Jaguar XJ (X350). Manual — part 1176

-> No

GO to Pinpoint Test G240073t14.

G240073t14 : CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT
FOR SHORT CIRCUIT TO B+

1. 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 B+. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST

the system for normal operation.

-> No

GO to Pinpoint Test G240073t15.

G240073t15 : CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT
FOR SHORT CIRCUIT TO GROUND

1. 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 G240073p9 : ACC
SYSTEM VOLTAGE TESTS

G240073t17 : CHECK THE IGNITION SUPPLY TO THE ACC MODULE

1. Disconnect the battery negative terminal.

Battery Disconnect and Connect 2. Disconnect the ACC module connector IP78. 3. Reconnect the

battery negative terminal.

Battery Connect (86.15.15) 4. Turn the ignition switch to the ON position. 5. 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 G240073t16.

G240073t16 : 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?

-> 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 G240073t20.

G240073t20 : CHECK THE GROUND TO THE ACC MODULE

1. Turn the ignition switch to the OFF position. 2. Disconnect the battery negative terminal.

Battery Disconnect and Connect 3. 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

G31AL. 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 G240073t21.

G240073t21 : CHECK THE IGNITION SUPPLY TO THE FLR SENSOR

1. Disconnect the FLR sensor connector EC23. 2. Reconnect the battery negative terminal.

Battery Connect (86.15.15) 3. Turn the ignition switch to the ON position. 4. Measure the voltage

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

Is the voltage less than 10 volts?

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-> 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 G240073t18.

G240073t18 : 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 G240073t22.

G240073t22 : 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 G01AL.

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 G240073p11 : SPEED
CONTROL SWITCH CIRCUIT TESTS

G240073t19 : 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 PI01. 4. Measure the resistance between the ECM connector PI01, pin 47 (WG)

and ECM connector PI01, pin 48 (YG).

Is the resistance 4310 ohms?

-> Yes

GO to Pinpoint Test G240073t23.

-> No

GO to Pinpoint Test G240073t29.

G240073t23 : CHECK THE STEERING WHEEL SPEED CONTROL RESUME
SWITCH CIRCUIT

1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01,

pin 48 (YG). 2. Operate the RESUME switch.

Does the resistance switch between 4310 ohms and 2110 ohms when the switch is operated?

-> Yes

GO to Pinpoint Test G240073t24.

-> No

INSTALL a new speed control switch assembly.

Speed Control Switch (19.75.25) TEST the system for normal operation.

G240073t24 : CHECK THE STEERING WHEEL SPEED CONTROL SET+ SWITCH
CIRCUIT

1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01,

pin 48 (YG). 2. Operate the SET+ switch.

Does the resistance switch between 4310 ohms and 1110 ohms when the switch is operated?

-> Yes

GO to Pinpoint Test G240073t25.

-> No

INSTALL a new speed control switch assembly.

Speed Control Switch (19.75.25) TEST the system for normal operation.

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