Jaguar XJ (X350). Manual — part 916

G258127t101 : CHECK THE TP SENSOR SUPPLY VOLTAGE CIRCUIT FOR
SHORT TO HIGH VOLTAGE

1. Turn the ignition switch to the ON position. 2. Measure the voltage between PI26, pin 04 (OY) and

GROUND.

Is the voltage greater than 6 volts?

-> Yes

REPAIR the short circuit to high voltage. For additional information, refer to the wiring diagrams.

CLEAR the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t102.

G258127t102 : CHECK THE TP SENSOR SUPPLY VOLTAGE CIRCUIT FOR
SHORT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between PI26, pin 04 (OY)

and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

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

the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t103.

G258127t103 : CHECK THE SUPPLY VOLTAGE AT THE FUEL TANK PRESSURE
SENSOR

1. Disconnect the fuel tank pressure sensor electrical connector, FP01. 2. Reconnect the ECM

electrical connector, PI01. 3. Turn the ignition switch to the ON position. 4. Measure the voltage

between FO01, pin 03 (OY) and GROUND.

Is the voltage less than 5 volts?

-> Yes

GO to Pinpoint Test G258127t104.

-> No

GO to Pinpoint Test G258127t105.

G258127t104 : CHECK THE FUEL TANK PRESSURE SENSOR SUPPLY
VOLTAGE CIRCUIT FOR HIGH RESISTANCE

1. Disconnect the ECM electrical connector, PI01. 2. Measure the resistance between FP01, pin 03

(OY) and PI01, pin 12 (OY).

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 G258127t105.

G258127t105 : CHECK THE FUEL TANK PRESSURE SENSOR SUPPLY
VOLTAGE CIRCUIT FOR SHORT TO HIGH VOLTAGE

1. Turn the ignition switch to the ON position. 2. Measure the voltage between FP01, pin 03 (OY) and

GROUND.

Is the voltage greater than 6 volts?

-> Yes

REPAIR the short circuit to high voltage. For additional information, refer to the wiring diagrams.

CLEAR the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t106.

G258127t106 : CHECK THE FUEL TANK PRESSURE SENSOR SUPPLY
VOLTAGE CIRCUIT FOR SHORT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between FP01, pin 03 (OY)

and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

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

the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t107.

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G258127t107 : CHECK THE SUPPLY VOLTAGE AT THE MANIFOLD ABSOLUTE
PRESSURE SENSOR

1. Disconnect the MAP sensor electrical connector, PI29. 2. Reconnect the ECM electrical connector,

PI01. 3. Turn the ignition switch to the ON position. 4. Measure the voltage between PI29, pin 02

(OY) and GROUND.

Is the voltage less than 5 volts?

-> Yes

GO to Pinpoint Test G258127t108.

-> No

GO to Pinpoint Test G258127t109.

G258127t108 : CHECK THE MANIFOLD ABSOLUTE PRESSURE SENSOR
SUPPLY VOLTAGE CIRCUIT FOR HIGH RESISTANCE

1. Disconnect the ECM electrical connector, PI01. 2. Measure the resistance between PI29, pin 02

(OY) and PI01, pin 12 (OY).

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 G258127t109.

G258127t109 : CHECK THE MANIFOLD ABSOLUTE PRESSURE SENSOR
SUPPLY VOLTAGE CIRCUIT FOR SHORT TO HIGH VOLTAGE

1. Turn the ignition switch to the ON position. 2. Measure the voltage between PI29, pin 02 (OY) and

GROUND.

Is the voltage greater than 6 volts?

-> Yes

REPAIR the short circuit to high voltage. For additional information, refer to the wiring diagrams.

CLEAR the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t110.

G258127t110 : CHECK THE MANIFOLD ABSOLUTE PRESSURE SENSOR
SUPPLY VOLTAGE CIRCUIT FOR SHORT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between PI29, pin 02 (OY)

and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

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

the DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t111.

G258127t111 : CHECK THE SUPPLY VOLTAGE AT THE FUEL RAIL PRESSURE
(FRP) SENSOR

1. Disconnect the FRP sensor electrical connector, PI28. 2. Reconnect the ECM electrical connector,

PI01. 3. Turn the ignition switch to the ON position. 4. Measure the voltage between PI28, pin 01

(OY) and GROUND.

Is the voltage less than 5 volts?

-> Yes

GO to Pinpoint Test G258127t112.

-> No

GO to Pinpoint Test G258127t113.

G258127t112 : CHECK THE FUEL RAIL PRESSURE (FRP) SENSOR SUPPLY
VOLTAGE CIRCUIT FOR HIGH RESISTANCE

1. Disconnect the ECM electrical connector, PI01. 2. Measure the resistance between PI28, pin 01

(OY) and PI01, pin 12 (OY).

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 G258127t113.

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