Jaguar XJ (X350). Manual — part 778

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC and test the system for normal operation.

-> No

GO to Pinpoint Test G528708t19.

G528708t19 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR
GROUND CIRCUIT FOR HIGH RESISTANCE

1. Measure the resistance between:

Secondary air injection MAP sensor connector, EC120 ECM connector, EC300

Pin 03

Pin 07

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC and test the system for normal operation.

-> No

INSTALL a new secondary air injection MAP sensor. CLEAR the DTC and test the system for normal

operation.

PINPOINT TEST G528708p4 : CHECK
THE SECONDARY AIR INJECTION
VALVE CIRCUITS

G528708t20 : CHECK THE SECONDARY AIR INJECTION VALVE SUPPLY
VOLTAGE

1. Key off. 2. Disconnect the secondary air injection valve electrical connector, PI90. 3. Key on, engine

off. 4. Measure the voltage between:

Secondary air injection valve connector, PI90

Battery

Pin 02

Negative terminal

Is the voltage less than 10 volts?

-> Yes

REPAIR the supply circuit between the secondary air injection valve and battery. This circuit includes

fuse 27 of the front power distribution box and the mega fuse. For additional information, refer to

the wiring diagrams. CLEAR the DTC and test the system for normal operation.

-> No

GO to Pinpoint Test G528708t21.

G528708t21 : CHECK THE SECONDARY AIR INJECTION VALVE CONTROL
CIRCUIT FOR SHORT CIRCUIT TO GROUND

1. Measure the resistance between:

Secondary air injection valve connector, PI90

Battery

Pin 01

Negative terminal

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC and

test the system for normal operation.

-> No

GO to Pinpoint Test G528708t22.

G528708t22 : CHECK THE SECONDARY AIR INJECTION VALVE CONTROL
CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:

Secondary air injection valve connector, PI90

Battery

Pin 01

Positive terminal

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC and

test the system for normal operation.

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-> No

GO to Pinpoint Test G528708t23.

G528708t23 : CHECK THE SECONDARY AIR INJECTION VALVE CONTROL
CIRCUIT FOR HIGH RESISTANCE

1. Disconnect the ECM electrical connector, EC300. 2. Measure the resistance between:

Secondary air injection valve connector, PI90 ECM connector, EC300

Pin 01

Pin 55

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC and test the system for normal operation.

-> No

INSTALL a new secondary air injection valve.

Secondary Air Injection (AIR) Control Valve - 3.0L NA V6 - AJ27

Secondary Air Injection (AIR) Control Valve - 4.2L NA V8 - AJV8/3.5L NA V8 - AJV8

Secondary Air Injection (AIR) Control Valve - 4.2L SC V8 - AJV8 CLEAR the DTC and test the system for

normal operation.

Removal and installation

Exhaust Gas Recirculation (EGR) Valve
(17.45.01)

Removal

Left-hand drive vehicles with Supercharger

1 . Remove the cabin air filter.

For additional information, refer to Cabin Air Filter (76.10.09)

2 . Remove the cabin air filter housing retaining nut.

3 . Remove the cabin air filter housing.

4 . Remove the engine compartment panel.

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