Problem Symptoms Tables

HEADLIGHT AND TAILLIGHT SYSTEM (W/O DAYTIME RUNNING LIGHT)

Symptom/Suspect Area

See

Only One Side Headlight Does Not Light

HEAD RH Or LH Fuse (Engine Room R/B)

⁽¹⁾

Headlight Bulb

.....

Wire Harness

.....

"Lo-Beam" Or "Hi-Beam" Does Not Light

Headlight Dimmer Switch

⁽²⁾

Wire Harness

.....

Flash" Does Not Light

Headlight Dimmer Switch

⁽²⁾

Wire Harness

.....

Headlight Does Not Light (Taillight is normal)

Headlight Control Relay (Engine Room R/B)

⁽²⁾

Light Control Switch

⁽²⁾

Headlight Dimmer Switch

⁽¹⁾

HEAD RH And LH Fuse (Engine Room R/B)

⁽²⁾

Wire Harness

.....

Headlight And Taillight Do Not Light

Light Control Switch

⁽²⁾

Wire Harness

.....

Only One Side Taillight Does Not Light

Taillight Bulb

.....

Wire Harness

.....

Taillight Does Not Light (Headlight is normal)

TAIL Fuse (Engine Room R/B)

⁽²⁾

Taillight Control Relay (Engine Room R/B)

⁽²⁾

Light Control Switch)

⁽¹⁾

Wire Harness

.....

Taillight Bulb

.....

⁽¹⁾	HEADLIGHT AND TAILLIGHT SYSTEM

⁽²⁾	INSPECTION

HEADLIGHT AND TAILLIGHT SYSTEM (W/ DAYTIME RUNNING LIGHT)

Symptom/Suspect Area

See

"Lo-Beam" Does Not Light (All); (Daytime Running Light System Is Normal)

Drl Fuse (Engine Room R/B)

⁽¹⁾

No. 4 Daytime Running Light Relay

⁽²⁾

Wire Harness

.....

"Lo-Beam" Does Not Light (All); (Daytime Running Light System Is Not Normal)

Headlight Control Relay (Engine Room R/B)

⁽²⁾

Light Control Switch

⁽²⁾

Daytime Running Light Relay

⁽²⁾

Head (LO LH) And (LO RH) Fuse (Engine Room R/B)

⁽²⁾

Headlight Bulb

.....

Wire Harness

.....

"Lo-Beam" Does Not Light (One Side)

Head (LO LH) Or (LO RH) Fuse (Engine Room R/B)

⁽²⁾

Headlight Bulb

.....

Wire Harness

.....

"Hi-Beam" Does Not Light (All)

Headlight Dimmer Relay (Engine Room R/B)

⁽²⁾

Headlight Dimmer Switch

⁽²⁾

Daytime Running Light Relay

⁽²⁾

Head LH And RH Fuse (Engine Room R/B)

⁽²⁾

Headlight Bulb

.....

Wire Harness

.....

"Hi-Beam" Does Not Light (One Side)

Head LH Or RH Fuse (Engine Room R/B)

⁽²⁾

Headlight Bulb

.....

Wire Harness

.....

"Flash" Does Not Light

Headlight Dimmer Relay (Engine Room R/B)

⁽²⁾

Headlight Dimmer Switch

⁽²⁾

Daytime Running Light Relay

⁽²⁾

Wire Harness

.....

Headlight Does Not Light (Taillight Is Normal)

Headlight Control Relay (Engine Room R/B)

⁽²⁾

Headlight Dimmer Relay (Engine Room R/B)

⁽²⁾

Drl Fuse (Engine Room R/B)

⁽²⁾

Light Control Switch

⁽²⁾

. Daytime Running Light Relay

⁽²⁾

Daytime Running Light No. 4 Relay

⁽²⁾

Wire Harness

.....

Headlight And Taillight Do Not Light

Light Control Switch

⁽²⁾

Wire Harness

.....

Only One Side Taillight Does Not Light

Taillight Bulb

.....

Wire Harness

.....

Taillight Does Not Light (Headlight Is Normal)

Tail Fuse (Engine Room R/B)

⁽²⁾

Taillight Control Relay (Engine Room R/B)

⁽²⁾

Light Control Switch

⁽²⁾

Wire Harness

.....

Taillight Bulb

.....

Daytime Running Light System Does Not Operate

Dome Fuse (Engine Room R/B)

⁽²⁾

Gauge Fuse (Driver Side J/B)

⁽²⁾

IGN Fuse (Driver Side J/B)

⁽²⁾

Daytime Running Light Relay

⁽²⁾

Daytime Running Light Resistor

⁽³⁾

Parking Brake Switch

⁽²⁾

Wire Harness

.....

