Jaguar XJ (X350). Manual — part 954

INSTALL a new auxiliary coolant pump.

Water Pump CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G531332p40 : FUEL
RAIL PRESSURE (FRP) SENSOR
CIRCUIT

G531332t175 : CHECK THE FRP SENSOR SUPPLY CIRCUIT VOLTAGE

1. Key off. 2. Disconnect the FRP sensor electrical connector, PI28. 3. Key on, engine off. 4. Measure

the voltage between:

FRP sensor connector PI28, harness side

Battery

Pin 01

Negative terminal

Is the voltage less than 4 volts?

-> Yes

REPAIR the 5 volt supply circuit between the FRP sensor and the ECM. For additional information,

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

-> No

GO to Pinpoint Test G531332t177.

G531332t177 : CHECK THE FRP SENSOR SIGNAL CIRCUIT FOR SHORT
CIRCUIT TO GROUND

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

FRP sensor connector PI28, harness side

Battery

Pin 03

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 G531332t178.

G531332t178 : CHECK THE FRP SENSOR SIGNAL CIRCUIT FOR SHORT
CIRCUIT TO POWER

1. Measure the resistance between:

FRP sensor connector PI28, harness side

Battery

Pin 03

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 G531332t179.

G531332t179 : CHECK THE FRP SENSOR SIGNAL CIRCUIT FOR HIGH
RESISTANCE

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

FRP sensor connector PI28, harness side ECM connector PI300, harness side

Pin 03

Pin 71

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 G531332t180.

G531332t180 : CHECK THE FRP SENSOR GROUND CIRCUIT FOR HIGH
RESISTANCE

1. Measure the resistance between:

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FRP sensor connector PI28, harness side ECM connector PI300, harness side

Pin 02

Pin 10

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. This circuit includes splice PIS49. For additional information, refer

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

-> No

INSTALL a new FRP sensor.

Fuel Rail Pressure (FRP) Sensor (18.30.98) CLEAR the DTC and test the system for normal operation.

PINPOINT TEST G531332p36 :
MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR SENSING CIRCUIT
MALFUNCTION, HIGH/LOW VOLTAGE
(VEHICLES WITH SUPERCHARGER)

G531332t97 : CHECK THE MAP SENSOR SENSING CIRCUIT FOR HIGH
RESISTANCE

1. Key off. 2. Disconnect the MAP sensor electrical connector, PI301. 3. Disconnect the ECM electrical

connector, PI300. 4. Measure the resistance between:

MAP sensor connector PI301, harness side ECM connector PI300, harness side

Pin 01

Pin 38

Is the resistance greater than 5 ohms?

-> Yes

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

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G531332t98.

G531332t98 : CHECK THE MAP SENSOR SENSING CIRCUIT FOR SHORT
CIRCUIT TO POWER

1. Measure the voltage between:

MAP sensor connector PI301, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 3 volts?

-> Yes

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

TEST the system for normal operation.

-> No

GO to Pinpoint Test G531332t99.

G531332t99 : CHECK THE MAP SENSOR SENSING CIRCUIT FOR SHORT
CIRCUIT TO GROUND

1. Measure the resistance between:

MAP sensor connector PI301, harness side

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.

TEST the system for normal operation.

-> No

INSTALL a new MAP sensor.

Manifold Absolute Pressure (MAP) Sensor - 4.2L SC V8 - AJV8 (18.30.86) CLEAR the DTC. TEST the

system for normal operation. If the DTC is repeated, refer to the warranty policy and procedures

manual if an ECM is suspect.

PINPOINT TEST G531332p41 :
MANIFOLD ABSOLUTE

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