Jaguar XJ (X350). Manual — part 878

PINPOINT TEST G531330p38 : INTAKE
MANIFOLD TUNING (IMT) VALVE 1
(TOP) CIRCUIT

G531330t168 : CHECK THE IMT VALVE POWER SUPPLY CIRCUIT VOLTAGE

1. Disconnect the IMT valve electrical connector, PI30. 2. Key on, engine off. 3. Measure the voltage

between:

IMT valve connector PI30, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G531330t148.

-> No

REPAIR the circuit between the IMT valve electrical connector and battery. This circuit includes fuse

14 of the front power distribution box and the EMS control relay. For additional information, refer to

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

G531330t148 : CHECK THE IMT VALVE DRIVE CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Key off. 2. Measure the resistance between:

IMT valve connector PI30, harness side

Battery

Pin 02

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 G531330t175.

G531330t175 : CHECK THE IMT VALVE DRIVE CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

IMT valve connector PI30, harness side

Battery

Pin 02

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.

-> No

GO to Pinpoint Test G531330t169.

G531330t169 : CHECK THE IMT VALVE DRIVE CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the ECM electrical connector, PI300. 2. Measure the resistance between:

IMT valve connector PI30, harness side ECM connector PI300, harness side

Pin 02

Pin 84

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 IMT valve,

Intake Manifold Tuning (IMT) Valve LH (19.70.30) CLEAR the DTC and test the system for normal

operation.

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PINPOINT TEST G531330p37 : INTAKE
MANIFOLD TUNING (IMT) VALVE 2
(BOTTOM) CIRCUIT

G531330t176 : CHECK THE IMT VALVE POWER SUPPLY CIRCUIT VOLTAGE

1. Disconnect the IMT valve electrical connector, PI31. 2. Key on, engine off. 3. Measure the voltage

between:

IMT valve connector PI31, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G531330t178.

-> No

REPAIR the circuit between the IMT valve electrical connector and battery. This circuit includes fuse

14 of the front power distribution box and the EMS control relay. For additional information, refer to

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

G531330t178 : CHECK THE IMT VALVE DRIVE CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Key off. 2. Measure the resistance between:

IMT valve connector PI31, harness side

Battery

Pin 02

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 G531330t179.

G531330t179 : CHECK THE IMT VALVE DRIVE CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

IMT valve connector PI31, harness side

Battery

Pin 02

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.

-> No

GO to Pinpoint Test G531330t167.

G531330t167 : CHECK THE IMT VALVE DRIVE CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the ECM electrical connector, PI300. 2. Measure the resistance between:

IMT valve connector PI31, harness side ECM connector PI300, harness side

Pin 02

Pin 90

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 IMT valve,

Intake Manifold Tuning (IMT) Valve LH (19.70.30) CLEAR the DTC and test the system for normal

operation.

PINPOINT TEST G531330p25 : BRAKE
SWITCH

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