⁽¹⁾	INSPECTION

⁽²⁾	HEADLIGHT AND TAILLIGHT SYSTEM

⁽³⁾	INSPECTION

TURN SIGNAL AND HAZARD WARNING SYSTEM:

Symptom/Suspect Area

See

"Hazard" And "Turn" Do Not Light

Hazard Warning Switch

⁽¹⁾

Turn Signal Flasher (Driver Side J/B)

⁽¹⁾

Wire Harness

.....

The Flashing Frequency Is Abnormal

Bulb

.....

Turn Signal Flasher (Driver Side J/B)

⁽¹⁾

Wire Harness

.....

Hazard Warning Light Does Not Light (Turn Signal Is Normal

Horn Fuse (Engine Room R/B)

⁽²⁾

Wire Harness

.....

Turn Signal Does Not Light (Combination Meter, Wiper And Washer Do Not Operate)

Ignition Switch

⁽²⁾

Turn Fuse (Driver Side J/B)

⁽¹⁾

Turn Signal Switch

⁽³⁾

Wire Harness

.....

Turn Signal Does Not Light Combination Meter, Wiper And Washer Are Normal)

Turn Fuse (Driver Side J/B)

⁽¹⁾

Turn Signal Switch

⁽²⁾

Wire Harness

.....

Turn Signal Does Not Light In One Direction

Turn Signal Switch

⁽¹⁾

Wire Harness

.....

Only One Bulb Does Not Light

Bulb

.....

Wire Harness

.....

⁽¹⁾	INSPECTION

⁽²⁾

LOCATION

⁽³⁾	INSPECTION

INTERIOR LIGHT SYSTEM

Symptom/Suspect Area

See

Interior Light Does Not Light

Dome Fuse (Engine Room R/B)

⁽¹⁾

Wire Harness

.....

Front Interior Light Does Not Light

Bulb

.....

Door Courtesy Switch

⁽²⁾

Front Interior Light Switch

⁽²⁾

Wire Harness

.....

Rear Interior Light Does Not Light

Bulb

.....

Back Door Courtesy Switch

⁽²⁾

Rear Interior Light Switch

⁽²⁾

Wire Harness

.....

Front Interior Light Remains On

Front Interior Light Switch

⁽²⁾

Door Courtesy Switch

⁽²⁾

Wire Harness

.....

Rear Interior Light Remains On

Rear Interior Light Switch

⁽²⁾

Back Door Courtesy Switch

⁽²⁾

Wire Harness

.....

Personal Light Does Not Light

Bulb

.....

Personal Light Switch

⁽²⁾

Wire Harness

.....

Vanity Light Does Not Light

Bulb

.....

Vanity Light

⁽²⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

BACK-UP LIGHT SYSTEM

Symptom/Suspect Area

See

Back-Up Light Does Not Light

GAUGE Fuse (Driver Side J/B)

.....

Park/Neutral Position Switch (A/T)

⁽¹⁾

Back-up Light Switch (M/T)

⁽²⁾

Bulb

.....

Wire Harness

.....

Back-Up Light Remains On

Park/Neutral Position Switch (A/T)

⁽¹⁾

Back-Up Light Switch (M/T)

⁽²⁾

Wire Harness

.....

Only One Light Does Not Light

Bulb

.....

Wire Harness

.....

⁽¹⁾	DTC P1780: PARK/NEUTRAL POSITION SWITCH

⁽²⁾	INSPECTION

STOP LIGHT SYSTEM

Symptom/Suspect Area

See

Stop Light Does Not Light

Stop Fuse (Engine Room R/B)

⁽¹⁾

Stop Light Switch

⁽²⁾

Bulb

.....

Wire Harness

.....

Stop Light Remains On

Stop Light Switch

⁽²⁾

Wire Harness

.....

Only One Light Does Not Light

Wire Harness

.....

Bulb

.....

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

WIPER AND WASHER SYSTEM

Symptom/Suspect Area

See

Front Wipers Do Not Operate

Wiper Fuse (Driver Side J/B)

⁽¹⁾

Wiper And Washer Switch

⁽¹⁾

Front Wiper Motor

⁽¹⁾

Wire Harness

.....

Front Wipers Do Not Operate In Mist, Int, Lo Or Hi Position

Wiper And Washer Switch

⁽¹⁾

Front Wiper Motor

⁽¹⁾

Wire Harness

.....

Front Washer Motor Does Not Operate

Wiper And Washer Switch

⁽¹⁾

Front Wiper Motor

⁽¹⁾

Wire Harness

.....

