Pinpoint Test A: CHECK THE CONTROLLER AREA NETWORK FOR OPEN CIRCUIT

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Jaguar XKR, 2006 Jaguar XK8, 2005 Jaguar XKR, 2005 Jaguar XK8, and 2004 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE CAN NETWORK FOR CONTINUITY
Measure the resistance between the diagnostic connector, FC53, pins 06 (Y) and 14 (G).

Is the resistance 60 ohms?

YES: Go to step 2.

NO: Go to step 6.
CHECK THE ECM CAN + CIRCUIT FOR CONTINUITY
Disconnect the battery negative terminal.

Disconnect the ECM electrical connector, EM80.

Measure the resistance between FC53, pin 06 (Y) and EM80, pin 124 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the circuit between splice EMS34 (Y) and EM80, pin 124 (Y).

NO: Go to step 3.
CHECK THE ECM CAN - CIRCUIT FOR CONTINUITY
Measure the resistance between FC53, pin 14 (G) and EM80, pin 123 (G).

Is the resistance greater than 5 ohms?

YES: REPAIR the circuit between splice EMS35 (G) and EM80, pin 123 (G).

NO: Go to step 4.
CHECK THE TCM CAN + CIRCUIT FOR CONTINUITY
Reconnect the ECM electrical connector, EM80.

Disconnect the TCM electrical connector, GB02.

Measure the resistance between FC53, pin 06 (Y) and GB02, pin 06 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the circuit between splice EMS32 (Y) and GB02, pin 06 (Y).

NO: Go to step 5.
CHECK THE TCM CAN - CIRCUIT FOR CONTINUITY
Measure the resistance between FC53, pin 06 (Y) and GB02, pin 06 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the circuit between splice EMS33 (G) and GB02, pin 02 (G).

NO: Go to step 6.
CHECK THE CAN + CIRCUIT BETWEEN THE DIAGNOSTIC CONNECTOR AND THE INSTRUMENT CLUSTER FOR CONTINUITY
Disconnect the IC electrical connector, FC25.

Measure the resistance between FC53, pin 06 (Y) and FC25, pin 10 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 7.
CHECK THE CAN - CIRCUIT BETWEEN THE DIAGNOSTIC CONNECTOR AND THE INSTRUMENT CLUSTER FOR CONTINUITY
Measure the resistance between FC53, pin 14 (G) and FC25, pin 24 (G).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 8.
CHECK THE IC FOR CORRECT TERMINATION
Measure the resistance between pins 11 and 23 of the IC.

Is the resistance 120 ohms?

YES: Go to step 9.

NO: Contact dealer technical support for advice on possible IC failure.
CHECK THE CAN + CIRCUIT BETWEEN THE INSTRUMENT CLUSTER AND THE J-GATE ILLUMINATION MODULE FOR CONTINUITY
Disconnect the J-Gate illumination module electrical connector, FC88.

Measure the resistance between FC25, pin 11 (Y) and FC88, pin 09 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 10.
CHECK THE CAN - CIRCUIT BETWEEN THE INSTRUMENT CLUSTER AND THE J-GATE ILLUMINATION MODULE FOR CONTINUITY
Measure the resistance between FC25, pin 23 (G) and FC88, pin 08 (G).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 11.
CHECK THE CAN + CIRCUIT BETWEEN THE J-GATE ILLUMINATION MODULE AND THE LINEAR SWITCH MODULE FOR CONTINUITY
Disconnect the Linear switch module electrical connector, FC100.

Measure the resistance between FC88, pin 04 (Y) and FC100, pin 08 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 12.
CHECK THE CAN - CIRCUIT BETWEEN THE J-GATE ILLUMINATION MODULE AND THE LINEAR SWITCH MODULE FOR CONTINUITY
Measure the resistance between FC88, pin 03 (G) and FC100, pin 07 (G).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 13.
CHECK THE CAN + CIRCUIT BETWEEN THE LINEAR SWITCH MODULE AND THE ADAPTIVE SPEED CONTROL MODULE FOR CONTINUITY
Disconnect the ASCCM electrical connector, LF61.

Measure the resistance between FC100, pin 03 (Y) and LF61, pin 10 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 14.
CHECK THE CAN - CIRCUIT BETWEEN THE LINEAR SWITCH MODULE AND THE ADAPTIVE SPEED CONTROL MODULE FOR CONTINUITY
Measure the resistance between FC100, pin 02 (G) and LF61, pin 04 (G).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 15.
CHECK THE CAN + CIRCUIT BETWEEN THE ADAPTIVE SPEED CONTROL MODULE AND THE DSCCM FOR CONTINUITY
Disconnect the DSCCM electrical connector, LF37.

Measure the resistance between LF61, pin 11 (Y) and LF37, pin 11 (Y).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 16.
CHECK THE CAN - CIRCUIT BETWEEN THE ADAPTIVE SPEED CONTROL MODULE AND THE DSCCM FOR CONTINUITY
Measure the resistance between LF61, pin 05 (G) and LF37, pin 15 (G).

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 17.
CHECK THE DSCCM FOR CORRECT TERMINATION
Measure the resistance between pins 11 and 15 of the DSCCM.

Is the resistance 120 ohms?

YES: Go to step 16.

NO: Contact dealer technical support for advice on possible DSCCM failure.