Jaguar XJ (X350). Service 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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