE) Starting and Ignition |
| 15A | PWR OUTLET | Power Outlet |
| 15A | RR WIP | Rear Wiper and Washer |
| 15A | SEAT HTR | Seat Heater |
| 15A | SRS-IG | SRS |
| 20A | D FR DOOR | Door Lock Control Interior Light Power Window Theft Deterrent System Wireless Door Lock Control |
| 20A | D RR DOOR | Power Window |
| 20A | FR DEF | Mirror Heater and Front Deicer |
| 20A | P RR DOOR | Power Window |
| 20A | S/ROOF | Moon Roof |
| 20A | STOP | ABS Cruise Control Electronically Controlled Transmission and A/T Indicator (1MZ-FE) Electronically Controlled Transmission and A/T Indicator (2AZ-FE) Engine Control and Engine Immobiliser System (1MZ-FE) Engine Control and Engine Immobiliser System (2AZ-FE) Shift Lock Stop Light Trailer Towing VSC |
| 20A | WASHER | Front Wiper and Washer Rear Wiper and Washer |
| 25A | P FR DOOR | Interior Light Power Window |
| 25A | WIPER | Front Wiper and Washer |
| 30A | POWER | Power Seat |
| 40A | AM1 | Power Outlet |
RELAY BLOCK NO. 1 RELAY IDENTIFICATION
| RELAY DESCRIPTION |
|---|
| Deicer Relay |
| Seat Heater Relay |
| Circuit Opening Relay |