Service Manual Update - Secondary Air Supply System
85chrysler15Models
1985 Colt Vista
Subject
Service Manual UpdateSecondary Air Supply System
Index
EMISSIONS
Date
February 25, 1985
No.
25-02-85
P-593-C
The description of the secondary air supply system for the 1985 Colt Vista has been updated.
Please replace sections concerning this subject (page 25-7, publication #81-270-5012) with the following:
SECONDARY AIR SUPPLY SYSTEM
FIGURE 1 - Reed Valve Configuration (Federal):
Reed Valve - For Federal Vehicles (Figure 1)
The air injection system consists of a reed valve with a secondary air control valve and a solenoid valve, ECU, and some sensors.
The reed valve supplies secondary air into the front catalytic converter for the purpose of promoting oxidation of exhaust emissions during the engine warm-up operation and the vehicle deceleration, and heavy engine load operation zone.. The reed valve is actuated by exhaust vacuum being generated from pulsation in the exhaust manifold, and extra air is supplied into the exhaust manifold through the secondary air control valve.
The secondary air control valve is opened by the intake manifold pressure when the solenoid valve is energized by the ECU based on the information on coolant temperature, engine speed, time, throttle position, and idle position.
FIGURE 2 - Reed Valve Configuration (California):
Reed Valve - For California Vehicles (Figure 2)
The air injection system consists of a reed valve with a secondary air control valve, a solenoid valve, ECU, and some sensors.
The reed valve supplies secondary air into the front catalytic converter for the purpose of promoting oxidation of exhaust emissions during the engine warm-up operation and the vehicle deceleration.
The reed valve is actuated by exhaust vacuum being generated from pulsation in the exhaust manifold, and extra air is supplied into the exhaust manifold through the secondary air control valve.
The secondary air control valve is opened by the intake manifold pressure when the solenoid valve is energized by the ECU, based on the information on coolant temperature, engine speed, time, and idle position.
POLICY: Information only