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SsangYong Musso. Manual - part 204

1F-400 ENGINE CONTROLS

SSANGYONG Y158

System Description

When malfunction of ECM coding or faulty of variant
coding of transmission, a DTC P0602 will be set.

Conditions for Setting the DTC

•••••

Coding fault.

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.

Conditions for Clearing the MIL/DTC

•••••

The MIL will turn off after three consecutive driving
cycles in which the diagnostic runs without a fault
within the Freeze Frame conditions that the DTC
failed.

DIAGNOSTIC TROUBLE CODE (DTC) P0602

CODING PLAUSIBILITY

•••••

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.

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.

4. The replacement ECM must be reprogrammed. Re-

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

Step

Action

Value(s)

Yes

DTC P602 Coding Plausibility

Perform an Euro On-Board Diagnostic (EOBD) System
Check.
Is the system check complete?

1. Install the scan tool
2. Inspect the coding condition and repair as necessary.
Is the repair complete?
Fulfill the Engine Control Module (ECM) variant coding
Is the repair complete?
1. Turn the ignition OFF.
2. Replace the ECM.
Is the repair complete?
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 ran and
passed?
Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?

Go to Step 5

Go to Step 4

Go to Step 5

Go to Step 3

Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check”

Go to Step 5

Go to Step 3

Go to Step 2

Go to

applicable

DTC table

System OK

ENGINE CONTROLS 1F-401

SSANGYONG Y158

System Description

Random Access Memory (RAM) is the microprocessor
“scratch pad.” The processor can write into, or read
from this memory as needed. This memory is volatile
and needs a constant supply of voltage to be retained. If
the voltage is lost, the memory is lost.

Conditions for Setting the DTC

•••••

RAM fault.

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) P0604

RAM TEST

Conditions for Clearing the MIL/DTC

•••••

The MIL will turn off after three consecutive driving
cycles in which the diagnostic runs without a fault
within the Freeze Frame conditions that the DTC
failed.

•••••

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.

Test Description

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

1. Euro On-Board Diagnostic (EOBD) System Check

2. The replacement ECM must be reprogrammed. Re-

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

Step

Action

Value(s)

Yes

DTC P604 RAM Test

Perform an Euro On-Board Diagnostic (EOBD) System
Check.
Is the system check complete?

1. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?
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 ran and
passed?
Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?

Go to Step 4

Go to Step 2

Go to Step 3

Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check”

Go to

applicable

DTC table

System OK

1F-402 ENGINE CONTROLS

SSANGYONG Y158

Circuit Description

The Engine Control Module (ECM) is the control center
of the fuel injection system. It constantly looks at the
in-formation form various sensors, and controls the sys-
tems that effect vehicle performance. The ECM also
performs the diagnostic Trouble Code (DTC) or DTCs
which identify the problem areas to aid the technician in
making repairs. An Electrically Erasable Programmable
Read Only Memory (EEPROM) is used to house the
program information and the calibrations required for
engine, transmission, and powertrain diagnostics opera-
tion. The ECM uses a value called a checksum for error
detection of the software. The checksum is a value that
equal to all the numbers in the software added together.
The ECM adds all the values in the software, and if that
value does not equal the checksum value, a checksum
error is indicated.

Conditions for Setting the DTC

•••••

Checksum fault.

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.

DIAGNOSTIC TROUBLE CODE (DTC) P0605

CHECKSUM TEST

•••••

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
within the Freeze Frame conditions that the DTC
failed.

•••••

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.

Test Description

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

1. Euro On-Board Diagnostic (EOBD) System Check

2. The replacement ECM must be reprogrammed. Re-

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

Step

Action

Value(s)

Yes

DTC P0605 Checksum Test

Perform an Euro On-Board Diagnostic (EOBD) System
Check.
Is the system check complete?

1. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?
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 ran and
passed?
Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?

Go to Step 4

Go to Step 2

Go to Step 3

Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check”

Go to

applicable

DTC table

System OK

ENGINE CONTROLS 1F-403

SSANGYONG Y158

BLANK

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