Jaguar XJ (X350). Manual — part 1002

Circuit

Pin

Knock sensor - positive

E4

Knock sensor - negative D4

3. Key off. 4. Disconnect the right hand bank KS connector, C87. 5. Disconnect the ECM connector,

C100. 6. Measure the resistance between:

C87, harness side

Battery

Pin 01

Negative terminal

Pin 02

Negative terminal

Are the resistances greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t62.

-> No

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

the system for normal operation.

G549822t62 : CHECK THE KS CIRCUIT(S) FOR SHORT CIRCUIT TO POWER

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

C87, harness side

Battery

Pin 01

Positive terminal

Pin 02

Positive terminal

Are the resistances greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t63.

-> No

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

the system for normal operation.

G549822t63 : CHECK THE KS SIGNAL AND RETURN CIRCUITS FOR SHORT
CIRCUIT TO EACH OTHER

1. Measure the resistance between:

C87, harness side C87, harness side

Pin 01

Pin 02

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t64.

-> No

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

the system for normal operation.

G549822t64 : CHECK THE KS CIRCUIT(S) FOR HIGH RESISTANCE

1. Measure the resistance between:

C87, harness side C100, harness side

Pin 01

Pin E4

Pin 02

Pin D4

Are the resistances less than 10 ohms?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. If no fault is found in the circuit, suspect the following

component(s): - KS connector - KS sensor - 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.

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PINPOINT TEST G549822p8 : KNOCK
SENSOR (KS) (LEFT HAND BANK)

G549822t65 : CHECK THE KS CIRCUIT(S) FOR SHORT CIRCUIT TO GROUND

1.

Circuit

Pin

Knock sensor - positive

01

Knock sensor - negative 02

2.

Circuit

Pin

Knock sensor - positive

D3

Knock sensor - negative C4

3. Key off. 4. Disconnect the left hand bank KS connector, C88. 5. Disconnect the ECM connector,

C100. 6. Measure the resistance between:

C88, harness side

Battery

Pin 01

Negative terminal

Pin 02

Negative terminal

Are the resistances greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t66.

-> No

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

the system for normal operation.

G549822t66 : CHECK THE KS CIRCUIT(S) FOR SHORT CIRCUIT TO POWER

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

C88, harness side

Battery

Pin 01

Positive terminal

Pin 02

Positive terminal

Are the resistances greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G549822t67.

-> No

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

the system for normal operation.

G549822t67 : CHECK THE KS SIGNAL AND RETURN CIRCUITS FOR SHORT
CIRCUIT TO EACH OTHER

1. Measure the resistance between:

C88, harness side C88, harness side

Pin 01

Pin 02

Is the resistance greater than 100 Kohms?

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