System Operation Check

Trouble shooting of instrument panel system complaint begins with verification of the customer problem. If problem occurs, go to step 3. If problem does not occur, go to next step.
If problem does not occur, review conditions under which problem occurred for customer and try to duplicate those conditions. For example, if the problem occurs on rainy days or during high humidity conditions, sprinkle water onto vehicle and see if malfunction occurs. DO NOT sprinkle water directly into engine compartment or onto electronic components. Visually inspect for signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary. If problem still cannot be created, go to next step.

Determine the problem symptom. See PROBLEM SYMPTOM INDEX table.

PROBLEM SYMPTOM INDEX

Symptom

Suspected Area ⁽¹⁾

Indicator Lights

O/D OFF Indicator Light Does Not Light Up

⁽²⁾⁽³⁾⁽⁴⁾⁽⁵⁾

Cruise Control Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾

High Beam Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽⁵⁾⁽⁷⁾

Turn Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽⁵⁾⁽⁸⁾

Shift Indicator Lights Do Not Light Up

⁽²⁾⁽⁴⁾⁽⁹⁾⁽⁵⁾

Only One Shift Indicator Does Not Light Up

⁽²⁾⁽⁴⁾

Malfunction Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾

ECT PWR Indicator Light Does Not Light Up

⁽²⁾⁽¹⁰⁾⁽⁴⁾⁽⁵⁾⁽¹¹⁾

2nd Start ETCS Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾

Rear Differential Lock Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽¹²⁾⁽⁵⁾

Center Differential Lock Indicator Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽¹³⁾⁽⁵⁾

Indicator Lights Do Not Light Up (Except Turn, Hi-Beam & Security)

⁽¹⁴⁾⁽⁵⁾

Meter Gauges & Illumination

Tachometer, Fuel Gauge & Engine Coolant Temperature Gauge Do Not Operate

⁽¹⁴⁾⁽⁴⁾⁽⁵⁾

Speedometer Does Not Operate

⁽¹⁵⁾⁽¹⁶⁾⁽⁴⁾⁽⁵⁾

Tachometer Does Not Operate

⁽¹⁷⁾⁽¹⁸⁾⁽⁴⁾⁽⁵⁾

Fuel Gauge Does Not Operate Or Abnormal Operation

⁽¹⁹⁾⁽²⁰⁾⁽⁴⁾⁽⁵⁾

Oil Pressure Gauge Does Not Operate

⁽²¹⁾⁽²²⁾⁽⁴⁾⁽⁵⁾

Voltmeter Does Not Operate

⁽²³⁾⁽⁴⁾⁽⁵⁾

Engine Coolant/Water Temperature Gauge Does Not Operate Or Abnormal Operation

⁽²⁴⁾⁽²⁵⁾⁽⁴⁾⁽⁵⁾

All Illumination Lights Do Not Light Up

⁽²⁶⁾⁽⁵⁾

Brightness Does Not Change Even When Rheostat Is Turned

⁽²⁾⁽⁵⁾

Only One Illumination Light Does Not Light Up

⁽²⁾⁽⁵⁾

Warning Lights

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

⁽¹⁴⁾⁽⁴⁾⁽⁵⁾

Fuel Level Warning Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽²⁰⁾⁽⁵⁾

ABS Warning Light Does Not Light Up

⁽²⁾⁽²⁷⁾⁽⁵⁾

Seat Belt Warning Light Does Not Light Up

⁽²⁾⁽²⁸⁾⁽⁵⁾⁽²⁹⁾

Discharge Warning Light Does Not Light Up

⁽³⁰⁾⁽²⁾⁽⁵⁾⁽³¹⁾

Brake Warning Light Does Not Light Up

⁽²⁾⁽³²⁾⁽³³⁾⁽⁴⁾⁽⁵⁾

SRS Warning Light Does Not Light Up

⁽³⁴⁾⁽²⁾⁽³⁵⁾⁽⁴⁾⁽⁵⁾

Open Door Warning Light Does Not Light Up

⁽³⁶⁾⁽²⁾⁽³⁷⁾⁽⁴⁾⁽⁵⁾

A/T Oil Temperature Warning Light Does Not Light Up

⁽²⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾

Washer Level Warning Light Does Not Light Up

⁽²⁾⁽³⁸⁾⁽⁴⁾⁽⁵⁾

⁽¹⁾	Perform test procedures in order listed under suspected area.

⁽²⁾	Check the bulb.

⁽³⁾	Check the O/D OFF switch. See O/D MAIN SWITCH & O/D INDICATOR LIGHT CIRCUIT under CIRCUIT TESTS in DIAGNOSIS - A-343F article under AUTOMATIC TRANSMISSION in TRANSAXLE/TRANSMISSION.

⁽⁴⁾	Check the meter circuit plate. See COMBINATION METER CIRCUIT under CIRCUIT TESTS.

⁽⁵⁾	Check the wire harness.

⁽⁶⁾	Check the engine control module (ECM).

