Jaguar XJ (X350). Manual — part 864

PINPOINT TEST G531330p6 : RIGHT-
HAND H02S VARIABLE AND
CONSTANT CIRCUITS

G531330t19 : CHECK THE H02S VARIABLE CIRCUIT FOR SHORT CIRCUIT TO
GROUND

1. Disconnect the H02S electrical connector, PI10. 2. Measure the resistance between:

H02S connector PI10, harness side

Battery

Pin 04

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 G531330t18.

G531330t18 : CHECK THE H02S VARIABLE CIRCUIT FOR SHORT CIRCUIT TO
POWER

1. Measure the resistance between:

H02S connector PI10, harness side

Battery

Pin 04

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 G531330t22.

G531330t22 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Measure the resistance between:

H02S connector PI10, 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 G531330t21.

G531330t21 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

H02S connector PI10, 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 G531330t17.

G531330t17 : CHECK THE H02S VARIABLE CIRCUIT FOR HIGH RESISTANCE

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

H02S connector PI10, harness side ECM connector PI300, harness side

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Pin 04

Pin 28

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 G531330t20.

G531330t20 : CHECK THE H02S CONSTANT CIRCUIT FOR HIGH RESISTANCE

1. Measure the resistance between:

H02S connector PI10, harness side ECM connector PI300, harness side

Pin 03

Pin 29

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 H02S.

Heated Oxygen Sensor (HO2S) CLEAR the DTC and test the system for normal operation.

PINPOINT TEST G531330p7 : RIGHT-
HAND H02S HEATER SUPPLY AND
CONTROL CIRCUITS

G531330t23 : CHECK H02S HEATER POWER SUPPLY CIRCUIT

1. Disconnect the H02S electrical connector, PI10. 2. Key on, engine off. 3. Make sure the O2S heater

relay is engaged. 4. Measure the voltage between:

H02S connector PI10, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G531330t26.

-> No

REPAIR the power supply circuit to the H02S heater. This circuit includes the O2S heater relay and

fuse 33 of the front power distribution box. For additional information, refer to the wiring diagrams.

CLEAR the DTC and test the system for normal operation.

G531330t26 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
SHORT CIRCUIT TO GROUND

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

H02S connector PI10, 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 G531330t25.

G531330t25 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
SHORT CIRCUIT TO POWER

1. Measure the resistance between:

H02S connector PI10, harness side

Battery

Pin 02

Positive terminal

Is the resistance less than 10,000 ohms?

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