Replacement Of Secondary Air Injection Relay Module (94-0411)
Publication date: 1994-04-01Reference number: 94-0411
REPLACEMENT OF SECONDARY AIR INJECTION RELAY MODULE
TECHNICAL SERVICE BULLETIN
MODEL 202.022
94-0411 REPLACEMENT OF SECONDARY AIR INJECTION (AIR) RELAY MODULE (K17) AND PUMP (M33)
Model(s): 1994 Mercedes-Benz C220
Group: 00 Of Service Information Binder I Of Information - Parts & Accessories Binder
Campaign No.: 94-0411
Date: April 1994
ILLUSTRATIONS
SERVICE INFORMATION
Service Campaign 94-0411 is initiated because MBAG has determined that in vehicles within the Effective Serial Number Range below, the secondary air injection (AIR) relay module (K17) and secondary air injection (AIR) pump (M33) may fail.
Therefore, in vehicles within the Effective Serial Number Range below, the secondary air injection (AIR) pump must be replaced and the secondary air injection (AIR) relay module must be replaced if the production date stamped on the relay module is prior to 21.10.93.
| Model | Engine | From Chassis Number | To Chassis Number |
|---|---|---|---|
| 202.022 | 111.961 | 000001 | 046189 |
See attached WORK INSTRUCTIONS 310 , Groups 14, 30.
WORK INSTRUCTIONS 310
MODEL 202.022
94-0411 REPLACEMENT OF SECONDARY AIR INJECTION (AIR) RELAY MODULE (K17) AND PUMP (M33)
Model(s): 1994 Mercedes-Benz C220
Groups: 14, 30
Number: 310
Date: April 1994
SERVICE INFORMATION
In vehicles within the Effective Serial Number Range below. the secondary air injection (AIR pump (M33) must be replaced and the secondary air injection (AIR) relay module (K17) must be replaced if the production date stamped on the relay module is prior to 21.10.93.
This procedure must be performed during the vehicles next scheduled maintenance or repair.
94-0411 - REPLACEMENT OF SECONDARY AIR INJECTION (AIR) RELAY MODULE (K17) AND PUMP (M33)
| Model | Engine | From Chassis Number | To Chassis Number |
|---|---|---|---|
| 202.022 | 111.961 | 000001 | 046189 |
REPLACEMENT OF MODULE (K17)
- Remove previous version secondary air injection relay module (K17) from fuse box and replace with new version (stamped with production date 21.10.93 or later). See Fig 1
- Mark the new version relay module with a white paint dot for identification purposes.
REPLACEMENT OF PUMP (M33)
- Disconnect battery ground cable.
- Remove (plastic) front engine cover.
- Unplug secondary air injection pump electrical connector and unbolt air pump ground wire.
- Loosen poly-V-belt and slide off generator pulley.
- Remove generator bolt securing secondary air injection pump harness clamp.
- Lift vehicle.
- Remove lower encapsulation panel.
- Remove secondary air injection pump hose at pump.
- Replace secondary air injection pump (M33) with modified version. See Fig 2 .
- Mark the new version pump with a white paint dot for identification purposes.
- Connect electrical connector to harness and reinstall bolt previously mentioned in step 3 (which bolted the ground wire to the front of the cylinder head).NOTE: The ground wire for the new version air pump is located inside the pump's electrical connector and is no longer separately bolted to front of the cylinder head.
- Further installation is in reverse order of removal.
- Erase engine codes using Hand-Held Tester (HHT).
- Activate secondary air injection pump with HHT and check readings according to HHT display.