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171Chapter 3 Combination Meter SystemSection 1 Circuit Diagram of Combination Meter and Location of
Multi-pin Plug-in TerminalI. CIRCUIT DIAGRAM OF CONBINATION METERSpeed Signal
Ground The Sensor
Revolution SignalWater Temperature SignaFuel Level GaugeTachometer
SpeedometerWater
Temperature Gauge
Feul Level Gauge
OdometerHigh Beam Lamp
Rear Defrost Lamp
Rear Defog Lamp
Backlight
Water Temperature WarningPower Steering
Fuel WarningCharge
Brake Fluid
Oil Pressure
Engine Malfunction
Driver's seat belt
Park Brake
SRS(main)
SRS(sub)
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186Standard:
Result and solution:
Normal:Repair or replace the harness and connector
If abnormal replace the fuel level sensor
6. THE OTHER INDICATORS
Short the ports of the other indicators respectively to the ground or power source in accordance with the
Circuit Diagram, the indicators will light correspondingly. If it dose not light, replace the combination meter.
If it lights, repair or replace the harness or connector.
7. ODOMETER MALFUNCTION
Inspect first supposing the problem to be from the speedometer. If the speedometer is normal, the combina-
tion meter needs replacing when the odometer is abnormal.Condition Standa rd condition
E 110±6Ω
1/2 32.5±3Ω
F3±2Ω
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189II. SPEEDOMETER INSPECTION1. INSPECT THE INDICATING ERROR ALLOWED BY SPEEDOMETER USING A SPEEDOM-
ETER TESTER, AND INSPECT THE OPERATION OF THE ODOMETER.
NOTICE:
Tire over or under inflation will cause the reading error.
2. INSPECT INPUT SIGNAL
(a) Connect the positive (+) pole of the voltmeter to terminal A-11, and the negative (-) to the terminal A-9.
(b) When the vehicle runs at 10 Km/h, inspect the voltage between terminal A-11 and A-9 of the combination
meter.
Standard: 7 wave forms of the high-low electrical level change per second.
NOTICE:
Hold the ignition switch ON when inspected, connect the connector.
3. INSPECT TACHOMETER
Inspect its operation
(1) Start the engine, using a handy tachometer to compare.
(2) The value displayed on the handy tachometer and the value indicated on the tachometer are as follows.Meter indication Value displayed on the tester
20 17—23
40 35—40
60 55—60
80 75—80
100 95—100
120 114—120
140 133—140
160 152—160
180 171—180Analog Meter (Km/h)