3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
a.
Go to " CAN Signal Inspection " procedure.
Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration,or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
Go to " CAN Signal Inspection " procedure.
Ignition ON, Engine : OFF.
TCCU connector : Connect.
Monitor signal waveform between terminal 4 & 5 of TCCU harness connector M79 and chassis ground .
Shift to N Range .
Specification : Signal Waveform & Data
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is CAN Signal display near the specified value?
YES
Fault is intermittent caused by poor contact in the sensor’s and/or TCCU’s connector or was repaired and TCCU memory was not cleared.Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
Go to " CAN Low wiring ground short Inspection " procedure.
Ignition "OFF".
TCCU connector : Disconnect.
Measure resistance between terminal 4 of TCCU harness connector M79 and chassis ground .
Specification : Approx. ∞ Ω
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Go to " CAN Low open Inspection " procedure.
NO
Check for ground to short circuit of CAN Low comm. Line.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition OFF
ECM, TCCU connector : Disconnect.
Measure resistance between terminal 4 of TCCU harness connector M79 and terminal 9 of ECM harness connector C230-1 .
Specification : Approx. 1Ω below.
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Go to " CAN High wiring ground short Inspection " procedure.
NO
Check for open circuit of CAN Low comm. Line.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition "OFF".
TCCU connector : Disconnect.
Measure resistance between terminal 5 of TCCU harness connector M79 and chassis ground .
Specification : Approx. ∞ Ω
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Go to " CAN High open Inspection " procedure.
NO
Check for ground to short circuit of CAN High comm. Line.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition OFF
ECM, TCCU connector : Disconnect.
Measure resistance between terminal 5 of TCCU harness connector M79 and terminal 10 of ECM harness connector C230-1 .
Specification : Approx. 1Ω below.
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Check for normal operation of "ECM" side.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
Check for open circuit of CAN High comm. Line.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
