Jaguar XJ (X350). Manual — part 1000

CR14, harness side

Battery

Pin 06

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

Suspect: - ECM

-> No

REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test

the system for normal operation.

PINPOINT TEST G549822p6 : AIR
CHARGE TEMPERATURE (ACT)
SENSOR

G549822t49 : CHECK THE ACT SENSOR RETURN CIRCUIT FOR HIGH
RESISTANCE

1.

Circuit

Pin

Air charge temperature sensor - signal

01

Air charge temperature sensor - return 02

2.

Circuit

Pin

Air charge temperature sensor - signal

B1

Air charge temperature sensor - return G3

Resistance (ohms) Temperature (degrees C) Temperature (degrees F) Volts

209603

-40

-40

4.9179

120372

-30

-22

4.8587

71668

-20

-04

4.7672

44087

-10

14

4.6323

27936

0

32

4.4433

18187

10

50

4.1931

12136

20

68

3.8808

8284

30

86

3.5149

5774

40

104

3.1130

4103

50

122

2.6983

2967

60

140

2.2940

2182

70

158

1.9201

1628

80

176

1.5874

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1233

90

194

1.3026

949

100

212

1.0639

735

110

230

0.8678

578

120

248

0.7087

459

130

266

0.5797

3. Key off. 4. Disconnect the ACT sensor connector, C69. 5. Key on, engine off. 6. Measure the

resistance between:

C69, harness side

Battery

Pin 02

Negative terminal

Is the resistance less than 10 ohms?

-> Yes

GO to Pinpoint Test G549822t52.

-> No

GO to Pinpoint Test G549822t50.

G549822t50 : CHECK THE ACT SENSOR RETURN CIRCUIT FOR SHORT
CIRCUIT TO POWER

1. Measure the resistance between:

C69, harness side

Battery

Pin 02

Positive terminal

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t51.

-> No

GO to Pinpoint Test G549822t59.

G549822t51 : CHECK THE ACT SENSOR TO ECM RETURN CIRCUIT FOR HIGH
RESISTANCE

1. Key off. 2. Disconnect the ECM connector, C101. 3. Measure the resistance between:

C69, harness side C101, harness side

Pin 02

Pin G3

Is the resistance less than 10 ohms?

-> Yes

Suspect: - ECM connector - ECM

-> No

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear any

DTCs, test the system for normal operation.

G549822t52 : CHECK FOR POWER TO THE ACT SENSOR

1. Measure the voltage between:

C69, harness side

Battery

Pin 01

Negative terminal

Is the voltage between 4.8 - 5.2 volts?

-> Yes

GO to Pinpoint Test G549822t56.

-> No

GO to Pinpoint Test G549822t53.

G549822t53 : CHECK THE ACT SIGNAL CIRCUIT FOR SHORT CIRCUIT TO
GROUND

1. Measure the resistance between:

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