Kia Carnival (2009+). Instruction — part 48

3. Voltage Check Method

A. With each connector still connected, measure the voltage between the chassis ground and terminal 1 of each

connectors (A), (B) and (C) as shown in [FIG. 4].
The measured voltage of each connector is 5V, 5V and 0V respectively. So the open circuit is between
connector (C) and (B).

" CHECK SHORT CIRCUIT
1. Test Method for Short to Ground Circuit

• Continuity Check with Chassis Ground

If short to ground circuit occurs as shown in [FIG. 5], the broken point can be found by performing below Step 2
(Continuity Check Method with Chassis Ground) as shown below.

2. Continuity Check Method (with Chassis Ground)

Lightly shake the wire harness above and below, or from side to side when measuring the resistance.

Specification (Resistance)
1# or less $ Short to Ground Circuit
1M# or Higher $ Normal Circuit

1) Disconnect connectors (A), (C) and measure for resistance between connector (A) and Chassis Ground as shown

in [FIG. 6].
The measured resistance of line 1 and 2 in this example is below 1 # and higher than 1M# respectively.
Specifically the short to ground circuit is line 1 (Line 2 is normal). To find exact broken point, check the sub line of
line 1 as described in the folowing step.

2) Disconnect connector (B), and measure the resistance between connector (A) and chassis ground, and between

(B1) and chassis ground as shown in [FIG. 7].
The measured resistance between connector (B1) and chassis ground is 1# or less. The short to ground circuit is
between terminal 1 of connector (C) and terminal 1 of connector (B1).

SYMPTOM TROUBLESHOOTING GUIDE TABLE

(SYMPTOM 1) ENGINE DOES NOT START

Possible Cause

• Run out of fuel
• Starter faulty
• Fuel pump hose supply cut
• High pressure leakage
• Fuse out of order
• The compensation of individual injector not adapted
• Drift of the rail pressure sensor not detected
• Cam and Crank signals missing simultaneously
• Battery voltage too low
• Faulty immobilizer
• EGR valve blocked open
• Inlet metering valve contaminated, stuck, jammed
• Fuel quality / presence of water

• Inversion of low pressure fuel connections
• Fuel filter not adapted
• Low pressure fuel circuit sealed
• Sealed fuel filter
• Intermittent fault connection
• Air ingress in the low pressure fuel circuit
• Fuel return circuit of the pump sealed
• Engine compression too low
• Leakage at the injector
• Low pressure fuel pump faulty
• High pressure fuel pump faulty
• Injector jammed open
• Bug software or hardware fault not detected

(SYMPTOM 2) ENGINE STARTS WITH DIFFICULTY OR STARTS AND STALLS

Possible Cause

• Run out of fuel
• Fuel return hose of injector cut
• High pressure leakage
• Fuse faulty
• Air filter sealed
• Alternator or voltage regulator faulty
• The compensation of individual injector not adapted
• Drift of the engine coolant temperature sensor not

detected

• Drift of the rail pressure sensor not detected
• Battery voltage too low
• EGR valve blocked open
• Inlet metering valve contaminated, stuck, jammed
• Fuel quality / presence of water
• Inversion of low pressure fuel connections

• Low pressure fuel circuit sealed
• Sealed fuel filter
• Oil level too high/too low
• Catalytic converter sealed or damaged
• Intermittent fault connection
• Air ingress in the low pressure fuel circuit
• Fuel return circuit of the pump sealed
• Glow system faulty
• Engine compression too low
• Fuel return hose of injector sealed
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a certain

pressure)

• Gasoline in fuel
• Bug software or hardware fault not detected

(SYMPTOM 3) POOR STARTING WHEN HOT

Possible Cause

• The compensation of individual injector not adapted
• Drift of the rail pressure sensor not detected
• EGR valve blocked open
• Inlet metering valve contaminated, stuck, jammed
• Air filter sealed
• Air ingress in the low pressure fuel circuit
• Fuel quality / presence of water
• Bug software or hardware fault not detected

• Fuel return circuit of the pump sealed
• Sealed fuel filter
• Engine compression too low
• Intermittent fault connection
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a certain

pressure)

• Gasoline in fuel

(SYMPTOM 4) UNSTABLE IDLING

Possible Cause

• Fuel return hose of injector cut
• The compensation of individual injector not adapted
• Drift of the rail pressure sensor not detected
• Harness resistance increased
• Air ingress in the low pressure fuel circuit
• Fuel quality / presence of water
• Sealed fuel filter
• Air filter sealed
• Fuel return hose of injector sealed

• High pressure leakage
• Glow system faulty
• Engine compression too low
• Bad flanging of the injector
• High pressure pump out of order
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a certain

pressure)

• Injector jammed open

(SYMPTOM 5) IDLE SPEED TOO HIGH OR TOO LOW

Possible Cause

• Drift of the engine coolant temperature sensor not

detected

• Incorrect state of the electrical pack devices
• Alternator or voltage regulator faulty

• Clutch not well set
• Bug software or hardware fault not detected

(SYMPTOM 6) BLUE, WHITE, OR BLACK SMOKES

Possible Cause

• The compensation of individual injector not adapted
• Drift of the engine coolant temperature sensor not

detected

• Drift of the rail pressure sensor not detected
• EGR valve blocked open
• Inlet metering valve contaminated, stuck, jammed
• Oil level too high/too low
• Fuel quality / presence of water
• Catalytic converter sealed or damaged
• Air filter sealed

• Oil suction (engine racing)
• Glow system faulty
• Engine compression too low
• Bad flanging of the injector
• Injector washer not adapted, forgotten, doubled
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Injector jammed open
• Gasoline in fuel

(SYMPTOM 7) ENGINE RATTLING, NOISY ENGINE

Possible Cause

• The compensation of individual injector not adapted
• EGR valve blocked closed (noisy engine)
• EGR valve blocked open
• Drift of the engine coolant temperature sensor not

detected

• Glow system faulty
• Engine compression too low
• Fuel return hose of injector sealed

• Drift of the rail pressure sensor not detected
• Injector washer not adapted, forgotten, doubled
• Injector not adapted
• Carbon deposit on the injector (sealed holes)
• Needle stuck (injection possible over a certain

pressure)

• Injector jammed open

(SYMPTOM 8) BURST NOISE

Possible Cause

• The compensation of individual injector not adapted
• Intermittent fault connection
• Exhaust system sealed

• Drift of the rail pressure sensor not detected
• Inlet metering valve contaminated, stuck, jammed
• Bug software or hardware fault not detected

(SYMPTOM 9) UNTIMELY ACCELERATION/DECELERATION AND ENGINE RACING

Possible Cause

• Accelerator position sensor blocked
• EGR valve blocked open
• Intermittent fault connection

• Oil suction (engine racing)
• Drift of the rail pressure sensor not detected
• Bug software or hardware fault not detected

(SYMPTOM 10) GAP WHEN ACCELERATING AND AT RE-COUPLING (RESPONSE TIME)

Possible Cause

• Air inlet circuit open
• Incorrect state of the electrical pack devices
• Accelerator position sensor blocked
• EGR valve blocked open
• Turbo charger damaged
• Sealed fuel filter

• Engine compression too low
• High pressure leakage
• Inlet metering valve contaminated, stuck, jammed
• Needle stuck (injection possible over a certain

pressure)

• Bug software or hardware fault not detected

(SYMPTOM 11) ENGINE STOP OR STALLING

Possible Cause

• Run out of fuel
• Fuel pump hose supply cut

• Inlet metering valve contaminated, stuck, jammed
• Alternator or voltage regulator faulty