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Part 2




STEP 32. Check the wiring harness between joint connector (CAN1) C-103 and satellite radio tuner connector C-111 for line-to-line short. Measure the resistance at joint connector (CAN1) C-103.

(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1).





(2)Check that there is continuity between joint connector (CAN1) terminals 3 and 14.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 33.

NO Go to Step 52.

STEP 33. Check the wiring harness between joint connector (CAN1) C-103 and EATCS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN1) C-103.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, and check that there is continuity at the harness side of joint connector (CAN1).





(2)Check that there is continuity between joint connector (CAN1) terminals 6 and 19.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 53.

NO Repair the wiring harness between joint connector (CAN1) C-103 and ETACS-ECU connector C-301.

STEP 34. Check the wiring harness between joint connector (CAN1) C-103 and combination meter connector C-03 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and combination meter connector C-03, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.4) and combination meter connector C-03 (terminal No.14)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.15) and combination meter connector C-03 (terminal No.15)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and combination meter connector C-03 in good condition?

YES (vehicles with KOS) : Go to Step 35.

YES (vehicles with WCM) : Go to Step 36.

NO (vehicles with KOS or WCM) : Repair the wiring harness between joint connector (CAN1) C-103 and combination meter connector C-03.

STEP 35. Check the wiring harness between joint connector (CAN1) C-103 and KOS-ECU connector C-102 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and KOS-ECU connector C-102, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.8) and KOS-ECU connector C-102 (terminal No.1)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.21) and KOS-ECU connector C-102 (terminal No.2)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and KOS-ECU connector C-102 in good condition?

YES Go to Step 37.

NO Repair the wiring harness between joint connector (CAN1) C-103 and KOS-ECU connector C-102.

STEP 36. Check the wiring harness between joint connector (CAN1) C-103 and WCM connector C-29 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and WCM connector C-29, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.5) and WCM connector C-29 (terminal No.11)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.16) and WCM connector C-29 (terminal No.2)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and WCM connector C-29 in good condition?

YES Go to Step 37.

NO Repair the wiring harness between joint connector (CAN1) C-103 and WCM connector C-29.

STEP 37. Check the wiring harness between joint connector (CAN1) C-103 and SRS-ECU connector C-28 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and SRS-ECU connector C-28, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.2) and SRS-ECU connector C-28 (terminal No.15)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.13) and SRS-ECU connector C-28 (terminal No.16)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and SRS-ECU connector C-28 in good condition?

YES Go to Step 38.

NO Repair the wiring harness between joint connector (CAN1) C-103 and SRS-ECU connector C-28.

STEP 38. Check the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-34-2 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and occupant classification-ECU connector D-34-2, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.11) and occupant classification-ECU connector D-34-2 (terminal No.24)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.24) and occupant classification-ECU connector D-34-2 (terminal No.25)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-34-2 in good condition?

YES Go to Step 39.

NO : Repair the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-34-2.

STEP 39. Check the wiring harness between joint connector (CAN1) C-103 and A/C-ECU connector C-109 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and A/C-ECU connector C-109, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.9) and A/C-ECU connector C-109 (terminal No.11)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.22) and A/C-ECU connector C-109 (terminal No.12)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and A/C-ECU connector C-109 in good condition?

YES (vehicles without MMCS) : Go to Step 40.

YES (vehicles with MMCS) : Go to Step 41.

NO : Repair the wiring harness between joint connector (CAN1) C-103 and A/C-ECU connector C-109.

STEP 40. Check the wiring harness between joint connector (CAN1) C-103 and radio and CD player or CD changer connector C-16 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and radio and CD player or CD changer connector C-16, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.10) and radio and CD player or CD changer connector C-16 (terminal No.23)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.23) and radio and CD player or CD changer connector C-16 (terminal No.33)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and radio and CD player or CD changer connector C-16 in good condition?

YES (vehicles without satellite radio) : Go to Step 43.

YES (vehicles with satellite radio) : Go to Step 42.

NO : Repair the wiring harness between joint connector (CAN1) C-103 and radio and CD player or CD changer connector C-16.

STEP 41. Check the wiring harness between joint connector (CAN1) C-103 and CAN box unit connector C-13 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and CAN box unit connector C-13, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.10) and CAN box unit connector C-13 (terminal No.8)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.23) and CAN box unit connector C-13 (terminal No.9)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and CAN box unit connector C-13 in good condition?

YES (vehicles without satellite radio) : Go to Step 43.

YES (vehicles with satellite radio) : Go to Step 42.

NO : Repair the wiring harness between joint connector (CAN1) C-103 and CAN box unit connector C-13.

