COMPONENTS
ILLUSTRATION
RemovalCatalyst System Efficiency Below Threshold (Bank 1) (P0420)
MONITOR DESCRIPTION
The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter
(TWC) to monitor its efficiency.
The first sensor, the air fuel ratio sensor, sends pre-catalyst information to
the ECM. The second sensor, the heat ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) When troubleshooting On-Board Diagnostic (OBD II) vehicles, the vehicle must
be connected to the OBD II scan tool (complying with SAE J1987). Various data output
from the vehicle TCM can then be read.
(b) OBD II regul ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE TAIL AND STOP LIGHT BULB
(a) Turn the tail and stop light bulb and the rear combination light
socket and wire in the direction indicated by the arrow shown in the illustration,
and remove them as a unit.
...