SsangYong Musso. Manual - part 117

1F-52 ENGINE CONTROLS

SSANGYONG  Y158

Circuit Description

When the ignition is turned ON or to the START position,
the Over Voltage Protection Relay (OVPR) is energized.

The OVPR then supplies voltage to the fuel injector,
camshaft position sensor, air flow sensor, intake man-
ifold resonance flap, camshaft actuator, fuel pump relay
and ignition coil.

Diagnostic Aids

•••••

An intermittent problem may be caused by a poor
connection, rubbed through wire insulation, or a bro-
ken wire inside the insulation.

OVER VOLTAGE PROTECTION RELAY (OVPR) CIRCUIT CHECK

•••••

A fault OVPR will cause a no start condition. There
will be no voltage supplied to the EI system ignition
coil, or the fuel injectors. Without voltage supplied
to these components, they will not operate.

Test Description

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

2. If the voltage at OVPR connector terminals 2, 6, 7,

and 8 are B+, the OVPR is OK.

9. After confirming correct voltage and ground to the

OVPR terminals, it can be determined that the
OVPR is faulty

YAB1F090

ENGINE CONTROLS 1F-53

SSANGYONG  Y158

1

1. Turn the ignition ON.
2. With the test light connect to ground, probe the Over

Voltage Protection Relay (OVPR) connector
terminals 2, 6, 7, and 8.

Is the test light on at OVPR connector terminals 2, 6, 7,
and 8 terminals?
With a Digital Voltage Meter (DVM) connected to
ground, probe the OVPR connector terminal 6.
Does the DVM display a voltage near the battery
voltage?
Check the test light.
Is the test light on at OVPR connector terminal 6 and off
at OVPR connector terminal 2, 7, and 8?
1. Turn the ignition OFF.
2. Disconnect the OVPR.
3. With the test light connected to ground, prove the

OVPR connector terminal 1.

Is the test light on?
1. Turn the ignition OFF.
2. Inspect the Instrument Panel (I/P) fuse block fuse

F10.

Is the fuse OK?
Inspect the I/P fuse block fuse F11.
Is the fuse OK?
Check the open in the wiring between the OVPR
connector terminal 1 and I/P fuse block fuse F11 and
repair as necessary.
Is the repair complete?
Replace the engine fuse block fuse F11.
Is the repair complete?
1. Turn the ignition OFF.
2. Replace the OVPR.
Is the repair complete?
Check the open in the wiring between the OVPR
connector terminal 4 and I/P fuse block fuse F10 and
repair as necessary.
Is the repair complete?
Replace the I/P fuse block fuse F10.
Is the repair complete?
Check the OVPR ground circuit for an open and repair
as necessary.
Is a repair complete?
Check the test light.
Is the test light off at OVPR connector terminal 2, 6, 7,
and 8?

Step

Action

Value(s)

Yes

No

Over Voltage Protection Relay (OVPR) Circuit Check

2

3

-

 Go to Step 2

 Go to Step 3

-

 Go to Step 4

 Go to Step 13

5

9

-

 Go to Step 12

 Go to Step 6

6

B+

System OK

 Go to Step 5

4

-

System OK

-

7

-

 Go to Step 14

 Go to Step 9

8

-

 Go to Step 10

 Go to Step 11

-

 Go to Step 7

 Go to Step 8

-

System OK

-

-

System OK

-

-

System OK

-

-

System OK

-

-

System OK

 Go to Step 9

10

11

12

13

1F-54 ENGINE CONTROLS

SSANGYONG  Y158

14

1. Ignition OFF.
2. Disconnect the OVPR.
3. Ignition ON.
4. With the test light connected to ground, prove the

OVPR connector terminal 3.

Is the test light on?
1. Turn the ignition OFF.
2. Inspect the I/P fuse block fuse F23.
Is the fuse OK?
Check the open in the wiring between the OVPR
connector terminal 3 and I/P fuse block fuse F23 and
repair as necessary.
Is the repair complete?
Replace the I/P fuse block fuse F23.
Is the repair complete?

Step

Action

Value(s)

Yes

No

Over Voltage Protection Relay (OVPR) Circuit Check (Cont’d)

15

16

-

System OK

-

-

 Go to Step 9

 Go to Step 15

-

 Go to Step 16

 Go to Step 17

-

System OK

-

17

ENGINE CONTROLS 1F-55

SSANGYONG  Y158

BLANK