Jaguar XJ (X350). 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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