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Contents Wiring diagrams Section: Communication Devices All sections

Module Communications Network: Diagnosis Jaguar XF I

Communication Devices ~2563 words

INSPECTION AND VERIFICATION

CAUTIONDiagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.
CAUTIONElectronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of damage and system integrity. Visual Inspection Electrical Fuses (refer to electrical guide) Wiring harness Correct engagement of electrical connectors Loose or corroded connections Routing of fibre optic harnesses Correct engagement of optical connectors Correct placement of optical connectors (ring order) Correct assembly of optical connectors (backout, etc) Damage to fibre (chafing, abrasion, kinking, cuts, etc)
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  4. If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

SYMPTOM CHART

SymptomPossible CausesAction
MOST network fault - Touch screen display displaying flashing logoMOST ring broken after the touch screen display Control module on MOST network power or ground circuit open circuit, high resistance Control module on MOST network internal failureGO to Pinpoint Test B .
MOST network fault - Touch screen display blankMOST ring broken between the information and entertainment control module and the touch screen display Information and entertainment control module or touch screen display power or ground circuit open circuit, high resistance Wake up signal not received by the information and entertainment control module Information and entertainment control module or touch screen display internal failureGO to Pinpoint Test H .

PINPOINT TEST A: MOST TESTER TESTS

Pinpoint Test A

A1 MOST TESTER BATTERY TEST
  1. Set the MOST tester power switch to 'on' Is the power LED illuminated? YES: Test passed. GO to A 2 . NO: Test failed. Install a new battery into the MOST tester. GO to A 1 .
A2 2+0 INPUT/OUTPUT TEST
  1. Set the MOST tester power switch to 'on'
  2. Set the connector selector switch to '2+0'
  3. Set the indication switch to 'beep' or 'LED'
  4. Remove the covers from the MOST tester 2+0 connector and the 2+0 loop harness connector
  5. Connect the 2+0 loop harness to the MOST tester 2+0 connector
  6. Operate the test switch and check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES Test passed. GO to A 3 . → A3
NO Test failed. MOST tester or 2+0 harness fault
A3 2+4 INPUT/OUTPUT TEST
  1. Set the MOST tester power switch to 'on'
  2. Set the connector selector switch to '2+4'
  3. Set the indication switch to 'beep' or 'LED'
  4. Remove the covers from the MOST tester 2+4 connector and the 2+4 loop harness connector
  5. Connect the 2+4 loop harness to the MOST tester 2+4 connector
  6. Operate the test switch and check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES Test passed. GO to A 4 . → A4
NO Test failed. MOST tester or 2+4 harness fault
A4 ADAPTER HARNESS AND PRISM TEST
  1. Set the MOST tester power switch to 'on'
  2. Set the connector selector switch to '2+0'
  3. Set the indication switch to 'beep' or 'LED'
  4. Remove the covers from the MOST tester 2+0 connector, the prism, and the adapter harness connectors
  5. Connect the adapter harness to the MOST tester 2+0 connector
  6. Connect the prism to the adapter harness
  7. Operate the test switch and check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES Test passed
NO Test failed. MOST tester, adapter harness or prism fault

PINPOINT TEST B: MOST NETWORK INITIAL TESTS

Pinpoint Test B

B1 MOST NETWORK INITIAL TEST 1
  1. Switch on the audio/video system
  2. Disconnect the MOST harness connector from a control module located after the touch screen display and before the information and entertainment control module
  3. Set the MOST tester power switch to 'on'
  4. Connect the MOST harness connector to the MOST tester
  5. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES The disconnected control module is causing the MOST network fault. GO to Pinpoint Test «E»(ref-568474-S27396568052013072900000) .
NO The disconnected control module is not causing MOST network fault. GO to B 2 . → B2
B2 MOST NETWORK INITIAL TEST 2
  1. Check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES MOST signal received. The MOST network fault is located downstream of the MOST tester. GO to Pinpoint Test «C»(ref-568474-S28151152892013072900000) .
NO MOST signal not received. The MOST network fault is located upstream of the MOST tester. Disconnect the MOST harness connector from the MOST tester and reconnect it to the control module. GO to Pinpoint Test «D»(ref-568474-S13303953142013072900000) .

