horn OPEL FRONTERA 1998 Workshop Manual

6E–74
ENGINE DRIVEABILITY AND EMISSIONS
No Malfunction Indicator Lamp (MIL)
D06RW00006
Circuit Description
The “Check Engine” lamp (MIL) should always be
illuminated and steady with the ignition “ON” and the
engine stopped. Ignition feed voltage is supplied to the
MIL bulb through the meter fuse. The powertrain control
module (PCM) turns the MIL “ON” by grounding the MIL
driver circuit.
Diagnostic Aids
An intermittent MIL may be cased by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:
Inspect the PCM harness and connections for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire connection,
and damaged harness.
If the engine runs OK, check for a faulty light bulb, an
open in the MIL driver circuit, or an open in the
instrument cluster ignition feed.
If the engine cranks but will not run, check for an open
PCM ignition or battery feed, or a poor PCM to engine
ground.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. A “No MIL” condition accompanied by a no-start
condition suggests a faulty PCM ignition feed or
battery feed circuit.
9. Using a test light connected to B+, probe each of the
PCM ground terminals to ensure that a good ground
is present. Refer to
PCM Terminal End View for
terminal locations of the PCM ground circuits.
12.In this step, temporarily substitute a known good
relay for the PCM relay. The horn relay is nearby,
and it can be verified as “good” simply by honking
the horn. Replace the horn relay after completing
this step.

6E–87 ENGINE DRIVEABILITY AND EMISSIONS
Fuel System Electrical Test
StepNo Ye s Va l u e ( s ) Action
9Check for short or open between the PCM and the fuel
pump relay.
Was a problem found?
—Verify repairGo to Step 10
101. Check the fuel pump relay circuit for a poor terminal
connection at the PCM.
2. If a problem is found, replace terminal as necessary.
Was a problem found?
—Verify repairGo to Step 11
11Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—
121. Reconnect the fuel pump relay.
2. Disconnect the fuel pump electrical connector at the
fuel tank.
3. Using a test light connected to ground, probe the
fuel pump feed wire (harness side).
4. Command the fuel pump “ON” with Tech 2.
Did the light illuminate for 2 seconds?
—Go to Step 15Go to Step 13
131. Honk the horn to verify that the horn relay is
functioning.
2. Substitute the horn relay for the fuel pump relay.
3. Leave the test light connected as in step 12.
4. Command the fuel pump “ON” with Tech 2.
Did the test light illuminate for 2 seconds when the fuel
pump was commanded “ON?”
—Go to Step 17Go to Step 14
141. Re-connect the horn relay in its proper location.
2. Check for a short circuit, blown fuse or open circuit
between the relay and the fuel tank.
Is the action complete?
—Verify repair—
151. With the fuel pump electrical connector at the fuel
tank disconnected, connect a test light between the
feed wire and the ground wire (harness side).
2. Command the fuel pump “ON” with Tech 2.
Did the test light illuminate for 2 seconds?
—Go to Step 18Go to Step 16
16Repair the open circuit in the fuel pump ground wire.
Is the action complete?
—Verify repair—
171. Re-connect the horn relay in its proper location.
2. Replace the fuel pump relay.
Is the action complete?
—Verify repair—
18Replace the fuel pump.
Is the action complete?
—Verify repair—

6E–323 ENGINE DRIVEABILITY AND EMISSIONS
11. Connect the fuel filler fuse at the tank.
12. Connect the air breather hose at the tank.
TS23796
13. Fill the fuel tank with fuel.
14. Tighten the fuel filler cap.
15. Connect the negative battery cable.
Throttle Body (TB)
Removal Procedure
1. Disconnect the negative battery cable.
2. Drain the cooling system. Refer to
Cooling System.
3. Remove the accelerator cable assembly. Refer to
Accelerator Cable in Engine Speed Control System..
4. Disconnect the electrical connectors:
Throttle position (TP) sensor.
Idle air control (IAC) solenoid.
Intake air temperature (IAT) sensor. Refer to
Intake Air Temperature Sensor.
035RW023
5. Disconnect the vacuum hose below the air horn.
6. Remove the intake air duct clamp.
7. Disconnect the intake air duct.
8. Disconnect the coolant lines from the throttle body.
9. Remove the bolts from the common chamber.
10. Remove the throttle body from the common chamber.
11. Remove the gasket from the upper intake manifold.
035RW024
12. Remove the IAC. Refer to Idle Air Control (IAC)
Solenoid
.
13. Remove the TP sensor. Refer to
Throttle Position
(TP) Sensor
.
Inspection Procedure
NOTE: Do not use solvent of any type when you clean the
gasket surfaces on the intake manifold and the throttle
body assembly. The gasket surfaces and the throttle
body assembly may be damaged as a result.
If the throttle body gasket needs to be replaced,
remove any gasket material that may be stuck to the
mating surfaces of the manifold.
Do not leave any scratches in the aluminum casting.
Installation Procedure
1. Install the TP sensor. Refer to Throttle Position (TP)
Sensor
.
2. Install the IAC. Refer to
Idle Air Control (IAC)
Solenoid
.
3. Install the gasket on the common chamber.
4. Install the throttle body on the common chamber.

