SsangYong Musso. Manual — part 149
1F-180 ENGINE CONTROLS
SSANGYONG Y158
DIAGNOSTIC TROUBLE CODE (DTC) P0141-95
O2 BANK 1 SENSOR 2 HEATER SHORT CIRCUIT TO
GROUND OR OPEN
Circuit Description
In order to control emissions, a catalytic converter is
used to convert harmful emissions into harmless water
vapor and carbon dioxide.
The Engine Control Module (ECM) has the ability to
monitor this process by using a Heated Oxygen Sensor
(O2S 2). The O2S 2 produces an output signal which
indicates the storage capacity of the catalyst. This in
turn indicates the catalyst’s ability to convert exhaust
emissions effectively.
If the O2S 2 pigtail wiring, connector, or terminal is
damaged, the entire O2S 2 assembly must be replaced.
Do not attempt to repair the wiring, connector, or
terminals. In order for the sensor to function properly, it
must have a clean air reference provided to it. This clean
air reference is obtained by way of the O2S 2 wire(s).
Any attempt to repair the wires, connector, or terminal
and degrade the O2S 2 performance.
Conditions for Setting the DTC
•••••
O2S 2 voltage is less than 2 volts for ground.
•••••
O2S 2 voltage is less than 3 volts for open.
•••••
Output stage is inactive.
Action Taken When the DTC Sets
•••••
The Malfunction Indicator Lamp (MIL) will illuminate
after two consecutive driving cycles in which the diag-
nostic runs with the fault active.
•••••
The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.
•••••
A history DTC is stored.
Conditions for Clearing the MIL/DTC
•••••
The MIL will turn off after three consecutive driving
cycles in which the diagnostic runs without a fault.
•••••
A history DTC will clear after 40 consecutive warm-
up cycles without a fault.
•••••
The DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
Check for the following conditions:
An intermittent may be caused by rubbed-through wire
insulation or a wire contacting the exhaust.
Check for a poor connection or a damaged harness and
inspect the harness connectors for the following condi-
tions:
•••••
improper mating
•••••
Broken locks
•••••
Improperly formed
•••••
Damaged terminals
•••••
Poor terminal-to-wire connection
•••••
Damaged harness
YAB1F140
ENGINE CONTROLS 1F-181
SSANGYONG Y158
1
Step
Action
Value(s)
Yes
No
DTC P0141-95 O2 Bank 1 Sensor 2 Heater Short Circuit to Ground or Open
-
Go to Step 2
Go to “Euro
On-Board
Diagnostic
System Check”
2
3
4
-
Go to Step 10
Go to Step 6
-
Go to Step 10
Go to Step 7
-
Go to Step 10
-
5
6
7
8
Perform an Euro On-Board Diagnostic (EOBD) System
Check.
Is the system check complete?
1. Turn the ignition ON, with the engine OFF.
2. Install a scan tool.
3. Operate the vehicle within the Freeze Frame
Conditions for Setting the DTC as noted.
Does the heater ampere within the specified value?
1. Turn the ignition OFF.
2. Disconnect the O2S 2 electrical connector.
3. Turn the ignition ON.
4. With a test light connected to B+, probe the O2S 2
electrical connector, terminal 3.
Does the test light illuminate?
1. Check an open or short to ground in wiring between
the Over Voltage Protection Relay (OVPR) electrical
connector, terminal 2 and O2S 2 electrical
connector, terminal 3.
2. Repair as necessary.
Is the repair complete?
Check the poor connection at the OVPR connector
terminal 2 and O2S 2 electrical connector, terminal 3.
Did the terminal require replacement?
1. Check an open or short to ground in wiring between
the O2S 2 electrical connector, terminal 4 and O2S 2
ground circuit, terminal 7.
2. Repair as necessary.
Is the repair complete?
Check the poor connection at the O2S 2 connector
terminal 4 and O2S 2 ground circuit, terminal 7.
Did the terminal require replacement?
Replace the O2S 2.
Is the repair complete?
1. Turn the ignition switch OFF.
2. Replace the ECM.
Is the repair complete?
-
Go to Step 10
Go to Step 5
-
Go to Step 10
Go to Step 9
-
Go to Step 10
-
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Table.
1. The Euro On-Board Diagnostic (EOBD) System
Check prompts the technician to complete some
basic checks and store the freeze frame and failure
records data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.
4. This step checks for an open or shorted.
-
Go to Step 4
Go to
“Diagnostic
Aids”
9
0.2 - 2.0 amps
Go to Step 3
Go to Step 8
1F-182 ENGINE CONTROLS
SSANGYONG Y158
10
Step
Action
Value(s)
Yes
No
11
1. Using the scan tool, clear the Diagnostic Trouble
Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for setting
this DTC as specified in the supporting text.
Does the scan tool indicate that this diagnostic has ran
and passed?
Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?
-
Go to Step 11
Go to Step 2
DTC P0141-95 O2 Bank 1 Sensor 2 Heater Short Circuit to Ground or Open (Cont'd)
-
Go to
applicable
DTC table
System OK
ENGINE CONTROLS 1F-183
SSANGYONG Y158
BLANK
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст