Yes
Step 8
Diagnostic completed.
5. Repair Instructions:
Replace the Pre-Catalytic oxygen sensor. Refer to
Pre-Catalytic Oxygen Sensor Replacement
2.2.7.16 DTC P0036 P0037 P0038 P0054
1. DTC Descriptor:
DTC
P0036
Post-Catalytic Oxygen Sensor Heating Control Circuit Open
DTC
P0037
Post-Catalytic Oxygen Sensor Heating Control Circuit Short to Ground
DTC
P0038
Post-Catalytic Oxygen Sensor Heating Control Circuit Short to Power Supply
DTC
P0054
Post-Catalytic Oxygen Sensor Heating Resistance Unreasonable
The Post-Catalytic heated oxygen sensor (HO
2
S) is used for monitoring three-way catalytic converter working status. The sensor
compares the oxygen content in ambient air with the oxygen content in exhaust flow. Each heated oxygen sensor has an internal
heating element for sensor heating. ECM controls the heated oxygen sensor heating control circuit. This makes the system enter
into the closed-loop control mode earlier, so that ECM can calculate Air-Fuel ratio earlier. ECM commands heater control module
switched on or off, so that heated oxygen sensor works within the specified working temperature range. Engine control module
detects the temperature by Measure the heater current.
The Post-Catalytic heated oxygen sensor heating coil voltage is provided by The Main Relay, which is controlled by ECM. When
the ignition switch is turned to "ON" position, the Post-Catalytic oxygen sensor harness connector EN03 terminal No.1 voltage is
provided by the battery. ECM controls heater working time through ECM harness connector EN01 terminal No.4.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection
Strategy
Conditions For Setting The DTC (Control Strategy)
Fault Locations
P0036
P0037
P0038
Hardware Circuit
Checks
1. Circuit Open
2. Circuit Short to Ground
3. Circuit Short to Power Supply
1. Sensor Circuit
2. Sensor
3. ECM
P0054
The current resistance
is greater than the set
value.
1. The oxygen sensor current internal resistance is greater
than 1700 Ω.
2. The current exhaust gas temperature is between 200°C
(392 ºF) and 550°C (1,022 ºF).
Engine
Control System JL4G18-D
2-83
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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