⁽⁷⁾	Check the headlight system. See AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS article under HEADLIGHTS in ACCESSORIES & EQUIPMENT.

⁽⁸⁾	Check the turn signal and hazard warning system. See STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.

⁽⁹⁾	Check the park/neutral position switch. See DTC P1780: PARK/NEUTRAL POSITION SWITCH under DIAGNOSTIC TESTS in DIAGNOSIS - A-343F article under AUTOMATIC TRANSMISSION in TRANSAXLE/TRANSMISSION.

⁽¹⁰⁾	Check the electronically controlled transmission (ECT) pattern select switch. See DIAGNOSIS - A-343F article under AUTOMATIC TRANSMISSION in TRANSAXLE/TRANSMISSION.

⁽¹¹⁾	Check the electronically controlled transmission (ECT) system. See DIAGNOSIS - A-343F article under AUTOMATIC TRANSMISSION in TRANSAXLE/TRANSMISSION.

⁽¹²⁾	Check the rear differential lock detection switch. See ANTI-LOCK/VEHICLE SKID CONTROL - LX470 article in BRAKES.

⁽¹³⁾	Check the transfer 4WD position detection switch. See DIAGNOSIS - HF2A & W/A343F article under TRANSFER CASE in TRANSAXLE/TRANSMISSION.

⁽¹⁴⁾	Check the GAUGE fuse located in the LH cowl side junction block behind the left kick panel.

⁽¹⁵⁾	Check the speedometer. See SPEEDOMETER under COMPONENT TESTS.

⁽¹⁶⁾	Check the speed sensor. See DTC P0500: VEHICLE SPEED SENSOR CIRCUIT under DIAGNOSTIC TESTS under SELF-DIAGNOSTICS - LX470 article under FAULT ISOLATION in ENGINE PERFORMANCE.

⁽¹⁷⁾	Check the tachometer. See TACHOMETER under COMPONENT TESTS.

⁽¹⁸⁾	Check the igniter. See SPARK TEST under IGNITION CHECKS under BASIC DIAGNOSTIC PROCEDURES article under FAULT ISOLATION in ENGINE PERFORMANCE.

⁽¹⁹⁾	Check the fuel receiver gauge. See FUEL RECEIVER GAUGE under COMPONENT TESTS.

⁽²⁰⁾	Check the fuel sender gauge. See FUEL SENDER GAUGE under COMPONENT TESTS.

⁽²¹⁾	Check the oil pressure receiver gauge. See OIL PRESSURE RECEIVER GAUGE under COMPONENT TESTS.

⁽²²⁾	Check the oil pressure sender gauge. See OIL PRESSURE SENDER GAUGE under COMPONENT TESTS.

⁽²³⁾	Check the voltmeter. See VOLTMETER under COMPONENT TESTS.

⁽²⁴⁾	Check the coolant/water temperature receiver gauge. See ENGINE COOLANT TEMPERATURE RECEIVER GAUGE under COMPONENT TESTS.

⁽²⁵⁾	Check the coolant/water temperature sender gauge. See ENGINE COOLANT TEMPERATURE SENDER GAUGE under COMPONENT TESTS.

⁽²⁶⁾	Check the light control rheostat. See LIGHT CONTROL RHEOSTAT under COMPONENT TESTS.

⁽²⁷⁾	Check the ABS ECU. See ANTI-LOCK/VEHICLE SKID CONTROL - LX470 article in BRAKES.

⁽²⁸⁾	Check the seat belt buckle switch. See SEAT BELT BUCKLE SWITCH under COMPONENT TESTS.

⁽²⁹⁾	Check the body ECU. See BODY CONTROL SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽³⁰⁾	Check the IGN fuse located in the LH cowl side junction block behind the left kick panel.

⁽³¹⁾	Check the generator. See appropriate GENERATORS & REGULATORS article under CHARGING SYSTEM in ELECTRICAL.

⁽³²⁾	Check the parking brake switch. See PARKING BRAKE SWITCH under COMPONENT TESTS.

⁽³³⁾	Check the brake fluid level warning switch. See BRAKE FLUID LEVEL WARNING SWITCH under COMPONENT TESTS.

⁽³⁴⁾	Check the ECU-B fuse located in the LH cowl side junction block behind the left kick panel.

⁽³⁵⁾	Check the air bag sensor assembly. See AIR BAG RESTRAINT SYSTEMS article in RESTRAINTS.

⁽³⁶⁾	Check the DOME fuse located in the LH cowl side junction block behind the left kick panel.

⁽³⁷⁾	Check the door courtesy switch. See AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS article under HEADLIGHTS in ACCESSORIES & EQUIPMENT.

⁽³⁸⁾	Check the washer fluid level warning switch. See WINDOW WASHER LEVEL WARNING SWITCH under COMPONENT TESTS.

After repairs have been completed, confirm that problem has been eliminated. Operate the system under same conditions recorded for original complaint. If problem is no longer present, repair has corrected problem. If problem is still present, further diagnosis and repair is required.