6E–44
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
No Malfunction Indicator Lamp (MIL)
060RW136
Circuit Description
The “Check Engine” lamp (MIL) should always be
illuminated and steady with the ignition “ON” and the
engine stopped. Ignition feed voltage is supplied to the
MIL bulb through the meter fuse. The Engine Control
Module ECM turns the MIL “ON” by grounding the MIL
driver circuit.
Diagnostic Aids
An intermittent MIL may be cause by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:
Inspect the ECM harness and connections for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire
connection, and damaged harness.
If the engine runs OK, check for a faulty light bulb, an
open in the MIL driver circuit, or an open in the
instrument cluster ignition feed.
If the engine cranks but will not run, check for an open
ECM ignition or battery feed, or a poor ECM to engine
ground.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. A “No MIL” condition accompanied by a no-start
condition suggests a faulty ECM ignition feed or
battery feed circuit.
9. Using a test light connected to B+, probe each of the
ECM ground terminals to ensure that a good ground
is present. Refer to
ECM Terminal End View for
terminal locations of the ECM ground circuits.
12.In this step, temporarily substitute a known good
relay for the ECM relay. The horn relay is nearby,
and it can be verified as “good” simply by honking
the horn. Replace the horn relay after completing
this step.

HORN ANTI-THEFT
HORNFOG
LIGHT 2.0
G/O5.0
W3.0
W
5.0
W5.0
W5.0
W5.0
W
5.0
W 5.0
W5.0
W5.0
W 3.0
W
3.0
W 3.0
R/B F-3 15A
HORN
HAZARD
TA I L R E L AY
(1)(2)
HEADLIGHT
AC GENERATOR
(B) 0.85
R/BF-12 15A
TA I L
ILLUMI
0.85
OF-7 15A
ANTI-
THEFT
5.0
W 5.0
W3.0
Y/RF-8 20A
FRT FOG
LIGHTING
RELAY RELAY & FUSE BOX
3.0
W
1
X-1
4
3X-1
X-1
2
H-21
H-2
1
H-14
D08RWB14

HORN ANTI-THEFT
HORNFOG
LIGHT 2.0
G/O5.0
W
5.0
W5.0
W5.0
W5.0
W
5.0
W 5.0
W5.0
W5.0
W 3.0
W
3.0
W 3.0
R/B F-3 15A
HORN
HAZARD
HEADLIGHT
AC GENERATOR
(B)
0.85
OF-1 15A
ANTI-
THEFT
5.0
W 5.0
W3.0
Y/RF-8 20A
FRT FOG
LIGHTING
RELAY RELAY & FUSE BOX
3.0
W
1
X-1
4
3X-1
X-1
2
H-21
H-2
1
H-14
D08RWC55

H
HORN ANTI-THEFT
HORNFOG
LIGHTTAIL RELAY
(1) (2) 2.0
G/O5.0
W5.0
W5.0
W
5.0
W5.0
W5.0
W5.0
W
5.0
W 5.0
W5.0
W5.0
W
3.0
W F-3 15A
HORN
HAZARDI
AC GENERATOR
(B) 3.0
Y/RF-8 20A
FRT FOG
5.0
W
0.85
R/BF-12 15A
TA I L
ILLUMI
0.85
OF-7 15A
ANTI-THEFT
RELAY & FUSE BOX
2
H-21
H-2
1
H-14
K
J
D08RWB19

H
HORN ANTI-THEFT
HORNFOG
LIGHT 2.0
G/O5.0
W5.0
W5.0
W
5.0
W5.0
W5.0
W5.0
W
5.0
W 5.0
W5.0
W5.0
W
3.0
W F-3 15A
HORN
HAZARDI
AC GENERATOR
(B) 3.0
Y/RF-8 20A
FRT FOG
0.85
OF-1 15A
ANTI-THEFT
RELAY & FUSE BOX
2
H-21
H-2
1
H-14
K
J
D08RWC52

I-115
B-53
B1
H-2716
H-257
B-53
2 L
H-25100.85
R/B0.85
G/O
H-1612
HAZARD
WARNING
SW
TURN SIGNAL
LIGHT SWFLASHER
UNIT
0.85
G/B0.85
G/B
0.85
G/B0.85
P/B
0.85
P/B2.0
G/O0.3
R/G 0.85
G/R
ILLUMINATION
CONTROLLER
(3) 0.85
P/B 2.0
LG/B 0.5
B
1.25
B2.0
LG/B
2.0
LG/B
2.0
LG/B2.0
B/R2.0
B/R
0.85
R/B 0.85
R/B2.0
G/O
5.0
W BATT.(+)
F-3 15A
HORN,HAZARD3.0
B/Y STARTER SW
(IG1)
C-3 10A
TURN
BACK
B-12
B-12
4
B-12
5 3
LR
A
I-11I-11I-11I-11
64 2 1
I-117I-118I-11 TAIL RELAY
(4) BACK UP
LIGHT
3
B
B-53
3 E
HORN RELAY
(2)
H-276H-2710
B-19
BODY-RH
D08RW683

I-115
B-53
B1
H-204
H-202
B-53
2 L
H-25170.85
R/B0.85
G/O
H-1614
HAZARD
WARNING
SW
TURN SIGNAL
LIGHT SWFLASHER
UNIT
0.85
G/B0.85
G/B
0.85
G/B0.85
P/B
0.85
P/B2.0
G/O0.3
R/G 0.85
G/R
ILLUMINATION
CONTROLLER
(3) 0.85
P/B 2.0
LG/B 0.5
B
1.25
B2.0
LG/B
2.0
LG/B
2.0
LG/B2.0
B/R2.0
B/R
0.85
R/B 0.85
R/B2.0
G/O
5.0
W BATT.(+)
F-3 15A
HORN,HAZARD3.0
B/Y STARTER SW
(IG1)
C-3 10A
TURN
BACK
B-12
B-12
4
B-12
5 3
LR
A
I-11I-11I-11I-11
64 2 1
I-117I-118I-11 TAIL RELAY
(4) BACK UP
LIGHT
3
B
B-53
3 E
HORN RELAY
(2)
H-2519H-2520
B-19
BODY-LH
D08RW872