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Multiplex Communication System: Diagnosis Mazda CX-5 I

Communication Devices 1 illustration ~1312 words

CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW

  1. If there is any vehicle malfunction complaint lodged by a customer, refer to " «FOREWORD»(ref-615395-S21465376522014051000000) " and perform CAN malfunction diagnosis following the steps in the troubleshooting procedure.

CAN Malfunction Diagnosis Flow

Note. The flowchart and the diagnosis flow of the diagnosis procedure are the same thing, and the detailed procedure of the flowchart is the diagnosis procedure. The step numbers in the flowchart indicate the step numbers of the diagnosis procedure.

CAN Malfunction Diagnosis Flow Chart. Scheme 1

Scheme 1: CAN Malfunction Diagnosis Flow Chart
Scheme 1: CAN Malfunction Diagnosis Flow Chart
StepInspectionAction
1INSPECT IF COMMUNICATION BETWEEN WIMPS AND PCM IS POSSIBLE Connect the M-MDS (IDS) to the DLC-2. Switch the ignition ON. Perform vehicle identification. Can the vehicle be identified?YesGo to the next step.
NoGo to Step 5 as a malfunction in the HS-CAN circuit has occurred.
2INSPECT MODULE FOR INABILITY TO COMMUNICATE DUE TO CAN MALFUNCTION Implement the network test using the M-MDS (IDS). (See NETWORK TEST ). Is there a module indicating a malfunction?YesGo to Step 14 as a malfunction in the CAN circuit has occurred.
NoGo to the next step.
3INSPECT FOR SHORT TO POWER SUPPLY IN CAN_H SIDE OF MS-CAN OR HS-CAN Measure the voltage between the following terminals: Between DLC-2 terminal F (CAN_H side of HS CAN) and body ground Between DLC-2 terminal L (CAN_H side of MS CAN) and body ground Is B+ voltage measured between any of the terminals? NOTE: If a short to power supply other than the B+ power supply has occurred, a constant voltage other than B+ can be measured.YesA short to power supply in the CAN_H side of MS-CAN or HS-CAN. Determine the location of the short to power supply according to the diagnosis procedure for determining the location of a short to power supply. (See DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN) ). (See DETERMINING SHORT TO POWER SUPPLY LOCATION (MS-CAN) ).
NoGo to the next step.
4INSPECT FOR SHORT TO GROUND IN CAN_L SIDE OF HS-CAN OR MS-CAN Measure the voltage between the following terminals: Between DLC-2 terminal E (CAN_L side of HS-CAN) and ground Between DLC-2 terminal K (CAN_L side of MS-CAN) and ground Is the voltage measured as 0 V?YesA short to ground on the CAN_L side of the HS-CAN or MS-CAN has occurred. Determine the location of the short to ground according to the diagnosis procedure for determining the location of a short to ground. (See DETERMINING SHORT TO GROUND LOCATION (HS-CAN) ). (See DETERMINING SHORT TO GROUND LOCATION (MS-CAN) ).
NoThe current CAN circuit is normal, return to FOREWORD, and go to the next step of the CAN malfunction diagnosis in the troubleshooting procedure. (See FOREWORD ).
5VERIFY IF VEHICLE UNDER DIAGNOSIS IS EQUIPPED WITH ADVANCED PUSH START SYSTEM. Is the vehicle equipped with the advanced push start system?YesGo to the next step.
NoGo to Step 7.
6VERIFY IF ADVANCED PUSH START SYSTEM HAS MALFUNCTION Switch the ignition ON. Can the ignition be switched ON?YesGo to the next step.
NoA malfunction in the advanced push start system has occurred. Perform diagnosis according to the symptom troubleshooting.
7INSPECT FOR MALFUNCTION IN M-MDS Connect the M-MDS (IDS) to a normal vehicle and implement vehicle identification. Can the vehicle be identified?YesGo to the next step.
NoA malfunction in the M-MDS (IDS) can be considered. Repair the M-MDS (IDS).
8INSPECT HS-CAN FOR SHORT TO POWER SUPPLY Measure the voltage between the following terminals: Between DLC-2 terminal F (CAN_H side) and body ground Between DLC-2 terminal E (CAN_L side) and body ground Is B+ voltage measured between any of the terminals? NOTE: If a short to power supply other than the B+ power supply has occurred, a constant voltage other than B+ can be measured.YesA short to power supply in the CAN_H side or CAN_L of HS-CAN has occurred. Determine the location of the short to power supply according to the diagnosis procedure for determining the location of a short to power supply. (See DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN) ).
NoGo to the next step.
9INSPECT HS-CAN FOR OPEN CIRCUIT Measure the voltage between the following terminals: Between DLC-2 terminal F (CAN_H side) and body ground Between DLC-2 terminal E (CAN_L side) and body ground Is the voltage between both terminals (CAN_H side and CAN_L side) equal?YesGo to Step 13 as a short to ground or a short between circuits has occurred in the HS-CAN.
NoGo to the next step.
10VERIFY IF VEHICLE UNDER DIAGNOSIS IS EQUIPPED WITH IMMOBILIZER SYSTEM Is the vehicle equipped with the immobilizer system?YesGo to the next step.
NoGo to Step 12.
11DETERMINE IF OPEN CIRCUIT LOCATION IN HS-CAN CIRCUIT IS BETWEEN DLC AND CONNECTOR C-35 OR ELSEWHERE Start the engine. Can the engine be started?YesGo to Step 12.
NoAn open circuit has occurred between the PCM and connector C-35 in the HS-CAN. Determine the location of the open circuit according to the diagnosis procedure for determining the location of an open circuit. (See DETERMINING OPEN CIRCUIT LOCATION (HS-CAN) ).
12DETERMINE IF OPEN CIRCUIT LOCATION IN HS-CAN CIRCUIT IS BETWEEN DLC AND CONNECTOR C-35 OR ELSEWHERE Switch the ignition ON. Verify if the check engine light in the instrument cluster illuminates. Start the engine. Verify if the check engine light turns off. Does the check engine light turn off?YesAn open circuit between DLC-2 and connector C-35 has occurred. Repair or replace the wiring harness for an open circuit, then return to Step 1.
NoAn open circuit has occurred between the PCM and connector C-35 in the HS-CAN. Determine the location of the open circuit according to the diagnosis procedure for determining the location of an open circuit. (See DETERMINING OPEN CIRCUIT LOCATION (HS-CAN) ).
13VERIFY MALFUNCTION OCCURRED IN HS-CAN CIRCUIT Measure the voltage between the following terminals: Between DLC-2 terminal F (CAN_H side) and body ground Between DLC-2 terminal E (CAN_L side) and body ground Is the voltage between both terminals (CAN_H side and CAN_L side) 0 V?YesA short to ground in CAN_H side of HS-CAN has occurred. Determine the location of the short to ground according to the diagnosis procedure for determining the location of a short to ground. (See DETERMINING SHORT TO GROUND LOCATION (HS-CAN) ).
NoA short between circuits in the CAN_H side and the CAN_L side of HS-CAN has occurred. Determine the location of the short between circuits according to the diagnosis procedure for determining the location of a short between circuits. (See DETERMINING SHORT BETWEEN CIRCUITS LOCATION (HS-CAN) ).
14DETERMINE CAN COMMUNICATION SPECIFICATION IN WHICH MALFUNCTION OCCURS Refer to the CAN communication specification quick reference table and verify the CAN communication specification (HS-CAN or MS-CAN) that is connected to the module which is indicating a malfunction. (See CAN COMMUNICATION SPECIFICATION QUICK REFERENCE TABLE ). Is the module that is indicating a malfunction HS-CAN?YesAn open circuit in the HS-CAN has occurred. Determine the location of the open circuit according to the diagnosis procedure for determining the location of an open circuit. (See DETERMINING OPEN CIRCUIT LOCATION (HS-CAN) ).
NoGo to the next step.
15INSPECT CAN_L SIDE OF MS-CAN FOR SHORT TO POWER SUPPLY Measure voltage between DLC-2 terminal K (CAN_L side) and body ground. Can B+ voltage be measured? NOTE: If a short to power supply other than the B+ power supply has occurred, a constant voltage other than B+ can be measured.YesA short to power supply in the CAN_L side of the MS-CAN has occurred. Determine the location of the short to power supply according to the diagnosis procedure for determining the location of a short to power supply. (See DETERMINING SHORT TO POWER SUPPLY LOCATION (MS-CAN) ).
NoGo to the next step.
16INSPECT MS-CAN FOR OPEN CIRCUIT Measure the voltage between the following terminals: Between DLC-2 terminal L (CAN_H side) and body ground Between DLC-2 terminal K (CAN_L side) and body ground Is the voltage between both terminals (CAN_H side and CAN_L side) equal?YesGo to the next step.
NoOpen circuit in MS-CAN has occurred. Determine the location of the open circuit according to the diagnosis procedure for determining the location of an open circuit. (See DETERMINING OPEN CIRCUIT LOCATION (MS-CAN) ).
17VERIFY MALFUNCTION OCCURRED IN MS-CAN Measure the voltage between the following terminals: Between DLC-2 terminal L (CAN_H side) and body ground Between DLC-2 terminal K (CAN_L side) and body ground Is the voltage between both terminals (CAN_H side and CAN_L side) equal?YesA short to ground in the CAN_H side of the MS-CAN has occurred. Determine the location of the short to ground according to the diagnosis procedure for determining the location of a short to ground. (See DETERMINING SHORT TO GROUND LOCATION (MS-CAN) ).
NoA short between circuits on the CAN_H side and CAN_L side of MS-CAN has occurred. Determine the location of the short between circuits according to the diagnosis procedure for determining the location of a short between circuits. (See DETERMINING SHORT BETWEEN CIRCUITS LOCATION (MS-CAN) ).
NOTE
If a short to power supply other than the B+ power supply has occurred, a constant voltage other than B+ can be measured.
NOTE
If a short to power supply other than the B+ power supply has occurred, a constant voltage other than B+ can be measured.
NOTE
If a short to power supply other than the B+ power supply has occurred, a constant voltage other than B+ can be measured.