STEP 42. Check the wiring harness between joint connector (CAN1) C-103 and satellite radio tuner connector C-111 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and satellite radio tuner connector C-111, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.3) and satellite radio tuner connector C-111 (terminal No.4)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.14) and satellite radio tuner connector C-111 (terminal No.11)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and satellite radio tuner connector C-111 in good condition?

YES Go to Step 43.

NO Repair the wiring harness between joint connector (CAN1) C-103 and satellite radio tuner connector C-111.

STEP 43. Check the wiring harness between joint connector (CAN1) C-103 and ETACS-ECU connector C-301 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-103 and ETACS-ECU connector C-301, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.6) and ETACS-ECU connector C-301 (terminal No.6)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-103 (terminal No.19) and ETACS-ECU connector C-301 (terminal No.7)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-103 and ETACS-ECU connector C-301 in good condition?

YES Go to Step 53.

NO Repair the wiring harness between joint connector (CAN1) C-103 and ETACS-ECU connector C-301.

STEP 44. Using scan tool MB991958, diagnose the CAN bus line. (checking the combination meter for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect combination meter connector C-03.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and combination meter connector C-03.

NO Check combination meter connector C-03, and repair if necessary. If the combination meter connector is in good condition, replace the combination meter.

STEP 45. Using scan tool MB991958, diagnose the CAN bus line. (checking the KOS-ECU for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect KOS-ECU connector C-102.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and KOS-ECU connector C-102.

NO Check KOS-ECU connector C-102, and repair if necessary. If the KOS-ECU connector is in good condition, replace the KOS-ECU.

STEP 46. Using scan tool MB991958, diagnose the CAN bus line. (checking the WCM for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect WCM connector C-29.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and WCM connector C-29.

NO Check WCM connector C-29, and repair if necessary. If the WCM connector is in good condition, replace the WCM.

STEP 47. Using scan tool MB991958, diagnose the CAN bus line. (checking the SRS-ECU for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect SRS-ECU connector C-28.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and SRS-ECU connector C-28.

NO Check SRS-ECU connector C-28, and repair if necessary. If the SRS-ECU connector is in good condition, replace the SRS-ECU.

STEP 48. Using scan tool MB991958, diagnose the CAN bus line. (checking the occupant classification-ECU for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect occupant classification-ECU connector D-34-2.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Check intermediate connectors C-31 and D-34, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector D-34-2.

NO Check occupant classification-ECU connector D-34-2, and repair if necessary. If the occupant classification-ECU connector is in good condition, replace the occupant classification-ECU.

STEP 49. Using scan tool MB991958, diagnose the CAN bus line. (checking the A/C-ECU for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect A/C-ECU connector C-109.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and A/C-ECU connector C-109.

NO Check A/C-ECU connector C-109, and repair if necessary. If the A/C-ECU connector is in good condition, replace the A/C-ECU.

STEP 50. Using scan tool MB991958, diagnose the CAN bus line. (checking the radio and CD player or radio and CD changer for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect radio and CD player or CD changer connector C-16.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and radio and CD player or radio and CD changer connector C-16.

NO Check radio and CD player or radio and CD changer connector C-16, and repair if necessary. If the radio and CD player or radio and CD changer connector is in good condition, replace the radio and CD player or radio and CD changer.

STEP 51. Using scan tool MB991958, diagnose the CAN bus line. (checking the CAN box unit for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect CAN box unit connector C-13.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Check intermediate connector C-17, and repair if necessary. If the intermediate connector is in good condition, repair the wiring harness between joint connector (CAN1) C-103 and CAN box unit connector C-13.

NO Check CAN box unit connector C-13, and repair if necessary. If the CAN box unit connector is in good condition, replace the CAN box unit.

STEP 52. Using scan tool MB991958, diagnose the CAN bus line. (checking the satellite radio tuner for internal failure)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Disconnect satellite radio tuner connector C-111.





(2)Connect scan tool MB991958 to the data link connector.
(3)Turn the ignition switch to the "ON" position.





(4)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES Repair the wiring harness between joint connector (CAN1) C-103 and satellite radio tuner connector C-111.

NO Check satellite radio tuner connector C-111, and repair if necessary. If the satellite radio tuner connector is in good condition, replace the satellite radio tuner.

STEP 53. Using scan tool MB991958, diagnose the CAN bus line. (trouble symptom check)

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.





(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.





(3)Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q. Does scan tool MB991958 screen correspond to the illustration?

YES The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).

NO Check the ETACS-ECU connector C-301, and repair if necessary. If the ETACS-ECU connector is in good condition, replace the ETACS-ECU.

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