Diagnosis Procedure
1.CONNECTOR INSPECTION
2.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector terminals.

3.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.

4.CHECK ECM AND IPDM E/R TERMINATION CIRCUIT


3. Check the resistance between the IPDM E/R terminals.

5.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the "Symptom (Results from interview with customer)" are reproduced.
Inspection result Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.
6.CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
NOTE: ECM and IPDM E/R have a termination circuit. Check other units first.
NOTE: Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
TCM branch line circuit
DTC/circuit diagnosisDoor lock function symptoms
DOOR LOCK AND UNLOCK SWITCH
DOOR LOCK AND UNLOCK SWITCH : Symptom Table
DOOR LOCK/UNLOCK FUNCTION MALFUNCTION
NOTE:
Before performing the diagnosis in the following table, check
"WORK FLOW". Refer to DLK-9, "Work Flow".
Check that vehicle is under the condition shown in "Condi ...
Front fog lamp
System Diagram
System Description
BCM (Body Control Module) controls front fog lamp operation.
IPDM E/R (Intelligent Power Distribution Module Engine Room) operates
front fog lamp according to CAN communication signals from BCM.
Combination meter operates front fog lamp indicator accor ...
B2268 water temp
Description
The engine coolant temperature signal is transmitted from ECM to the
combination meter via CAN communication.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS OF ECM
Perform "Self Diagnosis Result" of ECM, and repair or replace malfunctioning
parts.
...