Opel Frontera UBS. Service 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
CONTINUED NEXT PAGE
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?
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