Jaguar XJ (X350). Manual — part 592

6

—

Thermostat

7

—

Engine oil cooler

8

—

Lower hose

9

—

Coolant expansion tank

10

—

Radiator

11

—

Auxiliary coolant flow pump

12

—

Upper hose

Vehicles with 4.2L engine with supercharger

Item

Part Number

Description

1

—

EGR valve

2

—

Heater core

3

—

Throttle body

4

—

Charge air cooler (right-hand)

5

—

Water pump

6

—

Charge air cooler (left-hand)

7

—

Engine bank (left-hand)

8

—

Thermostat

9

—

Auxiliary coolant flow pump

10

—

Coolant expansion tank

11

—

Lower hose

12

—

Radiator

13

—

SC radiator

14

—

SC coolant pump

15

—

Upper hose

www.

Diagnosis and testing

Engine Cooling

1 . Verify the customer concern.

2 . Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical

Electrical

Leaks

Fuse

Coolant expansion

tank

Wiring harness

Electric fan

Loose or corroded connector(s)

Radiator

Engine cooling temperature (ECT) sensor or engine cylinder head temperature

(CHT) sensor

1 . If an obvious cause for an observed or reported concern is found, correct the cause (if possible)

before proceeding to the next step.

2 . If the concern is not visually evident, verify the symptom and refer to symptom chart.

DTC

Condition

Possible Source

Action

P0116

Concern with engine coolant

temperature

(range/performance)

•

ECT sensor.

•

ECT sensor circuit(s).

•

Low/contaminated coolant.

•

Thermostat failure.

•

Overheating.

For V6 vehicles, <<303-

14A>> For V8 Vehicles,

<<303-14B>>

P0117

Concern with engine coolant

temperature (low input)

•

ECT sensor.

•

ECT sensor circuit (short to
ground/open circuit).

For V6 vehicles, <<303-

14A>> For V8 Vehicles,

<<303-14B>>

P0118

Concern with engine coolant

temperature (high input)

•

ECT sensor.

•

ECT sensor circuit (short to
ground/open circuit).

For V6 vehicles, <<303-

14A>> For V8 Vehicles,

<<303-14B>>

P0125

Concern with engine coolant

temperature (insufficient for

close loop control)

•

ECT sensor.

•

ECT sensor circuit (short to
ground/open circuit).

For V6 vehicles, <<303-

14A>> For V8 Vehicles,

<<303-14B>>

P1474

Concern with engine coolant

temperature

Water pump malfunction.

Water Pump - 3.0L, VIN

Range: G00442-

>G45703 (26.50.01)

Water Pump - 4.2L,

Vehicles With:

Supercharger

(26.50.01)

Water Pump -

3.5L/4.2L, Vehicles

Without: Supercharger

(26.50.01)

None

Concern with coolant loss

•

Hoses.

•

Hose connections.

•

Radiator.

•

Water pump.

•

Heater core.

•

Gaskets.

•

Engine casting cracks.

•

Engine block core plugs.

GO to Pinpoint Test

G234419p1.

None

Concern with overheating

•

Engine coolant
(level/condition).

•

Thermostat.

•

Fan motor.

•

Fan motor fuses and/or
circuits.

•

ECT sensor.

•

Engine control module
(ECM).

•

Fan speed module.

GO to Pinpoint Test

G234419p2.

None

Concern with engine not

reaching normal temperature

•

Thermostat.

•

Electric fan.

•

Fan speed module.

GO to Pinpoint Test

G234419p3.

PINPOINT TEST G234419p1 : LOSS OF
COOLANT

www.