SsangYong Musso. Manual - part 208

1F-416  ENGINE CONTROLS

SSANGYONG  Y158

DIAGNOSTIC TROUBLE CODE (DTC) P0662

RESONANCE FLAP SHORT CIRCUIT TO BATTERY (3.2L DOHC)

Circuit Description

A pneumatically actuated resonance flap is located on
the intake manifold, and will be opened and closed by
load, which operates resonance flap according to engine
and controlled by ECM and rpm.

Resonance flap is closed at idle/partial load (less than
3,800/rpm.). The switch valve will be adjusted by ECM
and resonance flap will be closed. By increasing air flow
passage through dividing intaking air flow toward both
air collection housing. This leads to a significant in-
crease in  the torque in the lower speed range.

Resonance flap is open at full load (at full load : over
3,800/rpm). The switch valve will not be adjusted by ECM
and resonance flap will be open. The collected air in the
air collection housing will not be divided and intaking air
passage will be shorten.

Conditions for Setting the DTC

•••••

The current is between 2.2 and 4.3 amperes.
 (depending on driver condition)

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

An intermittent problem may be caused by a poor con-
nection, rubbed-through wire insulation, or a wire that is
broken inside the insulation.

Any circuitry, should be thoroughly checked for the fol-
lowing conditions:

•••••

Backed-out terminals

•••••

Improper mating

•••••

Broken locks

•••••

Improperly formed

•••••

Damaged terminals

•••••

Poor terminal-to-wire connection

•••••

Physical damage to the wiring harness

Test Description

Number(s) below refer to the step(s) number 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 to  the latest Techline procedure for ECM repro-
gramming.

YAB1F230

ENGINE CONTROLS  1F-417

SSANGYONG  Y158

1

Step

Action

Value(s)

Yes

No

DTC P0662 Resonance Flap Short Circuit to Battery (3.2L DOHC)

2

3

4

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 engine at normal temperature.
Are any additional Diagnostic Trouble Codes (DTCs)
set?
1. Start the engine and Idle at normal operating

temperature.

2. Operate the vehicle within the specified parameters

under conditions and Conditions for Setting The DTC.

Does the scan tool indicate DTC P0662 this driving
cycle?
1. Turn the ignition OFF.
2. Disconnect the resonance flap electrical connector.
3. Turn the ignition ON.
4. Using a Digital Voltmeter (DVM), measure the
resonance flap connector terminal 2.
Does the voltage displayed as specified?
Using a DVM measure the voltage at resonance flap
connector terminal 1.
Does the voltage displayed as specified?
With a test light connected to ground, probe the
resonance flap circuit terminal1.
Does the test light illuminate?
1. Turn the ignition OFF.
2. Replace the resonance flap.
Is the repair complete?
Check the resonance flap circuit from terminal 1 to ECM
for short to battery and repair as necessary.
Is the repair complete?
1. Turn the ignition OFF.
2. Replace the ECM.
Is the repair complete?
Check for short in the wire between resonance flap
terminal 2 and Over Voltage Protection Relay (OVPR)
connector terminal 2 and repair as necessary.
Is the repair complete?

-

 Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check”

B+

 Go to Step 5

 Go to Step 10

5

6

7 v

 Go to Step 7

 Go to Step 6

7

-

 Go to Step 11

-

-

 Go to Step 11

 Go to Step 9

-

 Go to Step 11

-

8

9

10

-

 Go to Step 11

Go to “OVPR

Circuit Check”

-

 Go to Step 8

Go to

“Diagnostic

Aids”

-

Go to Step 4

Go to

“Diagnostic

Aids”

-

Go to

applicable

DTC table

 Go to Step 3

1F-418  ENGINE CONTROLS

SSANGYONG  Y158

Step

Action

Value(s)

Yes

No

DTC P0662 Resonance Flap Short Circuit to Battery (3.2L DOHC) (Cont’d)

11

12

1. If disconnected, reconnect the resonance flap

electrical connector.

2. Using the scan tool, clear the Diagnostic Trouble

Codes (DTCs)

3. Start the engine and idle at normal operating

temperature.

4. Operate the vehicle within the conditions for setting

the DTC as specified in the supporting text.

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

-

Go to Step 12

 Go to Step 2

-

Go to

applicable

DTC table

System OK

ENGINE CONTROLS  1F-419

SSANGYONG  Y158

BLANK