DIAGNOSTIC PROCEDURE DESCRIPTION

CAN communication related module (M-MDS display)CAN communication specification
HS-CANMS-CAN
PCM (PCM)X
DSC HU/CM (ABS)X
TCM (TCM)X
AFS control module (AFS)X
Front body control module (FBCM) (F_BCM)X
AWD control module (4x4)X
Start stop unit (SSU)X
EPS control module (EPS)X
SAS control module (RCM)X
Instrument cluster (IC)X
Rear body control module (RBCM) (R_BCM)X
BSM control module (LH) (BSML)X
BSM control module (RH) (BSMR)X
Sirius satellite radio unitX
ClockX
Climate control unit (EATC)X
Audio unit (ACU)X

CAN COMMUNICATION SPECIFICATION QUICK REFERENCE TABLE

NETWORK TEST

  1. Connect the M-MDS (IDS) to the DLC-2.
  2. After the vehicle is identified, select the "NETWORK TEST" from the initialization screen of the IDS.
  3. Verify the unit with a communication error according to the directions on the screen.

DTC TABLE

CAUTIONIf there is any vehicle malfunction complaint lodged by a customer, refer to " FORWARD " and perform CAN malfunction diagnosis following the steps in the troubleshooting procedure. (See FOREWORD ).

DTC Output Pattern and Malfunctioning Location

Cross (x): Communication error-related DTC and failed module
M-MDS displayDTC output pattern and malfunctioning location
DTC output moduleDTC
PCM (PCM)U0101:00X
U0121:00X
U0131:00X
U0140:00X
U0151:00X
U0155:00X
U0214:00X
ABS (DSC HU/CM)U0100:00X
U0101:00X
U0114:00X
U0131:00X (5)X (4)
U0155:00X
TCM (1) (TCM)U0100:00XX
U0121:00XX
U0141:00X
U0155:00X
AFS (2) (AFS control module)U0100:00XXX
U0131:00X
U0140:00X
U0155:00X
F_BCM (Front body control module (FBCM))U0100:00XXX
U0101:00XX
U0121:00XXX
U0155:00X
U0214:00X
U0515:00X
4X4 (3) (AWD control module)U0100:00XXXX
U0101:00XXX
U0121:00XXXX
SSU (Start stop unit)U0100:00XXXXX
U0101:00XXXX
U0121:00XXXXX
U0121:87XXXXX
U0131:00X
U0140:00XXX
U0146:00X
U0151:00X
U0155:00X
EPS (EPS control module)U0100:00XXXXX
U0121:00XXXXX
U0155:00X
RCM (SAS control module)U0155:00X
IC (Instrument cluster)U0100:00XXXXX
U0101:00XXXX
U0114:00XX
U0121:00XXXXX
U0131:00X
U0140:00XXX
U0151:00X
U0182:00XXX
U0214:00X
M-MDS display module[Fail] display pattern
PCMXXXXX
ABSXXXXX
TCM (1)XXXX
AFS (2)XXX
F_BCMXXX
4X4 (3)XX
SSUX
EPSX
RCMX
ICX
Diagnostic result
Possible cause and inspection itemABCDEFGHIJKLMN
(1) ATX vehicles (2) With AFS system (3) AWD vehicles (4) Without steering angle sensor (5) With steering angle sensor
(1)ATX vehicles
(2)With AFS system
(3)AWD vehicles
(4)Without steering angle sensor
(5)With steering angle sensor

