Jaguar XJ (X350). Manual — part 921

Is the voltage greater than 3 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 G258127t157.

G258127t157 : CHECK THE EFT SENSOR SENSING CIRCUIT FOR SHORT TO
GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between IL09, pin 01 (WU)

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

INSTALL a new EFT sensor.

CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G258127p35 : DTC
P0532, P0533; AIR CONDITIONING
PRESSURE SENSOR CIRCUIT
LOW/HIGH VOLTAGE

G258127t158 : CHECK THE A/C PRESSURE SENSOR SENSING CIRCUIT FOR
HIGH RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the A/C pressure sensor electrical

connector, EC11. 3. Disconnect the ECM electrical connector, PI01. 4. Measure the resistance

between EC11, pin 02 (WU) and PI01, pin 121 (WU).

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 G258127t159.

G258127t159 : CHECK THE A/C PRESSURE SENSOR SENSING CIRCUIT FOR
SHORT TO HIGH VOLTAGE

1. Reconnect the ECM electrical connector, PI01. 2. Reconnect the battery negative terminal. 3. Turn

the ignition switch to the ON position. 4. Measure the voltage between EC11, pin 02 (WU) and

GROUND.

Is the voltage greater than 3 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 G258127t160.

G258127t160 : CHECK THE A/C PRESSURE SENSOR SENSING CIRCUIT FOR
SHORT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between EC11, pin 02 (WU)

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

INSTALL a new A/C pressure sensor.

Pressure Cutoff Switch - 4.2L NA V8 - AJV8/4.2L SC V8 - AJV8/3.0L NA V6 - AJ27/3.5L NA V8 - AJV8

(82.10.32)

PINPOINT TEST G258127p36 : P1251,
P1631, P1657, P1658; THROTTLE
MOTOR RELAY CONTROL CIRCUIT
MALFUNCTION/OFF FAILURE/ON
FAILURE

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G258127t161 : CHECK THE THROTTLE MOTOR RELAY POWER SUPPLIES

1. Remove the throttle motor relay. 2. Turn the ignition switch to the ON position. 3. Measure the

voltage between the relay base, pins 01 and 03 and GROUND.

Is either voltage less than 10 volts?

-> Yes

REPAIR the circuit between the relay base and battery. This circuit includes the front power

distribution box (fuse 14). For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G258127t162.

G258127t162 : CHECK THE THROTTLE MOTOR RELAY COIL DRIVE CIRCUIT
FROM THE ECM FOR HIGH RESISTANCE

1. Turn the ignition switch to the OFF position. 2. Disconnect the battery negative terminal. 3.

Disconnect the ECM electrical connector, PI01. 4. Measure the resistance between the relay base, pin

02 and PI01, pin 52 (GR).

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 G258127t163.

G258127t163 : CHECK THE THROTTLE MOTOR RELAY COIL DRIVE CIRCUIT
FROM THE ECM FOR SHORT TO B +

1. Reconnect the battery negative terminal. 2. Measure the voltage between the relay base, pin 02

and GROUND.

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 G258127t164.

G258127t164 : CHECK THE POWER SUPPLY CIRCUIT FROM THE RELAY
BASE TO THE ECM FOR HIGH RESISTANCE

1. Measure the resistance between the relay base, pin 05 and PI01, pin 134 (GU).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. This circuit includes the front power distribution box (fuse 24). For

additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal

operation.

-> No

GO to Pinpoint Test G258127t165.

G258127t165 : CHECK THE POWER SUPPLY CIRCUIT FROM THE RELAY
BASE TO THE ECM FOR SHORT TO B +

1. Measure the voltage between the relay base, pin 05 and GROUND.

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

INSTALL a new throttle motor relay. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G258127p37 : P0096,
P0097, P0098; INTAKE AIR
TEMPERATURE (IAT) SENSOR 2
SENSING CIRCUIT
RANGE/PERFORMANCE, HIGH/LOW
VOLTAGE

G258127t166 : CHECK IAT SENSOR 2 SENSING CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the IAT sensor 2 electrical connector, PI43.

3. Disconnect the ECM electrical connector, PI01. 4. Measure the resistance between PI43, pin 01

(YU) and PI01, pin 72 (YU).

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