Jaguar XJ (X350). Service manual — part 1276
light does not
come on
•
Generator fault
•
CAN circuit fault
•
ECM fault
and the engine off. Replace bulbs or repair the
circuit(s) as necessary. Check for DTCs indicating a
generator, CAN or ECM fault.
Charge warning
light stays
on/battery
discharges
•
Accessory drive
belt broken
•
Generator pulley
slipping on shaft
•
Generator fault
•
Battery cable fault
•
CAN circuit fault
•
ECM fault
Check fuse 30 of the rear power distribution box. GO
to Pinpoint Test G552802p4.
Check the battery and generator cables. GO to
Pinpoint Test G552802p3.
Check for DTCs indicating a generator fault. Check
the accessory drive belt condition and tension (see
visual inspection chart). Check that the pulley does
not rotate independently of the generator. Check for
DTCs indicating a CAN or ECM fault.
Charge warning
light intermittent
•
Accessory drive
belt slipping
•
Battery cable fault
•
Generator wiring
fault
•
Generator fault
•
CAN circuit fault
Check the accessory drive belt condition and tension
(see visual inspection chart). Check the battery and
generator cables. GO to Pinpoint Test G552802p3.
Check for DTCs indicating a generator or CAN circuit
fault. Note that the use of a power pack or boost
charger may bring the warning light on until
disconnected.
Battery discharges
without the charge
warning light
staying on
•
Battery fault
•
Battery quiescent
drain
•
Intermittent
generator fault
Check the battery condition, check for battery drain.
Refer to the battery care manual. Check for DTCs
indicating a generator fault. It is possible for the
altcom circuit to short circuit to ground without
setting a DTC. If no other reason for discharge can
be found, check this circuit. GO to Pinpoint Test
G552802p1.
Noise (mechanical)
•
Accessory drive
belt slipping
•
Generator fault
Check the accessory drive belt condition and tension
(see visual inspection chart). Disconnect the
accessory drive belt and check that the generator
rotates freely. For additional information.
Accessory Drive Belt - 2.7L V6 - TdV6 (12.10.40)
DTC index
NOTE:
Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5
digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last
2 digits give extra information read by the manufacturer-approved diagnostic system).
NOTE:
For a full list of powertrain DTCs,
Electronic Engine Controls
DTC
Description
Possible causes
Action
P062200
Generator monitor
circuit plausibility
•
PWM signal incorrect
For generator monitor circuit
tests, GO to Pinpoint Test
G552802p1.
P062500
Generator monitor
circuit fault
•
Voltage sense circuit: high
resistance
•
Generator B+ circuit: high
resistance/intermittent
•
Generator monitor circuit:
short circuit to ground
Check fuse 30 of the rear power
distribution box. GO to Pinpoint
Test G552802p4.
Carry out the battery cable volt
drop tests. GO to Pinpoint Test
G552802p3.
For generator monitor circuit
tests. GO to Pinpoint Test
G552802p1.
P062600
Generator monitor
circuit fault
•
Generator connector:
loose/not connected
•
Generator monitor circuit:
short circuit to power
•
Generator monitor circuit:
high resistance
Carry out the battery cable volt
drop tests. GO to Pinpoint Test
G552802p3.
For generator monitor circuit
tests. GO to Pinpoint Test
G552802p1.
P065B00
Generator
command circuit
fault
•
Generator command circuit:
short circuit to ground
•
Generator command circuit:
short circuit to power
•
Generator command circuit:
high resistance
For generator command circuit
tests. GO to Pinpoint Test
G552802p2.
Pinpoint tests
CAUTION: When probing connectors to take measurements in the course of the pinpoint
tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result
in damage to the vehicle.
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NOTE:
When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to
3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always
take the resistance of the DMM leads into account.
NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
NOTE:
If DTCs are recorded and a fault is not present when performing the pinpoint tests, an
intermittent concern may be the cause. Always check for loose connections and corroded
terminals.
PINPOINT TEST G552802p1 :
GENERATOR MONITOR CIRCUIT
G552802t1 : CHECK THE MONITOR CIRCUIT FOR SHORT CIRCUIT TO
GROUND
1.
Circuit
Pin
Voltage sense circuit 01
Altcom
02
Altmon
03
2.
Circuit
Pin
Altmon F2
3. Key off. 4. Disconnect the generator connector, C073. 5. Key on, engine off. 6. Measure the
resistance between:
C073, harness side
Battery
Pin 03
Negative terminal
•
Is the resistance greater than 10 Kohms?
-> Yes
GO to Pinpoint Test G552802t3.
-> No
GO to Pinpoint Test G552802t2.
G552802t2 : CHECK WHETHER THE SHORT CIRCUIT IS IN THE HARNESS OR
THE MODULE
1. Key off. 2. Disconnect the ECM connector, C101. 3. Key on, engine off. 4. Measure the resistance
between:
C073, harness side
Battery
Pin 03
Negative terminal
•
Is the resistance greater than 10 Kohms?
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