Precaution
Component partsSymptom diagnosis
HEATER AND AIR CONDITIONING SYSTEM CONTROL SYMPTOMS
Diagnosis Chart By Symptom
NOTE:
Perform the self-diagnoses with CONSULT before performing the symptom diagnosis.
If DTC is detected, perform
the corresponding diagnosis.
Symptom
Corresponding malfunction part
Refere ...
P0420 three way catalyst function
DTC Description
DTC DETECTION LOGIC
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen sto ...
DTC/circuit diagnosis
U1000 CAN COMM CIRCUIT
WITH INTELLIGENT KEY
WITH INTELLIGENT KEY : Description
Refer to LAN-8, "System Description".
WITH INTELLIGENT KEY : DTC Logic
DTC DETECTION LOGIC
NOTE:
U1000 can be set if a module harness was disconnected and reconnected, perhaps
during a repair. Confirm
...