Jaguar XJ (X350). Manual — part 1182

G532451t23 : CHECK THE STEERING WHEEL SPEED CONTROL RESUME
SWITCH CIRCUIT

1. 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). 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 G532451t24.

-> No

INSTALL a new speed control switch assembly.

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

G532451t24 : CHECK THE STEERING WHEEL SPEED CONTROL SET+ SWITCH
CIRCUIT

1. 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). 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 G532451t25.

-> No

INSTALL a new speed control switch assembly.

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

G532451t25 : CHECK THE STEERING WHEEL SPEED CONTROL HEADWAY-
SWITCH CIRCUIT

1. 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). 2. Operate the HEADWAY- switch.

Does the resistance switch between 4310 ohms and 600 ohms when the switch is operated?

-> Yes

GO to Pinpoint Test G532451t26.

-> No

INSTALL a new speed control switch assembly.

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

G532451t26 : CHECK THE STEERING WHEEL SPEED CONTROL HEADWAY+
SWITCH CIRCUIT

1. 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). 2. Operate the HEADWAY+ switch.

Does the resistance switch between 4310 ohms and 300 ohms when the switch is operated?

-> Yes

GO to Pinpoint Test G532451t27.

-> No

INSTALL a new speed control switch assembly.

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

G532451t27 : CHECK THE STEERING WHEEL SPEED CONTROL SET- SWITCH
CIRCUIT

1. 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). 2. Operate the SET- switch.

Does the resistance switch between 4310 ohms and 120 ohms when the switch is operated?

-> Yes

GO to Pinpoint Test G532451t28.

-> No

INSTALL a new speed control switch assembly.

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

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G532451t28 : CHECK THE STEERING WHEEL SPEED CONTROL CANCEL
SWITCH CIRCUIT

1. 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). 2. Operate the CANCEL switch.

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

-> Yes

No fault is indicated with the steering wheel speed control switches or circuit. To continue the

diagnostics, return to the Symptom Chart.

-> No

INSTALL a new speed control switch assembly.

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

G532451t29 : CHECK THE STEERING WHEEL SPEED CONTROL SWITCH
CIRCUIT FOR OPEN CIRCUIT

1. Disconnect the clockspring connector SW08. 2. Measure the resistance between the clockspring

connector SW08, pin 08, component side and clockspring connector SW08, pin 06, component side.

Is the resistance 4310 ohms?

-> Yes

GO to Pinpoint Test G532451t31.

-> No

GO to Pinpoint Test G532451t30.

G532451t30 : CHECK THE STEERING WHEEL SPEED CONTROL SWITCH FOR
OPEN CIRCUIT

1. Disconnect the steering wheel speed control switch. 2. Measure the resistance between the

steering wheel speed control switch connector pins 01 and 02 component side.

Is the resistance 4310 ohms?

-> Yes

INSTALL a new clockspring.

Clockspring (86.65.92) TEST the system for normal operation.

-> No

INSTALL a new speed control switch assembly.

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

G532451t31 : CHECK THE STEERING WHEEL SPEED CONTROL SWITCH
CIRCUIT FOR OPEN CIRCUIT

1. Measure the resistance between the clockspring connector SW08, pin 08 (YR) and the ECM

connector:

(Petrol) EC300, pin 30 (YR).

(Diesel) EC66, pin C4 (YR).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the circuit ECM connector to clockspring connector SW08, pin 08 (YR). For additional

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

-> No

GO to Pinpoint Test G532451t32.

G532451t32 : CHECK THE STEERING WHEEL SPEED CONTROL SWITCH
CIRCUIT FOR OPEN CIRCUIT

1. Measure the resistance between the clockspring connector SW08, pin 06 (YG) and the ECM

connector:

(Petrol) EC300, pin 35 (YG).

(Diesel) EC66, pin B4 (YG).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the circuit ECM connector to clockspring connector SW08, pin 06 (YG). For additional

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

-> No

INSTALL a new speed control switch assembly.

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

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