Inspection item

  1. PCM connector
  2. Connector C-32
  3. Wiring harness between PCM terminal 2AK and connector C-32
  4. Wiring harness between PCM terminal 2AL and connector C-32
  5. PCM
  1. DSC HU/CM connector
  2. Connector C-32
  3. Wiring harness between DSC HU/CM terminal AF and connector C-32
  4. Wiring harness between DSC HU/CM terminal AC and connector C-32
  5. DSC HU/CM
  1. Connector C-32
  2. Connector C-01
  3. Wiring harness between connectors C-32 and C-01
  4. Wiring harness between connector C-01 and branch A
  1. Front body control module (FBCM) connector
  2. Connector C-32
  3. Connector C-01
  4. Wiring harness between connectors C-32 and C-01
  5. Wiring harness between connectors C-01 and C-01
  6. Wiring harness between front body control module (FBCM) terminal 2P and connector C-01
  7. Wiring harness between front body control module (FBCM) terminal 2N and connector C-01
  8. Front body control module (FBCM) Between front body control module (FBCM) terminal 2P and front body control module (FBCM) terminal 2K Between front body control module (FBCM) terminal 2N and front body control module (FBCM) terminal 2I
  1. TCM connector
  2. Wiring harness between TCM terminal E and branch A
  3. Wiring harness between TCM terminal F and branch A
  4. TCM
  1. Front body control module (FBCM) connector
  2. Connector C-01
  3. Wiring harness between branch A and connector C-01
  4. Wiring harness between front body control module (FBCM) terminal 2P and connector C-01
  5. Wiring harness between front body control module (FBCM) terminal 2N and connector C-01
  6. Front body control module (FBCM) Between front body control module (FBCM) terminal 2P and front body control module (FBCM) terminal 2K Between front body control module (FBCM) terminal 2N and front body control module (FBCM) terminal 2I
  1. Front body control module (FBCM) connector
  2. AFS control module connector
  3. Wiring harness between front body control module (FBCM) terminal 2R and AFS control module terminal A
  4. Wiring harness between front body control module (FBCM) terminal 2L and AFS control module terminal B
  5. Front body control module (FBCM) Between front body control module (FBCM) terminal 2R and front body control module (FBCM) terminal 2K Between front body control module (FBCM) terminal 2L and front body control module (FBCM) terminal 2I
  1. Front body control module (FBCM)
  1. Front body control module (FBCM) connector
  2. Connector C-04
  3. Connectors C-49, C-50
  4. Wiring harness between front body control module (FBCM) terminal 2K and connector C-04
  5. Wiring harness between front body control module (FBCM) terminal 2I and connector C-04
  6. Wiring harness between connectors C-04 and C-49, C-50
  7. Front body control module (FBCM) Between front body control module (FBCM) terminal 2P and front body control module (FBCM) terminal 2K Between front body control module (FBCM) terminal 2N and front body control module (FBCM) terminal 2I
  1. Front body control module (FBCM) connector
  2. Connector C-04
  3. Connector C-10
  4. Connector C-35
  5. Wiring harness between front body control module (FBCM) terminal 2K and connector C-04
  6. Wiring harness between front body control module (FBCM) terminal 2I and connector C-04