Front Wipers Do Not Operate When Washer Switch On

Wiper And Washer Switch

⁽¹⁾

Rear Wiper Does Not Operate

Wiper Fuse (Driver Side J/B)

⁽¹⁾

Rear Wiper Motor

⁽¹⁾

Rear Wiper And Washer Switch

⁽²⁾

Window Limit Switch

⁽²⁾

Back Door Control Relay

⁽¹⁾

Wire Harness

.....

Rear Wiper Does Not Operate In Int Or On Position

Rear Wiper And Washer Switch

⁽¹⁾

Back Door Control Relay

⁽²⁾

Wire Harness

.....

Rear Wiper Does Not Return To Off Position

Rear Wiper Motor

⁽¹⁾

Back Door Control Relay

⁽²⁾

Wire Harness

.....

Rear Washer Motor Does Not Operate

Rear Washer Motor

⁽¹⁾

Rear Wiper And Washer Switch

⁽²⁾

Window Limit Switch

⁽¹⁾

Back Door Control Relay

⁽²⁾

Wire Harness

.....

⁽¹⁾	WIPER/WASHER SYSTEMS

⁽²⁾	BACK DOOR POWER WINDOW CONTROL SYSTEM

COMBINATION METER

Symptom/Suspect Area

See

Tachometer, Speedometer, Engine Coolant Temperature Gauge And Fuel Gauge Do Not Operate

GAUGE Fuse (Driver Side J/B)

⁽¹⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Speedometer Does Not Operate

Skid Control ECU

⁽³⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Tachometer Does Not Operate

ECM

.....

Meter Circuit

⁽²⁾

Wire Harness

.....

Fuel Gauge Does Not Operate Or Operates Abnormally

Fuel Receiver Gauge

⁽⁴⁾

Fuel Sender Gauge

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Engine Coolant Temperature Gauge Does Not Operate Or Operates Abnormally

Engine Coolant Temperature Receiver Gauge

⁽⁴⁾

Engine Coolant Temperature Sender Gauge

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

All Illumination Lights Do Not Light

TAIL Fuse (Engine Room R/B)

⁽¹⁾

Taillight Control Relay

⁽⁵⁾

Light Control Rheostat

⁽⁴⁾

Wire Harness

.....

Only One Illumination Light Does Not Light

Bulb

.....

Meter Circuit

⁽²⁾

Warning Lights Do Not Light Up (Except Discharge, SRS And Door Open)

GAUGE Fuse (Driver Side J/B)

⁽¹⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Brake Warning Light Does Not Light

Bulb

.....

Brake Fluid Level Switch

⁽⁴⁾

Parking Brake Switch

⁽⁴⁾

Bulb Check Relay

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

ATF Temperature Warning Light Does Not Light

Bulb

.....

ATF Temperature Sensor

⁽⁶⁾

ECM

.....

Meter Circuit

⁽²⁾

Wire Harness

.....

Door Open Warning Light Does Not Light

Bulb

.....

Door Courtesy Switch

⁽⁴⁾

Back Door Courtesy Switch

⁽⁷⁾

DOME Fuse (Engine Room R/B)

⁽¹⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

SRS Warning Light Does Not Light

Bulb

.....

AIRBAG Sensor Assembly

.....

ECU-B Fuse (Driver Side J/B)

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Discharge Warning Light Does Not Light

Bulb

.....

IGN Fuse (Driver Side J/B)

⁽⁴⁾

Generator

.....

Meter Circuit

⁽²⁾

Wire Harness

.....

Seat Belt Warning Light Does Not Light

Bulb

.....

Buckle Switch

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

ABS Warning Light Does Not Light

Bulb

.....

Skid Control ECU

⁽⁸⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Low Oil Pressure Warning Light Does Not Light

Bulb

.....

Low Oil Pressure Warning Switch

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Fuel Level Warning Light Does Not Light

Bulb

.....

Meter Circuit

⁽²⁾

Wire Harness

.....

Unengaged "Park" Warning Light Does Not Light

Bulb

.....

Park/Neutral Position Switch

⁽⁹⁾

Transfer Neutral Position Switch

⁽¹⁰⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Turn Indicator Light Does Not Light

Bulb

.....

Turn Signal And Hazard Warning System

⁽¹¹⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

High Beam Indicator Light Does Not Light

Bulb

.....

Headlight And Taillight System

⁽⁵⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

A/T PWR Indicator Light Does Not Light

Bulb

.....

A/T Pattern Select Switch

⁽¹²⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

4WD Indicator Light Does Not Light

Bulb

.....

