System Tests: Notes

Affected Component	System Test
Speedometer	Speedometer
Speed Sensor Circuit
Tachometer	Tachometer
Igniter Signal Circuit
Fuel Gauge	Fuel Gauge
(1) Fuel Gauge Sending Unit
Wiring Harness
(2) Instrument Cluster
Coolant Gauge	Coolant Gauge
(1) Engine Coolant Temperature Sending Unit
Wiring Harness
(2) Instrument Cluster
(1) See FUEL GAUGE SENDING UNIT  or ENGINE COOLANT TEMPERATURE SENDING UNIT  under COMPONENT TESTS. (2) See PIN VOLTAGE TESTS .

Affected Indicator	System Test
Shift	Bulb Circuit
(1) A/T Shift Indicator Light Switch
(1) Transmission Control Switch
Open Door	Bulb Circuit
(2) Door Courtesy Switch
Driver's Seat Belt Warning	Bulb Circuit
(2) Driver's Belt Warning Switch Circuit
(3) Instrument Cluster Circuit Plate
Wiring Harness
(4) BCM No. 2
Passenger's Seat Belt Warning	(2) Clock/Seat Belt
Warning Light
(2) Seat Belt Warning Switch
(2) Occupant Detection Sensor
(3) Instrument Cluster Circuit Plate
Wire Harness
(4) BCM No. 1
Oil Pressure	Bulb Circuit
(2) Oil Pressure Switch
Charge	Bulb Circuit
Go to STARTING & CHARGING SYSTEMS
Brake	Bulb Circuit
(2) Parking Brake Switch
(2) Brake Fluid Level switch
(3) Instrument Cluster
Headlight (USA Only)	Bulb Circuit
(6) Headlight & Taillight System
(3) Instrument Cluster
Taillight (Canada Only)	Bulb Circuit
(6) Headlight & Taillight System
(3) Instrument Cluster
CRUISE MAIN	Bulb Circuit
(7) Cruise Control Switch
(3) Instrument Cluster
ECT SNOW	Bulb Circuit
(1) ECT Pattern Indicator Signal
VSC OFF	Bulb Circuit
(5) ABS, TRAC & VSC ECU
(3) Instrument Cluster
Washer Level	Bulb Circuit
(2) Washer Level Switch
(3) Instrument Cluster
Rear Lights	Bulb Circuit
(2) Light Failure Sensor
(3) Instrument Cluster
Oil Level	Bulb Circuit
(2) Oil Level Switch
(3) Instrument Cluster
Any Lights	Bulb Circuit
Instrument Cluster ECU
Power Source Circuit
(2) Instrument Cluster
(1) See appropriate AUTOMATIC TRANSMISSION article. (2) See appropriate test under COMPONENT TESTS . (3) See PIN VOLTAGE TESTS . (4) See appropriate BODY CONTROL COMPUTERS article. (5) See ANTI-LOCK BRAKES wiring diagram in SYSTEM WIRING DIAGRAMS article in the WIRING DIAGRAMS section. (6) See HEADLIGHT SYSTEMS or DAYTIME RUNNING LIGHTS wiring diagrams in SYSTEM WIRING DIAGRAMS article in the WIRING DIAGRAMS section.. (7) See appropriate CRUISE CONTROL SYSTEMS article in this section.