Jaguar XJ (X350). Manual — part 910

-> 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 G258127t36.

G258127t36 : CHECK THE H02S CONSTANT CIRCUIT FOR HIGH RESISTANCE

1. Measure the resistance between PI12, pin 04 (N) and PI01, pin 108 (N).

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 G258127t37.

G258127t37 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT TO HIGH
VOLTAGE

1. Measure the voltage between PI12, pin 04 (N) 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 G258127t38.

G258127t38 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT TO
GROUND

1. Measure the resistance between PI12, pin 04 (N) 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 H02S.

CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer

technical support for advice on possible ECM failure.

PINPOINT TEST G258127p11 : DTC
P0051, P0052; LEFT-HAND H02S
HEATER CONTROL CIRCUIT
HIGH/LOW CURRENT

G258127t39 : CHECK H02S HEATER POWER SUPPLY CIRCUIT

1. Disconnect the H02S electrical connector, PI12. 2. Turn the ignition switch to the ON position. 3.

Measure the voltage between PI12, pin 01 (WR) and GROUND.

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G258127t40.

-> No

REPAIR the power supply circuit to the H02S heater. This circuit includes the heater relay, fuse 33 of

the front power distribution box, and the high power protection module. For additional information,

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

G258127t40 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
HIGH RESISTANCE

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

Measure the resistance between PI12, pin 02 (RW) and PI01, pin 55 (RW). 4. Measure the resistance

between PI12, pin 02 (RW) and PI01, pin 56 (RW).

Is either 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 G258127t41.

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G258127t41 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
SHORT TO HIGH VOLTAGE

1. Reconnect the battery negative terminal. 2. Turn the ignition switch to the ON position. 3.

Measure the voltage between PI12, pin 02 (RW) 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 G258127t42.

G258127t42 : CHECK H02S HEATER CONTROL CIRCUIT FROM ECM FOR
SHORT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between PI12, pin 02 (RW)

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 H02S.

CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer

technical support for advice on possible ECM failure.

PINPOINT TEST G258127p12 : DTC
P0057, P0058; LEFT-HAND CATALYST
MONITOR SENSOR HEATER CONTROL
CIRCUIT LOW/HIGH RESISTANCE

G258127t43 : CHECK THE POWER SUPPLY TO THE CATALYST MONITOR
SENSOR HEATER

1. Disconnect the catalyst monitor sensor electrical connector, PI13. 2. Turn the ignition switch to the

ON position. 3. Make sure the O2S heater relay is engaged. 4. Measure the voltage between PI13, pin

01 (WR) and GROUND.

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G258127t44.

-> No

REPAIR the power supply circuit to the H02S heater. This circuit includes the heater relay, fuse 33 of

the front power distribution box, and the high power protection module. For additional information,

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

G258127t44 : CHECK THE CATALYST MONITOR SENSOR HEATER CONTROL
CIRCUIT FOR HIGH RESISTANCE

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

Measure the resistance between PI13, pin 02 (RW) and PI01, pin 93 (RW).

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.

CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer

technical support for advice on possible ECM failure.

PINPOINT TEST G258127p13 : DTC
P0196, P0197, P0198; ENGINE OIL
TEMPERATURE (EOT) SENSOR
RANGE/PERFORMANCE, HIGH/LOW
VOLTAGE

G258127t45 : CHECK THE EOT SENSOR SENSING CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the EOT sensor electrical connector, PI24.

3. Disconnect the ECM electrical connector, PI01. 4. Measure the resistance between PI24, pin 01 (Y)

and PI01, pin 78 (Y).

Is the resistance greater than 5 ohms?

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