A.D.D. Switch

⁽¹³⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Washer Level Indicator Light Does Not Light

Bulb

.....

Window Washer Level Warning Switch

⁽⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

O/D Off Indicator Light Does Not Light

Bulb

.....

O/D Main Switch

⁽¹⁴⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Malfunction Indicator Light Does Not Light

Bulb

.....

ECM

⁽¹⁵⁾

Wire Harness

.....

Cruise Control Indicator Light Does Not Light

Bulb

.....

ECM

⁽¹⁶⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

Rear DIFF. Lock Indicator Light Does Not Light

Bulb

.....

DIFF. Lock Indicator Switch

⁽¹⁷⁾

Meter Circuit

⁽²⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾

CIRCUIT

⁽³⁾	A.D.D. CONTROL SYSTEM

⁽⁴⁾	INSPECTION

⁽⁵⁾	INSPECTION

⁽⁶⁾	DTC P0710: ATF TEMPERATURE SENSOR

⁽⁷⁾	INSPECTION

⁽⁸⁾	DTCS C0200/ 31, C0205/ 32, C0210/ 33 & C0215/

⁽⁹⁾	DTC P1780: PARK/NEUTRAL POSITION SWITCH

⁽¹⁰⁾	TRANSFER NEUTRAL POSITION SWITCH and P1783: TRANSFER NEUTRAL POSITION SWITCH MALFUNCTION

⁽¹¹⁾	INSPECTION

⁽¹²⁾	PATTERN SELECT SWITCH (TACOMA & 4Runner

⁽¹³⁾	INSPECTION

⁽¹⁴⁾	O/D MAIN SWITCH

⁽¹⁵⁾	RETRIEVING DIAGNOSTIC TROUBLE CODES

⁽¹⁶⁾

PRE-CHECK

⁽¹⁷⁾	INSPECTION

DEFOGGER SYSTEM

Symptom/Suspect Area

See

Defogger system does not operate

GAUGE Fuse (Driver Side J/B)

⁽¹⁾

DEFOG Fuse (Engine Room R/B)

⁽¹⁾

Defogger Switch

⁽²⁾

Defogger Relay

⁽²⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

POWER WINDOW CONTROL SYSTEM

Symptom/Suspect Area

See

Power Window Does Not Operate (All) (Power Door Lock Does Not Operate)

POWER Fuse (Driver Side J/B)

⁽¹⁾

Combination Meter

⁽²⁾

Wire Harness

.....

Power Window Does Not Operate (All) (Power Door Lock Is Normal)

Ignition Switch

⁽³⁾

Power Main Relay (Driver Side J/B)

⁽⁴⁾

Power Window Master Switch

⁽⁴⁾

Wire Harness

.....

"One Touch Power Window System" Does Not Operate

Power Window Master Switch

⁽⁴⁾

Only One Window Glass Does Not Operate

Power Window Master Switch

⁽⁴⁾

Power Window Switch

⁽⁴⁾

Power Window Motor

⁽⁴⁾

Wire Harness

.....

"Window Lock Illumination" does not light

Power Window Master Switch

⁽⁴⁾

"Window Lock System" Does Not Operate

Power Window Master Switch

⁽⁴⁾

"Key-Off Power Window" Does Not Operate

Combination meter

⁽²⁾

Ignition Switch

⁽³⁾

Door Courtesy Switch

⁽⁵⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

⁽³⁾	INSPECTION

⁽⁴⁾	INSPECTION

⁽⁵⁾	INSPECTION

BACK DOOR POWER WINDOW SYSTEM

Symptom/Suspect Area

See

Back Door Power Window Does Not Operate

POWER Fuse (Driver Side J/B)

⁽¹⁾

Window Limit Switch

⁽²⁾

Rear Wiper Motor

⁽³⁾

Back Door Power Window Switch

⁽¹⁾

Back Door Control Switch

⁽¹⁾

W/O Power Window: Back Door Window Lock Switch

⁽¹⁾

W/ Power Window: Power Window Master Switch

⁽¹⁾

Back Door Power Window Motor

⁽¹⁾

Back Door Control Relay

⁽¹⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾	LOCATION and INSPECTION

⁽³⁾	INSPECTION

POWER DOOR LOCK CONTROL SYSTEM

Symptom/Suspect Area

See

Power Doorlock Control System Does Not Operate (All)

Power Fuse (Driver Side J/B)

⁽¹⁾

Power Source Circuit (Terminal PWR)

⁽¹⁾

Body ECU

.....

