DTC P1642:00 [MZ-CD 1.6]

id0102g8348300

DTC P1642:00

CAN Link PCM/PCM Circuit/Network problem
DETECTION CONDITION
•  The PCM monitors the fuel cut condition. If fuel cut cannot be performed with any of the following conditions met, the PCM determines that there is a malfunction in the CAN Link PCM/PCM Circuit/Network problem.
―  No change in CAN signal from DSC HU/CM
―  Malfunction detected in DSC HU/CM or EHPAS CM
―  CAN bus-off
POSSIBLE CAUSE
•  Communication error between PCM and DSC HU/CM
•  Communication error between PCM and EHPAS CM
•  PCM, DSC HU/CM and/or EHPAS CM Bus-off
•  DSC HU/CM detects malfunction
•  EHPAS CM detects malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY STORED CAN COMMUNICATION DTC IN PCM
•  Retrieve the PCM DTC using the M-MDS.
•  Is the CAN communication DTC present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
No
Go to the next step.
4
VERIFY STORED DTC IN DSC HU/CM AND EHPAS CM
•  Retrieve the DSC HU/CM and EHPAS CM DTC using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
(See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS.)
No
Intermittent concern exists.
Go to the next step.
5
VERIFY THAT DTC P1642:00 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
No
DTC troubleshooting completed.