PINPOINT TEST C: MOST NETWORK DOWNSTREAM TESTS

Pinpoint Test C

C1 MOST NETWORK DOWNSTREAM TEST 1
  1. Refer to the electrical circuit diagrams and identify the succeeding control module on the MOST network
Is this control module the information and entertainment control module?
YES GO to Pinpoint Test «F»(ref-568474-S18101252392013072900000) .
NO GO to C 2 . → C2
C2 MOST NETWORK DOWNSTREAM TEST 2
  1. Disconnect the MOST harness connector
  2. Direct the MOST harness connector at a suitable surface and check for the presence of red light
Is red light present?
YES Disconnect the MOST harness connector from the MOST tester and reconnect it to the control module. GO to C 3 . → C3
NO The fault is in the MOST harness between the MOST tester and the disconnected MOST harness connector. Install a new MOST harness as necessary
C3 MOST NETWORK DOWNSTREAM TEST 3
  1. Connect the succeeding MOST harness connector to the MOST tester
  2. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES The disconnected control module is causing the MOST network fault. GO to Pinpoint Test «E»(ref-568474-S27396568052013072900000) .
NO The disconnected control module is not causing the MOST network fault. GO to C 1 . → C1

PINPOINT TEST D: MOST NETWORK UPSTREAM TESTS

Pinpoint Test D

D1 MOST NETWORK UPSTREAM TEST 1
  1. Refer to the electrical circuit diagrams and identify the preceding control module on the MOST network Is this control module the touch screen display? YES: GO to Pinpoint Test «G»(ref-568474-S06683974082013072900000) . NO: GO to D 2 .
  2. D2: MOST NETWORK UPSTREAM TEST 2 Disconnect the MOST harness connector from the control module Direct the MOST harness connector at a suitable surface and check for the presence of red light Is red light present? YES: The MOST network fault is in the control module or the MOST harness to the succeeding control module. GO to D 3 . NO: The MOST network fault is located upstream of the disconnected control module. Reconnect the MOST harness connector to the control module. GO to D 1 .
  3. D3: MOST NETWORK UPSTREAM TEST 3 NOTE: When connecting the MOST tester, use the 2+0 or 2+4 socket as appropriate and set the connector selector switch to match the socket in use Connect the MOST harness connector to the MOST tester Check the touch screen display for indication of a MOST network fault Has the MOST network been restored? YES: The disconnected control module is causing the MOST network fault. GO to Pinpoint Test «E»(ref-568474-S27396568052013072900000) . NO: The fault is in the MOST harness between the MOST tester and the succeeding control module. Install a new MOST harness as necessary

PINPOINT TEST E: CONTROL MODULE TESTS

Pinpoint Test E

E1 CONTROL MODULE TEST 1
  1. Connect the MOST tester to the relevant control module using the adapter harness
  2. Operate the test switch and check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES MOST signal received. Tests inconclusive. Reconnect the MOST harness connector to the control module and confirm that the MOST network fault is still present. Repeat the tests from the beginning. GO to Pinpoint Test «B»(ref-568474-S22503427192013072900000) .
NO GO to E 2 . → E2
E2 CONTROL MODULE TEST 2
  1. Refer to the electrical circuit diagrams and test the relevant control module power and ground circuits for open circuit, high resistance
Are the power and ground circuits within specification?
YES GO to E 3 . → E3
NO Repair the power and/or ground circuit
E3 CONTROL MODULE TEST 3
  1. Reconnect the MOST harness to the control module
  2. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES Tests inconclusive. Repeat the tests from the beginning. GO to Pinpoint Test «B»(ref-568474-S22503427192013072900000) .
NO Install a new control module

PINPOINT TEST F: MOST NETWORK FINAL DOWNSTREAM TEST

Pinpoint Test F

F1 MOST NETWORK FINAL DOWNSTREAM TEST 1
  1. Disconnect the MOST harness connector from the MOST tester
  2. Reconnect the MOST harness connector to the control module
  3. Disconnect the MOST harness connector from the information and entertainment control module
  4. Connect the MOST harness connector to the MOST tester
  5. Operate the test switch and check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES GO to F 2 . → F2
NO The fault is in the harness between the information and entertainment control module and the preceeding control module. Install a new MOST harness as necessary
F2 MOST NETWORK FINAL DOWNSTREAM TEST 2
  1. Disconnect the MOST harness connector from the MOST tester
  2. Reconnect the MOST harness connector to the information and entertainment control module
  3. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES Tests inconclusive. Repeat the tests from the beginning. GO to Pinpoint Test «B»(ref-568474-S22503427192013072900000) .
NO Install a new information and entertainment control module

