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SsangYong Musso. Manual - part 198

1F-376 ENGINE CONTROLS

SSANGYONG Y158

Step

Action

Value(s)

Yes

DTC P0445 Purge Valve Short Circuit to Battery (Cont’d)

Go to Step 13

Go to Step 9

Go to Step 13

1. Turn the ignition OFF.
2. Disconnect the ECM connector (black).
3. With the test light connected to ground, probe the

ignition feed circuit, terminal 34 in the ECM harness
connector.

Does the test light illuminate?
Check the valve control circuit at terminals 34 for a short
to battery and repair as necessary.
Is the repair complete?
Check the connections at the valve and repair as
necessary.
Is the repair complete?
Check the connections at the ECM and repair as
necessary.
Is the repair complete?
Repair the faulty ignition feed circuit.
Is the repair complete?
1. Turn the ignition OFF.
2. Replace the valve.
Is the repair complete?
1. Turn the ignition OFF.
2. Replace the ECM.
Is the repair complete?
1. Using the scan tool, clear the DTCs.
2. Start the engine and idle at normal operating

temperature.

3. Operate the vehicle within the conditions for setting

this DTC as supported in the text.

Does the scan tool indicate that this diagnostic ran
passed?
Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?

Go to Step 13

Go to Step 12

Go to Step 13

Go to Step 11

Go to Step 13

Go to Step 14

Go to Step 2

Go to Step 7

Go to

applicable

DTC table

System OK

ENGINE CONTROLS 1F-377

SSANGYONG Y158

BLANK

1F-378 ENGINE CONTROLS

SSANGYONG Y158

Circuit Description

The Engine Control Module (ECM) uses the signal from
the fuel level sensor to calculate expected vapor pres-
sure within the fuel system. Vapor pressure varies as
the fuel level changes. Vapor pressure is critical in
determining if the Evaporative Emission (EVAP) system
is operating properly. The fuel level signal is also used
to determine if the fuel level is too high or too low to be
able to accurately detect EVAP system faults. This
Diagnostic Trouble Code (DTC) detects a fuel level
sensor that sends out a noisy signal.

Conditions for Setting the DTC

Consumption test

•••••

Fuel level change is less than 2L.

•••••

Consumption since plausibilization start is greater
than 35 L.

Action Taken When the DTC Sets

•••••

The MIL will illuminate after two consecutive driving
cycle in which the diagnostic runs with the fault ac-
tive.

•••••

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.

DIAGNOSTIC TROUBLE CODE (DTC) P0460

FUEL LEVEL SENSOR PLAUSIBILITY

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

Resistance checks for the fuel level sensor:

•••••

Empty = 280 ohms or more.

•••••

Half full = about 110 ohms.

•••••

Full = 38 ohms or less.

Test Description

The number(s) below refer to specific step(s) on the
diagnostic table.

1. 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.

9. The replacement ECM must be reprogrammed. Re-

fer zto the least Techline procedure for ECM repro-
gramming.

YAB1F220

ENGINE CONTROLS 1F-379

SSANGYONG Y158

Step

Action

Value(s)

Yes

DTC P0460 Fuel Level Sensor Plausibility

Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check”

Go to Step 10

Go to Step 6

Perform the 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 over the specified mileage.
Is either Diagnostic Trouble Code (DTC) P0462 or P0463
set?
1. Turn the ignition OFF.
2. Disconnect the fuel pump connector from the fuel

pump.

3. Turn the ignition ON, with the engine OFF.
4. Using the Digital Voltmeter (DVM), measure the

voltage in the signal circuit at the fuel pump harness
connector terminal 1.

Is the voltage near the specified value?
1. Turn the ignition OFF.
2. Disconnect Engine Control Module (ECM) connector

(gray).

3. Check the fuel level sensor ground circuit for an open

between the fuel level sensor harness connector
terminal 56 and terminal 6 and repair as necessary.

Is the repair complete?
Using a DVM, measure the voltage at ECM connector
terminal 40 by back-probing the ECM connector.
Is the voltage within the specified value?
1. Removed the fuel pump from the fuel tank.
2. Reconnect the fuel pump connector.
3. Turn the ignition ON, with the engine OFF.
4. Monitor the fuel level sensor parameter on the scan

tool while moving the fuel level sensor float from the
empty position to the full position.

5. Repeat the procedure several times.
Does the fuel level sensor value on the scan tool
increase and then decrease steadily when the float is
moved?
1. Turn the ignition OFF.
2. Replace the fuel pump assembly.
Is the repair complete?
1. Turn the ignition OFF.
2. Disconnect the ECM connector.
3. Check the fuel level signal circuit for an open or short

to ground between the ECM harness connector
terminal 40 and the fuel pump harness connector
terminal 1 and repair as necessary.

Is the repair complete?

4 - 5 volts

Go to Step 4

Go to Step 5

155 miles

(250 km)

Go to

applicable

DTC table

Go to Step 3

4 - 5 volts

Go to Step 8

Go to Step 9

Go to Step 10

Go to

"Diagnostic

Aids"

Go to Step 7

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