Jaguar XJ (X350). Manual — part 1181

-> No

GO to Pinpoint Test G532451t12.

G532451t12 : CHECK THE ACC MODULE TO FLR SENSOR CAN 'L' CIRCUIT
FOR SHORT CIRCUIT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between the ACC module

connector IP78, pin 02 (U) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G532451t13.

G532451t13 : CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT
FOR OPEN CIRCUIT

1. Measure the resistance between the ACC module connector IP78, pin 03 (R) and FLR sensor

connector EC23, pin 04 (R).

Is the resistance greater than 5 ohms?

-> Yes

CHECK connector IP55 for security. REPAIR the open circuit. For additional information, refer to the

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

-> No

GO to Pinpoint Test G532451t14.

G532451t14 : CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT
FOR SHORT CIRCUIT TO Power

1. Turn the ignition switch to the ON position. 2. Measure the voltage between the ACC module

connector IP78, pin 03 (R) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short to Power. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test G532451t15.

G532451t15 : CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT
FOR SHORT CIRCUIT TO GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between the ACC module

connector IP78, pin 03 (R) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

INSTALL a new FLR sensor. CLEAR the DTC. TEST the system for normal operation. If the DTC is

repeated, INSTALL a new ACC control module.

PINPOINT TEST G532451p8 : ACC
SYSTEM VOLTAGE TESTS

G532451t16 : CHECK THE IGNITION SUPPLY TO THE ACC MODULE

1. Turn the ignition switch to the OFF position. 2. Disconnect the ACC module connector IP78. 3. Turn

the ignition switch to the ON position. 4. Measure the voltage between the ACC connector IP78, pin

14 (WG) and GROUND.

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the ACC connector IP78, pin 14 (WG) and battery. This circuit includes the

passenger junction fuse box, (fuse 02). For additional information, refer to the wiring diagrams. TEST

the system for normal operation.

-> No

GO to Pinpoint Test G532451t17.

G532451t17 : CHECK THE BATTERY SUPPLY TO THE ACC MODULE

1. Measure the voltage between the ACC connector IP78, pin 15 (NW) and GROUND.

Is the voltage less than 10 volts?

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-> Yes

REPAIR the circuit between the ACC module connector IP78, pin 15 (NW) and battery. This circuit

includes the passenger junction fuse box, (fuse 27 and the switched system power relay). For

additional information, refer to the wiring diagrams. TEST the system for normal operation.

-> No

GO to Pinpoint Test G532451t18.

G532451t18 : CHECK THE GROUND TO THE ACC MODULE

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between the ACC connector

IP78, pin 12 (B) and GROUND.

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the circuit between the ACC module connector IP78, pin 12 (B) and ground connection

G31BS. Check the ground connection for contamination and security. For additional information,

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

-> No

GO to Pinpoint Test G532451t19.

G532451t19 : CHECK THE IGNITION SUPPLY TO THE FLR SENSOR

1. Disconnect the FLR sensor connector EC23. 2. Turn the ignition switch to the ON position. 3.

Measure the voltage between the FLR sensor connector EC23, pin 01 (WG) and GROUND.

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the FLR connector EC23, pin 01 (WG) and battery. For additional

information, refer to the wiring diagrams. TEST the system for normal operation.

-> No

GO to Pinpoint Test G532451t20.

G532451t20 : CHECK THE BATTERY SUPPLY TO THE FLR SENSOR

1. Measure the voltage between the FLR sensor connector EC23, pin 05 (NW) and GROUND.

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the FLR sensor connector EC23, pin 05 (NW) and battery. For additional

information, refer to the wiring diagrams. TEST the system for normal operation.

-> No

GO to Pinpoint Test G532451t21.

G532451t21 : CHECK THE GROUND TO THE FLR SENSOR

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between the FLR sensor

connector EC23, pin 02 (B) and GROUND.

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the circuit between the FLR sensor connector EC23, pin 02 (B) and ground connection G01AR.

Check ground connection for contamination and security. For additional information, refer to the

wiring diagrams. TEST the system for normal operation.

-> No

No fault is indicated with the ACC system supply voltages or grounds. To continue the diagnostics,

return to the Symptom Chart.

PINPOINT TEST G532451p9 : SPEED
CONTROL SWITCH CIRCUIT TESTS

G532451t22 : CHECK THE STEERING WHEEL SPEED CONTROL SWITCH
CIRCUIT FOR OPEN CIRCUIT

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Wait one minute for the system to become safe. 3. Disconnect

the ECM connector, EC300 (petrol) or EC66 (diesel). 4. Measure the resistance between the ECM

connector:

(Petrol) EC300, pin 35 (YG) and EC300, pin 30 (YR).

(Diesel) EC66, pin B4 (YG) and EC66, pin C4 (YR).

Is the resistance 4310 ohms?

-> Yes

GO to Pinpoint Test G532451t23.

-> No

GO to Pinpoint Test G532451t29.

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