Purge Valve
Accelerator PedalCatalyst 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 ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful bec ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT STARTER ASSEMBLY
NOTICE:
These tests must be performed within 3 to 5 seconds to avoid burning out the
coil.
(a) Perform a pull-in test.
(1) Remove the nut and disconnect the lead wire from terminal C.
(2) Con ...