Power Doorlock Control System Can Not Be Operated By Door Lock Control Switch Or Back Door Lock Switch

W/ Power Window: Door Lock Control Switch

⁽²⁾

W/O Power Window: Back Door Lock Switch

⁽²⁾

Integration Relay (Driver Side J/B)

⁽²⁾

Wire Harness

.....

Power Doorlock Control System Can Not Be Operated By Door Key

Door Key Lock And Unlock Switch

⁽²⁾

Back Door Control Switch

⁽²⁾

Wire Harness

.....

Body ECU

⁽²⁾

Only One Door Does Not Operate

Door Lock Motor

⁽²⁾

Door Lock Link Disconnected

.....

Wire Harness

.....

Fault In Key Confine Prevention Operation

Key Unlock Warning Switch

⁽³⁾

Door Courtesy Switch

⁽⁴⁾

Wire Harness

.....

Body ECU

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

⁽³⁾	IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH

⁽⁴⁾	INSPECTION

SLIDING ROOF SYSTEM

Symptom/Suspect Area

See

Sliding Roof System Does Not Operate

Power Fuse (Driver Side J/B)

⁽¹⁾

Power Main Relay (Driver Side J/B)

⁽²⁾

Sliding Roof Control Switch With Relay

⁽³⁾

Sliding Roof Motor

⁽³⁾

Wire Harness

.....

Sliding Roof System Operates Abnormally

Limit Switch

⁽³⁾

Sliding Roof Control Switch With Relay

⁽³⁾

Sliding Roof System Stops Operation Half Way

Sliding Roof Control Switch With Relay

⁽³⁾

Limit Switch

⁽³⁾

Sliding Roof Motor (Stones Or Foreign Material Trapped In Motor Assembly)

⁽³⁾

⁽¹⁾	INSPECTION

⁽²⁾	INSPECTION

⁽³⁾	INSPECTION

POWER SEAT CONTROL SYSTEM

Symptom/Suspect Area

See

Power Seat Does Not Operate

Power Fuse (Driver Side J/B)

⁽¹⁾

Power Seat Switch

⁽²⁾

Wire Harness

.....

"Sliding Operation" Does Not Operate

Slide Motor

⁽²⁾

Power Seat Switch

⁽²⁾

Wire Harness

.....

"Reclining Operation" Does Not Operate

Reclining Motor

⁽²⁾

Power Seat Switch

⁽²⁾

Wire Harness

.....

"Rear Vertical Operation" Does Not Operate

Rear Vertical Motor

⁽²⁾

Power Seat Switch

⁽²⁾

Wire Harness

.....

"Lumbar Support Operation" Does Not Operate

Lumbar Support Motor

⁽²⁾

Lumbar Support Switch

⁽²⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

POWER MIRROR SYSTEM

Symptom/Suspect Area

See

Power Mirror System Does Not Operate

ACC Fuse (Driver Side J/B)

⁽¹⁾

Mirror Control Switch

⁽²⁾

Mirror Motor

⁽²⁾

Wire Harness

.....

Power Mirror Operates Abnormally

Mirror Control Switch

⁽²⁾

Mirror Motor

⁽²⁾

Wire Harness

.....

⁽¹⁾

LOCATION

⁽²⁾	INSPECTION

SEAT HEATER SYSTEM

Symptom/Suspect Area

See

Driver's seat heater does not operate

SEAT HTR Fuse

⁽¹⁾

Seat Heater Switch (D, P)

⁽²⁾

Seat Heater

⁽²⁾

Wire Harness

.....

Passenger's Seat Heater Does Not Operate

SEAT HTR Fuse

⁽¹⁾

Seat Heater Switch (D, P)

⁽²⁾

Seat Heater

⁽²⁾

Wire Harness

.....

Seat Heater Temperature Is Too Hot

Seat Heater

⁽²⁾

⁽¹⁾	FUSES & CIRCUIT BREAKERS

⁽²⁾	INSPECTION

GARAGE DOOR OPENER SYSTEM

Symptom/Suspect Area

See

Equipment Of Which Code Has Been Registered Does Not Operate

Garage Door Opener

⁽¹⁾

Wire Harness

.....

See Footnote

⁽²⁾

LED Does Not Light (Even Though One Switch Is Pressed)

Garage Door Opener

⁽¹⁾

Wire Harness

.....

LED Does Not Light (Only One Switch Is Pressed)

Garage Door Opener

⁽¹⁾

⁽¹⁾	INSPECTION

⁽²⁾	AS THE GARAGE DOOR OPENER ON THE VEHICLE SIDE SEEMS TO BE NORMAL, CHECK THE OPENER, OF WHICH CODE HAS BEEN REGISTERED. ON THE EQUIPMENT SIDE.