PINPOINT TEST G: MOST NETWORK FINAL UPSTREAM TESTS

Pinpoint Test G

G1 MOST NETWORK FINAL UPSTREAM TEST 1
  1. Disconnect the MOST harness connector from the touch screen display
  2. Connect the MOST tester to the touch screen display using the adapter harness
  3. Operate the test switch and check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES The fault is in the MOST harness between the touch screen display and the succeeding control module. Install a new MOST harness as necessary
NO GO to G 2 . → G2
G2 MOST NETWORK FINAL UPSTREAM TEST 2
  1. Reconnect the MOST harness to the touch screen display
  2. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES Tests inconclusive. Repeat the tests from beginning. GO to Pinpoint Test «B»(ref-568474-S22503427192013072900000) .
NO Install a new touch screen display

PINPOINT TEST H: BLANK SCREEN TESTS

Pinpoint Test H

H1 BLANK SCREEN TEST 1
  1. Switch on the audio/video system
  2. Remove the cover from the MOST diagnostic connector
  3. Set the MOST tester power switch to 'on'
  4. Connect the MOST tester to the MOST diagnostic connector
  5. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES The MOST diagnostic connector cover is causing the MOST network fault. GO to H 2 . → H2
NO The MOST diagnostic connector cover is not causing MOST network fault. GO to H 3 . → H3
H2 BLANK SCREEN TEST 2
  1. Disconnect the MOST tester
  2. Install the cover to the MOST diagnostic connector
Has the MOST network been restored?
YES No further action required
NO Install a new MOST diagnostic connector cover
H3 BLANK SCREEN TEST 3
  1. Check the MOST tester beep/LED
Did the MOST tester emit a tone or illuminate the LED?
YES MOST signal received. The MOST network fault is located downstream of the MOST tester. GO to H 4 . → H4
NO MOST signal not received. The MOST network fault is located upstream of the MOST tester. Disconnect the MOST tester from the MOST diagnostic connector and install the cover. GO to H 5 . → H5
H4 BLANK SCREEN TEST 4
  1. Disconnect the MOST harness connector from the touch screen display
  2. Direct the MOST harness connector at a suitable surface and check for the presence of red light
Is red light present?
YES GO to Pinpoint Test «J»(ref-568474-S05919013322013072900000) .
NO The fault is in the MOST harness between the MOST diagnostic connector and the touch screen display. Install a new MOST harness as necessary
H5 BLANK SCREEN TEST 5
  1. Disconnect the MOST harness connector from the information and entertainment control module
  2. Direct the information and entertainment control module at a suitable surface and check for the presence of red light
Is red light present?
YES Install a new MOST harness between the information and entertainment control module and the MOST diagnostic connector
NO GO to Pinpoint Test «I»(ref-568474-S00898919942013072900000) .

PINPOINT TEST I : INFORMATION AND ENTERTAINMENT CONTROL MODULE TESTS

Pinpoint Test I

I1 INFORMATION AND ENTERTAINMENT CONTROL MODULE TEST 1
  1. Using the manufacturer approved diagnostic system, check the information and entertainment control module for related DTCs
Is communication possible between the manufacturer approved diagnostic system and the information and entertainment control module?
YES Refer to the relevant DTC index
NO GO to I 2 . → I2
I2 INFORMATION AND ENTERTAINMENT CONTROL MODULE TEST 2
  1. Refer to the electrical circuit diagrams and test the information and entertainment control module power and ground circuits for open circuit, high resistance
Are the power and ground circuits within specification?
YES GO to I 3 . → I3
NO Repair the power and/or ground circuit
I3 INFORMATION AND ENTERTAINMENT CONTROL MODULE TEST 3
  1. Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and test the medium speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
Is the medium speed CAN bus within specification?
YES Install a new information and entertainment control module
NO Repair the medium speed CAN bus circuit

PINPOINT TEST J : TOUCH SCREEN DISPLAY TESTS

Pinpoint Test J

J1 TOUCH SCREEN DISPLAY TEST 1
  1. Refer to the electrical circuit diagrams and test the touch screen display power and ground circuits for open circuit, high resistance
Are the power and ground circuits within specification?
YES GO to J 2 . → J2
NO Repair the power and/or ground circuit
J2 TOUCH SCREEN DISPLAY TEST 2
  1. Reconnect the MOST harness to the touch screen display
  2. Check the touch screen display for indication of a MOST network fault
Has the MOST network been restored?
YES Tests inconclusive. Repeat the tests from beginning. GO to Pinpoint Test «B»(ref-568474-S22503427192013072900000) .
NO Install a new touch screen display

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