3. Schematic:
12
13
D
C
A
B
Main Relay
From Battery
Pre-catalytic Oxygen Sensor
Engine
Control
Module
FE02-5205b
4. Diagnostic Steps:
Step 1
Connect scan tool.
Next
Step 2
Start engine and turn on the scan tool.
Next
Step 3
Maintain the engine speed at 2,500 rpm for more than 2 min to warm up the engine, until the engine coolant
temperature reaches 0°C (176 ºF).
Next
Step 4
Select on the scan tool: Engine / read data stream / group 1 oxygen sensor voltage 1 (Pre-Catalytic oxygen
sensors).
Next
Step 5
Observe oxygen sensor output voltage, which should fluctuate within 0.1-0.8 V.
2-672
Control System JL4G15-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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