Opel Frontera UBS. Manual - part 15

00 – 32 SERVICE INFORMATION

MAGNETIC CLUTCH DOES NOT RUN

•

ARE NO. C-20 (10A) FUSE AND NO. C-19 (25A) FUSES OK?

YES

NO

REPLACE

•

ARE HEATER & A/C (B-36) AND THERMOSTAT (X-5)
RELAYS OK?

YES

NO

REPLACE

•

IS PRESSURE SWITCH (DUAL PRESSURE SWITCH) OK?

YES

NO

SWITCH DEFECTIVE OR INSUFFICIENT REFRIGERANT

•

ARE A/C SWITCH AND FAN CONTROL KNOB (FAN
SWITCH) OK?

YES

NO

REPLACE

•

TURN THE IGNITION SWITCH “ON” (ENGINE IS
RUNNING)

•

A/C SWITCH AND FAN CONTROL KNOB (FAN SWITCH
“ON”

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. E3-1

NO

YES

MAGNETIC CLUTCH DEFECTIVE 

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. C25-1

YES

NO

OPEN CIRCUIT BETWEEN NO. C-20 (10A) FUSE AND
NO. C25-1

•

DISCONNECT THERMO RELAY (X-5)

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE RELAY TERMINAL NO. X5-2 

YES

NO

OPEN CIRCUIT BETWEEN NO. C25-2 AND NO. X5-2 

•

CHECK TO SEE IF VOLTAGE (APPROX. 10V) IS PRESENT
CHASSIS SIDE RELAY TERMINAL NO. X5-1 AND
NO. X5-3

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SERVICE INFORMATION  00 – 33

CONTINUED PREVIOUS PAGE

NO

YES

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE RELAY TERMINAL NO. X5-1

OPEN CIRCUIT BETWEEN NO. X5-4 AND NO. E3-1

YES

NO

•

RECONNECT THERMO RELAY 

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. I42-3

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. I23-2

NO

YES

OPEN CIRCUIT BETWEEN
NO. C-20 (10A) FUSE AND
NO. I23-2

OPEN CIRCUIT BETWEEN
X5-1 AND NO. I23-6

NO

YES

•

CHECK TO SEE IF BATTERY VOLTAGE (APPROX. 10V)
IS PRESENT AT CHASSIS SIDE CONNECTOR TERMINAL
NO. I42-1

YES

NO

•

CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. I42-2

OPEN CIRCUIT BETWEEN NO. X5-3 AND NO. I42-1

YES

NO

•

OPEN CIRCUIT BETWEEN NO. I42-2 AND NO. I18-4 OR
POOR 

G

ROUND (FAN SWITCH GROUND CIRCUIT)

ELECTRO THERMO DEFECTIVE

OPEN CIRCUIT BETWEEN
NO. I23-6 AND NO. I42-3

00 – 34 SERVICE INFORMATION

4JX1 ENGINE

1

2

3

4

5

6

RELAY; A/C

B-36

C-20

10A

A/C

FL-1

80A

MAIN

1

2

B-2

C-25

2

4

X-5

1

3

4

1

3

2

4

1

A/C SW.

FAN SW.

I-23

PRESSURE
SW.

RELAY;
THERMO

B-2

C-25

I-23

BATTERY

1

E-27

MAGNETIC
CLUTCH

Mg

OFF

I-18

2

6

1

3 2 1

1 2 3

1

2

3

4

1 2

2

1

3

5

4

6

I-18

X-5

B-1

(LHD)

(RHD)

3

1

2

ELECTRONIC
THERMOSTAT

I-42

B-1

1

2

3

4

W/ CONDENSER

FAN

I-42

B-36

E-27

1

1

D08RY00170

SERVICE INFORMATION  00 – 35

MAGNETIC CLUTCH DOES NOT RUN

•

TURN THE STARTER SWITCH ON AND START THE
ENGINE.

•

TURN THE FAN SWITCH ON.

•

DOES THE BLOWER MOTOR RUN?

YES

NO

REFER TO THE DIAGNOSIS PROCEDURE FOR
“BLOWER MOTOR DOES NOT RUN”.

•

IS THE FUSE C-20 (10A) NORMAL?

YES

NO

REPLACE THE FUSE.

•

DISCONNECT THE A/C SWITCH CONNECTOR AND
REMOVE THE A/C SWITCH.

•

IS THE A/C SWITCH NORMAL?

YES

NO

YES

NO

REPAIR AN OPEN CIRCUIT BETWEEN THE
FUSE C-20 AND I23-2.

•

REINSTALL THE A/C SWITCH AND DISCONNECT THE DUAL
PRESSURE SWITCH (OR TRIPLE PRESSURE SWITCH) CON-
NECTOR C25.

•

TURN THE A/C SWITCH ON.

•

IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR C25-1?

YES

NO

REPLACE THE SWITCH.

•

RECONNECT THE CONNECTOR C25 AND DISCONNECT THE
A/C THERMO RELAY CONNECTOR X5.

•

IS THERE CONTINUITY BETWEEN HARNESS SIDE CONNEC-
TOR C25-2 AND X5-1?

YES

NO

REPAIR AN OPEN CIRCUIT BETWEEN I23-6
AND C25-1.

•

IS THE DUAL PRESSURE SWITCH (OR TRIPLE PRESSURE
SWITCH) NORMAL?

YES

NO

REPAIR OR REPLACE THE SWITCH.

•

IS THE BATTERY VOLTAGE APPLIED AT HARNESS SIDE
CONNECTOR I23-2?