Jaguar XJ (X350). Manual — part 946

Camshaft Position (CMP) Sensor RH (18.31.11) CLEAR the DTC. TEST the system for normal

operation.

PINPOINT TEST G531332p19 :
RADIATOR COOLING FAN MODULE
DRIVE CIRCUIT MALFUNCTION

G531332t73 : CHECK THE RADIATOR FAN MODULE PERMANENT SUPPLY

1. Disconnect the fan module electrical connector, GCU04. 2. Measure the voltage between:

Fan module connector GCU04, harness side

Battery

Single pin

Negative terminal

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the cooling fan module and battery. This circuit includes fuse 35 of the

front power distribution box (80A). For additional information, refer to the wiring diagrams. CLEAR

the DTC. TEST the system for normal operation.

-> No

Reconnect electrical connector, GCU04. GO to Pinpoint Test G531332t74.

G531332t74 : CHECK THE RADIATOR FAN MODULE GROUND

1. Disconnect the fan module electrical connector, GCU03. 2. Measure the resistance between:

Fan module connector GCU03, harness side

Battery

Single pin

Negative terminal

Is the resistance greater than 5 ohms?

-> Yes

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

DTC. TEST the system for normal operation.

-> No

Reconnect electrical connector, GCU03. GO to Pinpoint Test G531332t75.

G531332t75 : CHECK THE RADIATOR FAN MODULE EMS SWITCHED SUPPLY

1. Disconnect the fan module electrical connector, GCU01. 2. Key on, engine off. 3. Make sure the

EMS relay is engaged. 4. Measure the voltage between:

Fan module connector GCU01, harness side

Battery

Pin 02

Negative terminal

Is the voltage less than 10 volts?

-> Yes

REPAIR the circuit between the cooling fan module and battery. This circuit includes the front power

distribution box, (fuse 14) and the EMS control relay. For additional information, refer to the wiring

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

-> No

GO to Pinpoint Test G531332t76.

G531332t76 : CHECK THE ECM TO RADIATOR FAN MODULE CIRCUIT FOR
HIGH RESISTANCE

1. Key off. 2. Disconnect the ECM electrical connector, PI300. 3. Measure the resistance between:

Fan module connector GCU01, harness side ECM connector PI300, harness side

Pin 01

Pin 49

Is the resistance greater than 5 ohms?

-> Yes

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

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G531332t77.

www.

G531332t77 : CHECK THE ECM TO RADIATOR FAN MODULE CIRCUIT FOR
SHORT CIRCUIT TO POWER

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

Fan module connector GCU01, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 3 volts?

-> Yes

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

TEST the system for normal operation.

-> No

GO to Pinpoint Test G531332t78.

G531332t78 : CHECK THE ECM TO RADIATOR FAN MODULE CIRCUIT FOR
SHORT CIRCUIT TO GROUND

1. Key off. 2. Measure the resistance between:

Fan module connector GCU01, harness side

Battery

Pin 01

Negative terminal

Is the resistance less than 10,000 ohms?

-> Yes

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

TEST the system for normal operation.

-> No

INSTALL a new radiator cooling fan module. CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G531332p20 :
BATTERY POWER SUPPLY VOLTAGE
MALFUNCTION

G531332t79 : CHECK THE BATTERY POWER SUPPLY TO THE ECM

1. Disconnect the ECM electrical connector, PI300. 2. Measure the voltage between:

ECM connector PI300, harness side

Battery

Pin 54

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

Recheck the DTCs.

-> No

REPAIR the battery power supply circuit. This circuit includes fuse 17 of the front power distribution

box. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for

normal operation.

PINPOINT TEST G531332p21 : MASS
AIR FLOW (MAF) SENSOR GROUND
MALFUNCTION

G531332t80 : CHECK THE MAF SENSOR GROUND

1. Disconnect the MAF sensor electrical connector, PI14. 2. Key on, engine off. 3. Measure the

resistance between:

MAF sensor connector PI14, harness side

Battery

Pin 02

Negative terminal

Is the resistance greater than 5 ohms?

-> Yes

GO to Pinpoint Test G531332t81.

-> No

INSTALL a new MAF sensor.

Mass Air Flow (MAF) Sensor (18.30.15) CLEAR the DTC. TEST the system for normal operation.

www.