  7. Wiring harness between connectors C-04 and C-10
  8. Wiring harness between connectors C-10 and C-35
  9. Front body control module (FBCM) Between front body control module (FBCM) terminal 2P and front body control module (FBCM) terminal 2K Between front body control module (FBCM) terminal 2N and front body control module (FBCM) terminal 2I
  1. AWD control module connector
  2. Connectors C-49, C-50
  3. Wiring harness between AWD control module terminal G and connector C-49
  4. Wiring harness between AWD control module terminal H and connector C-50
  5. AWD control module
  1. Connectors C-49, C-50
  2. Connector C-10
  3. Connector C-35
  4. Wiring harness between connectors C-49, C-50 and connector C-10
  5. Wiring harness between connectors C-10 and C-35
  1. Start stop unit connector
  2. Connector C-35
  3. Wiring harness between start stop unit terminal 2M and connector C-35
  4. Wiring harness between start stop unit terminal 2O and connector C-35
  5. Start stop unit
  1. EPS control module connector
  2. Connector C-35
  3. Wiring harness between EPS control module terminal 2A and connector C-35
  4. Wiring harness between EPS control module terminal 2D and connector C-35
  5. EPS control module
WARNINGHandling the component parts of the SRS air bag system improperly can accidentally operate (deploy) the air bag module, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components of the SRS air bag system. (See AIR BAG SYSTEM SERVICE WARNINGS [TWO-STEP DEPLOYMENT CONTROL SYSTEM] ). (See AIR BAG SYSTEM SERVICE WARNINGS [STANDARD DEPLOYMENT CONTROL SYSTEM] ). (See AIR BAG SYSTEM SERVICE CAUTIONS [TWO-STEP DEPLOYMENT CONTROL SYSTEM] ). (See AIR BAG SYSTEM SERVICE CAUTIONS [STANDARD DEPLOYMENT CONTROL SYSTEM] ).
  1. SAS control module connector
  2. Connector C-35
  3. Wiring harness between SAS control module terminal 3K and connector C-35
  4. Wiring harness between SAS control module terminal 3L and connector C-35
  5. SAS control module
  1. Instrument cluster connector
  2. Connector C-35
  3. Wiring harness between instrument cluster terminal B and connector C-35
  4. Wiring harness between instrument cluster terminal D and connector C-35
  5. Instrument cluster
Cross (x): Displayed
M-MDS displayDTC output pattern and malfunctioning location
DTC output moduleDTC
R_BCM (Rear body control module (RBCM))U0155:00X
BSML (1) (BSM control module (LH))U0100:00X
U0131:00X
U0155:00X
U0214:00X
U0233:00X
BSMR (1) (BSM control module (RH))U0100:00X
U0131:00X
U0155:00X
U0214:00X
U0232:00XX
EATC (2) (Climate control unit)U0155:00X
ACU (3) (Audio unit)U0155:00X
IC (Instrument cluster)U0142:00XX
U0233:00XX
M-MDS display module[Fail] display pattern
R_BCMXX
BSML (1)XXX
BSMR (1)XX
EATC (2)X
ACU (3)X
ICX
Diagnostic result
Possible cause and inspection itemABCDEFGH
(1) With BSM (2) With full-auto air conditioner (3) With audio unit
(1)With BSM
(2)With full-auto air conditioner
(3)With audio unit
  1. BSM control module (LH) connector
  2. Connector C-23
  3. Wiring harness between BSM control module (LH) terminal H and connector C-23.
  4. Wiring harness between BSM control module (LH) terminal G and connector C-23
  5. Wiring harness between rear body control module (RBCM) terminal 41 and connector C-23
  6. Wiring harness between rear body control module (RBCM) terminal 4L and connector C-23
