Opel Frontera UBS. Manual - part 2430

6E–34

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Fuel Injection System

060RW178

Legend

(1) ECM
(2) Meter Panel
(3) Battery
(4) Oil Temp Sensor
(5) Rail Pressure Sensor
(6) Glow Relay
(7) Oil Rail
(8) Tech–2
(9) A/C Comp Relay

(10) RPCV

(11) Intake Air Temp Sensor

(12) Engine Coolant Temp Sensor
(13) MAP Sensor
(14) EGR Valve
(15) EGR Pressure Sensor

(16) High Pressure Oil Pump
(17) Fuel Pump
(18) VSV
(19) EXH Throttle VSV1
(20) EXH Throttle VSV2
(21) EVRV
(22) Engine Harness Connector
(23) QWS Relay
(24) APS
(25) T.O.D
(26) ECT
(27) OBD
(28) TDC
(29) Injector
(30) Edge Filter

6E–35

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Guid to the System

D

Fuel Injection system is an HEUI (Hydraulically
Actuated, Electronically Controlled, Unit, Injector)
type. In this type of injector system, the oil
pressurized by means of High Pressure Oil Pump
(16) is fed through Rail Pressure Control Valve (10)
and Oil Rail (7) to Injector (29) from which fuel is
injected under this oil pressure.
For diagnosis, therefore, the Rail Pressure as well as
the Electric Circuit must be inspected.

On-Board Diagnostic (OBD) System Check

A Group

060RW135

6E–36

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

B Group

060RW133

C Group

060RW129

6E–37

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

D Group

060RW134

Circuit Description

The on-board diagnostic system check is the starting
point for any driveability complaint diagnosis.  Before
using this procedure, perform a careful visual/physical
check of the ECM and engine grounds for cleanliness and
tightness.
The on-board diagnostic system check is an organized
approach to identifying a problem created by an
electronic engine control system malfunction.

Diagnostic Aids

An intermittent may be caused by a poor connection,
rubbed-through wire insulation or a wire broken inside the
insulation.  Check for poor connections or a damaged
harness.  Inspect the ECM harness and connector for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire connection,
and damaged harness.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
1. The MIL (“Check Engine” lamp) should be “ON”

steady with the ignition “ON”/engine “OFF.”  If not,
Chart A-1 should be used to isolate the malfunction.

2. Checks the Class 2 data circuit and ensures that the

ECM is able to transmit serial data.

3. This test ensures that the ECM is capable of

controlling the MIL (“Check Engine” lamp) and the
MIL (“Check Engine” lamp) driver circuit is not
shorted to ground.

4. If the engine will not start, the 

Cranks But Will Not

Run chart should be used to diagnose the condition.

7. A Tech 2 parameter which is not within the typical

range may help to isolate the area which is causing
the problem.

9. When the ECM is replaced, the characteristic data of

injector and rail pressure sensor should be inputted.