Jaguar XJ (X350). Manual — part 942

-> 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 H02S.

Heated Oxygen Sensor (HO2S) 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 G531332p11 : LEFT-
HAND H02S HEATER CONTROL
CIRCUIT HIGH/LOW CURRENT

G531332t39 : CHECK H02S HEATER POWER SUPPLY CIRCUIT

1. Key off. 2. Disconnect the H02S electrical connector, PI12. 3. Key on, engine off. 4. Measure the

voltage between:

HO2S connector PI12, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G531332t40.

-> No

REPAIR the power supply circuit to the H02S heater. This circuit includes the heater relay and fuse 34

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

the DTC. TEST the system for normal operation.

G531332t40 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
HIGH RESISTANCE

1. Key off. 2. Disconnect the ECM electrical connector, PI300. 3. Measure the resistance between:

HO2S connector PI12, harness side ECM connector PI300, harness side

Pin 02

Pin 77

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 G531332t41.

G531332t41 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
SHORT CIRCUIT TO POWER

1. Key on, engine off. 2. Measure the voltage between:

HO2S connector PI12, harness side

Battery

Pin 02

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 G531332t42.

G531332t42 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
SHORT CIRCUIT TO GROUND

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

HO2S connector PI12, 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.

TEST the system for normal operation.

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-> No

INSTALL a new H02S.

Heated Oxygen Sensor (HO2S) 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 G531332p12 : LEFT-
HAND CATALYST MONITOR SENSOR
HEATER CONTROL CIRCUIT
LOW/HIGH RESISTANCE

G531332t43 : CHECK THE POWER SUPPLY TO THE CATALYST MONITOR
SENSOR HEATER

1. Disconnect the catalyst monitor sensor electrical connector, PI13. 2. Key on, engine off. 3. Make

sure the catalyst monitor sensor heater relay is engaged. 4. Measure the voltage between:

Catalyst monitor sensor connector PI13, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G531332t44.

-> No

REPAIR the power supply circuit to the H02S heater. This circuit includes the heater relay and fuse 34

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

the DTC. TEST the system for normal operation.

G531332t44 : CHECK THE CATALYST MONITOR SENSOR HEATER CONTROL
CIRCUIT FOR HIGH RESISTANCE

1. Key off. 2. Disconnect the ECM electrical connector, PI300. 3. Measure the resistance between:

Catalyst monitor sensor connector PI13, harness side ECM connector PI300, harness side

Pin 01

Pin 89

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

INSTALL a new catalyst monitor sensor.

Catalyst Monitor Sensor (18.30.66) 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 G531332p13 : ENGINE
OIL TEMPERATURE (EOT) SENSOR
RANGE/PERFORMANCE, HIGH/LOW
VOLTAGE

G531332t45 : CHECK THE EOT SENSOR SENSING CIRCUIT FOR HIGH
RESISTANCE

1. Key off. 2. Disconnect the EOT sensor electrical connector, PI24. 3. Disconnect the ECM electrical

connector, PI300. 4. Measure the resistance between:

EOT sensor connector PI24, harness side ECM connector PI300, harness side

Pin 02

Pin 23

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 G531332t46.

G531332t46 : CHECK THE EOT SENSOR SENSING CIRCUIT FOR SHORT
CIRCUIT TO POWER

1. Key on, engine off. 2. Measure the voltage between:

EOT sensor connector PI24, harness side

Battery

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