  7. BSM control module (LH)
  8. Rear body control module (RBCM) Between rear body control module (RBCM) terminal 4G and rear body control module (RBCM) terminal 4I Between rear body control module (RBCM) terminal 4J and rear body control module (RBCM) terminal 4L
  1. Rear body control module (RBCM) connector
  2. Connectors C-47, C-48
  3. Wiring harness between rear body control module (RBCM) terminal 4G and connectors C-47
  4. Wiring harness between rear body control module (RBCM) terminal 4J and connectors C-48
  5. Rear body control module (RBCM) Between rear body control module (RBCM) terminal 4G and rear body control module (RBCM) terminal 41 Between rear body control module (RBCM) terminal 4J and rear body control module (RBCM) terminal 4L
  1. Rear body control module (RBCM) connector
  2. Connector C-14
  3. Connector C-08
  4. Connector C-34
  5. Wiring harness between rear body control module (RBCM) terminal 4G and connector C-14
  6. Wiring harness between rear body control module (RBCM) terminal 4J and connector C-14
  7. Wiring harness between connector C-14 and connector C-08
  8. Wiring harness between connector C-08 and connector C-34
  9. Rear body control module (RBCM)
  1. BSM control module (RH) connector
  2. Connectors C-47, C-48
  3. Wiring harness between BSM control module (RH) terminal H and connector C-47
  4. Wiring harness between BSM control module (RH) terminal G and connector C-48
  5. BSM control module (RH)
  1. Connectors C-47, C-48
  2. Connector C-14
  3. Connector C-08
  4. Connector C-34
  5. Wiring harness between connectors C-47, C-48 and connector C-14
  6. Wiring harness between connector C-14 and connector C-08
  7. Wiring harness between connector C-08 and connector C-34
  1. Climate control unit connector
  2. Connector C-34
  3. Wiring harness between climate control unit terminal 1S and connector C-34
  4. Wiring harness between climate control unit terminal 1U and connector C-34
  5. Climate control unit
  1. Audio unit connector
  2. Connector C-34
  3. Wiring harness between audio unit terminal 1O and connector C-34
  4. Wiring harness between audio unit terminal 1Q and connector C-34
  5. Audio unit
  1. Instrument cluster connector
  2. Connector C-34
  3. Wiring harness between instrument cluster terminal C and connector C-34
  4. Wiring harness between instrument cluster terminal E and connector C-34
  5. Instrument cluster

H

  1. Perform the clock input/output check mode. (See «CLOCK INPUT/OUTPUT CHECK MODE»(ref-615411-S32148796242014051000000) ). "2:00" is displayed (See «SIRIUS SATELLITE RADIO UNIT CIRCUIT MALFUNCTION»(ref-615395-S07791225132014051000000) ). "2:Er" is displayed (See «CLOCK CIRCUIT MALFUNCTION»(ref-615395-S07225693952014051000000) ).
  1. SIRIUS satellite radio unit connector
  2. Connector C-34
  3. Wiring harness between SIRIUS satellite radio unit terminal L and connector C-34
  4. Wiring harness between SIRIUS satellite radio unit terminal K and connector C-34
  5. SIRIUS satellite radio unit
  1. Clock component connector
  2. Connector C-34
  3. Wiring harness between clock component terminal E and connector C-34
  4. Wiring harness between clock component terminal G and connector C-34
  5. Clock component

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