Frelander 2. Manual — part 245
Fuel Charging and Controls - I6 3.2L Petrol - Fuel Charging and Controls
Diagnosis and Testing
Principles of Operation
For a detailed description of the fuel charging and controls, refer to the relevant Description and Operation section in the
workshop manual.
REFER to:
Fuel Charging and Controls
(303-04A Fuel Charging and Controls - I6 3.2L Petrol, Description and Operation).
Inspection and Verification
CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does
not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor
vehicle.
• NOTE: For diagnostic purposes the cylinders are divided into two banks: Bank 1 - Cylinder numbers 1, 2 and 3. Bank 2 -
Cylinders 4, 5 and 6
1. Verify the customer concern.
1.
2. Visually inspect for obvious signs of mechanical or electrical damage.
2.
Visual Inspection
Mechanical
Electrical
Fuel level
Fuel leaks
Damaged fuel lines
Damaged push connect fittings
Fuel contamination/grade/quality
Throttle body
Damaged fuel tank filler pipe cap
Damaged fuel tank filler pipe
Fuses
Loose or corroded electrical connectors
Harnesses
Sensor(s)
Engine Control Module (ECM)
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before
proceeding to the next step
3.
4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively, check for
Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.
4.
Symptom Chart
Symptom
Possible Cause
Action
Engine cranks, but does not fire
Engine breather system
disconnected/restricted
Ignition system
Fuel system
Electronic engine control
Ensure the engine breather system is
free from restriction and is correctly
installed
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
Engine cranks and fires, but will
not start
Evaporative emissions purge
valve
Fuel pump
Spark plugs
HT short to ground (tracking)
check rubber boots for
cracks/damage
Ignition system
For purge valve tests.
REFER to:
Evaporative Emissions
(303-13
Evaporative Emissions, Diagnosis and
Testing).
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
Difficult cold start
Engine coolant level/anti-
freeze content
Battery
Electronic engine controls
Fuel pump
Purge valve
Check the engine coolant level and
condition.
REFER to:
Specifications
(303-03A
Engine Cooling - I6 3.2L Petrol,
Specifications).
Ensure the battery is in a fully charged
and serviceable condition
Read DTCs and refer to DTC Index for
electronic engine control tests.
Symptom
Possible Cause
Action
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
For purge valve tests.
REFER to:
Evaporative Emissions
(303-13
Evaporative Emissions, Diagnosis and
Testing).
Difficult hot start
Injector leak
Electronic engine control
Purge valve
Fuel pump
Ignition system
Check for injector leak, install new
injector as necessary.
REFER to:
Fuel Injector
(303-04A Fuel
Charging and Controls - I6 3.2L Petrol,
Removal and Installation).
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For purge valve tests.
REFER to:
Evaporative Emissions
(303-13
Evaporative Emissions, Diagnosis and
Testing).
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
Difficult to start after hot soak
(vehicle standing, engine off, after
engine has reached operating
temperature)
Injector leak
Electronic engine control
Purge valve
Fuel pump
Ignition system
Check for injector leak, install new
injector as necessary.
REFER to:
Fuel Injector
(303-04A Fuel
Charging and Controls - I6 3.2L Petrol,
Removal and Installation).
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For purge valve tests.
REFER to:
Evaporative Emissions
(303-13
Evaporative Emissions, Diagnosis and
Testing).
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
Engine stalls soon after start
Breather system
disconnected/restricted
ECM relay
Electronic engine control
Ignition system
Air intake system restricted
Air leakage
Fuel lines
Ensure the engine breather system is
free from restriction and is correctly
installed
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
Check for blockage in air filter element
and air intake system
Check for air leakage in air intake
system
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
Engine hesitates/poor acceleration
Fuel pressure, fuel pump, fuel
lines
Injector leak
Air leakage
Electronic engine control
Throttle motor
Restricted accelerator pedal
travel (carpet, etc)
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
Check for injector leak, install new
injector as necessary.
REFER to:
Fuel Injector
(303-04A Fuel
Charging and Controls - I6 3.2L Petrol,
Symptom
Possible Cause
Action
Ignition system
Transmission malfunction
Removal and Installation).
Check for air leakage in air intake
system
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
Read DTCs and refer to the DTC Index in
this section for throttle motor tests
Ensure accelerator pedal is free from
restriction
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
For transmission tests.
REFER to:
Diagnostics
(307-01 Automatic
Transmission/Transaxle, Diagnosis and
Testing).
Engine backfires
Fuel pump/lines
Air leakage
Electronic engine controls
Ignition system
Sticking variable camshaft
timing (VCT) hub
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
Check for air leakage in intake air
system
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
Read DTCs and refer to DTC Index for
VCT tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
Engine surges
Fuel pump/lines
Electronic engine controls
Throttle motor
Ignition system
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
Read DTCs and refer to DTC Index in this
section for throttle motor tests.
For ignition system tests.
REFER to:
Engine Ignition
(303-07A
Engine Ignition, Diagnosis and Testing).
Engine detonates/knocks
Electronic engine controls
Fuel pump/lines
Air leakage
Sticking VCT hub
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For fuel system tests.
REFER to:
Fuel Tank and Lines
(310-01A
Fuel Tank and Lines - I6 3.2L Petrol,
Diagnosis and Testing).
Check for air leakage in intake air
system
Read DTCs and refer to DTC Index for
VCT tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
No throttle response
Electronic engine controls
Throttle motor
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
Read DTCs and refer to DTC Index in this
section for throttle motor tests.
Symptom
Possible Cause
Action
Poor throttle response
Breather system
disconnected/restricted
Electronic engine control
Transmission malfunction
Traction control event
Air leakage
Ensure the engine breather system is
free from restriction and is correctly
installed
Read DTCs and refer to DTC Index for
electronic engine control tests.
REFER to:
Electronic Engine Controls
(303-14A Electronic Engine Controls - I6
3.2L Petrol, Diagnosis and Testing).
For transmission system tests.
REFER to:
Diagnostics
(307-01 Automatic
Transmission/Transaxle, Diagnosis and
Testing).
Check for air leakage in intake air
system
DTC Index
• NOTE: If the control module/component is suspect and the vehicle remains under manufacturer warranty, refer to the
Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior
to the installation of a new module/component.
• NOTE: Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the
scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra
information read by the manufacturer-approved diagnostic system).
• NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal
places and with a current calibration certificate. W hen testing resistance, always take the resistance of the DMM leads into
account.
• NOTE: Check and rectify basic faults before beginning diagnostic routines that involve pinpoint tests.
• NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may
be the cause. Always check for loose connections and corroded terminals.
DTC
Description
Possible Cause
Action
P008700 Fuel rail/system pressure -
too low
Leakage at the fuel lines
Fuel pressure sensor fault
Fuel pump fault
Fuel pump control module fault
Check the fuel system for leaks.
REFER to:
Fuel Tank and Lines
(310-01A Fuel
Tank and Lines - I6 3.2L Petrol, Diagnosis
and Testing).
Rectify as necessary. Check for DTCs
indicating a fuel pressure, fuel pressure
sensor, pump or pump module fault.
P008800 Fuel rail/system pressure -
too high
Restricted fuel lines
Fuel pressure sensor fault
Fuel pump fault
Fuel pump control module fault
Check the fuel system for
damage/restrictions.
REFER to:
Fuel Tank and Lines
(310-01A Fuel
Tank and Lines - I6 3.2L Petrol, Diagnosis
and Testing).
Rectify as necessary. Check for DTCs
indicating a fuel pressure, fuel pressure
sensor, pump or pump module fault.
P008968 Fuel pressure regulator
performance - algorithm
based failures
Low fuel pressure
Check for DTCs indicating a fuel pressure,
fuel pressure sensor, pump or pump module
fault.
P017068 Fuel trim, bank 1
HO2S control outside limits
No action is necessary. The code will clear
when the conditions no longer apply.
P017100 System too lean (bank 1)
Intake air leak
- Between MAF sensor and
cylinder head
Fuel system restriction
MAF sensor fault
- Low intake flow
Exhaust leak, before catalytic
converter
Check for intake air leaks. Check for low fuel
pressure and MAF sensor DTCs. Rectify as
necessary. Check for exhaust leaks before
the catalytic converter
P017200 System too rich (bank 1)
Restricted air filter
Oil contaminated with fuel
- Too many cold starts with
vehicle subsequently not
getting hot enough for long
enough
Leaking fuel injectors
MAF sensor fault
- High intake flow
Leaking evaporative emission
system purge valve
Check the condition of the air cleaner
element:
REFER to:
Air Cleaner
(303-12B Intake Air
Distribution and Filtering - TD4 2.2L Diesel,
Removal and Installation).
Check engine the oil condition. Check for
leaking injectors. Check for MAF sensor,
injector and evaporative emission system
DTCs.
P017368 Fuel trim (bank 2)
HO2S control outside limits
No action is necessary. The code will clear
when the conditions no longer apply.
P017400 System too lean (bank 2)
Intake air leak
- Between MAF sensor and
cylinder head
Fuel system restriction
Check for intake air leaks. Check for low fuel
pressure and MAF sensor DTCs. Rectify as
necessary. Check for exhaust leaks before
the catalytic converter
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