Emissions - Multiple Codes Set/MIL ON
Date: March 13, 2009
Order No.: S-B-14.30/15f
Supersedes: S-B-14.30/15e dated Nov. 11, 1008
Group: 14
Revision History
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 374
SUBJECT
Check Engine Light with DTC P2003, P2047, P0810 and P0814 Stored in Engine ECU
If you receive customer reports in the above model vehicles of the check engine light coming on and codes P2003 (M112, M113, M275), P2047
(M271), P0810 (M272, M273), P0814 (M272, M273) are stored in the engine control module memory, please perform the below procedure.
1. Air Pump Relay
Valid for Models shown above.
This condition may be caused by a malfunctioning air pump relay. When the secondary air pump relay malfunctions, the air pump may be actuated
beyond the maximum permissible operating time. This overload may lead to failure of the secondary air injection pump and results in a malfunction
in the secondary air injection system. Proceed as follows:
Note:
If diagnosis reveals a malfunctioning air injection pump, refer to step 1.2.
1.1 Test the secondary air injection function chain with SDS.
1.2 If the secondary air pump is determined to be defective remove/replace secondary air pump and air pump relay (refer to WIS document:
AR14.30-P-7251QB).
1.3 If it is determined that only the relay is defective, replace the relay only and retest the secondary air injection function chain with SDS.
1.4 Program engine control module.
2. Check Valve for Vacuum Actuation of Air Pump
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 375
Valid for Models shown above.
This condition may be caused by a malfunctioning check valve in the vacuum line (Figure 1) to the air pump switch over valve. When the check
valve malfunctions, vacuum flow to the diverter valve is restricted preventing it from opening. Proceed as follows.
2.1 Test the secondary air injection function chain with SDS.
2.2 If the air pump can be activated with SDS but the function chain test fails, the vacuum flow between the air pump switchover valve and the
diverter valve may be restricted preventing the diverter valve from opening.
2.3 Check vacuum supply (Figure 2) at the diverter valve. If vacuum is < 500mbar, change check valve.
Note:
Copy of the SDS short test and all tests performed must accompany returned parts. If the documentation is missing or does not support the diagnosis,
the warranty claim may be debited.
Note:
When ordering a replacement relay order the part number of the relay being removed. The parts system will deliver the current version of the
ordered part.
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 376
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
March 13, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 377
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 378
In Case of Warranty, use the table above.
Date: March 13, 2009
Order No.: S-B-14.30/15f
Supersedes: S-B-14.30/15e dated Nov. 11, 1008
Group: 14
Revision History
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 374
SUBJECT
Check Engine Light with DTC P2003, P2047, P0810 and P0814 Stored in Engine ECU
If you receive customer reports in the above model vehicles of the check engine light coming on and codes P2003 (M112, M113, M275), P2047
(M271), P0810 (M272, M273), P0814 (M272, M273) are stored in the engine control module memory, please perform the below procedure.
1. Air Pump Relay
Valid for Models shown above.
This condition may be caused by a malfunctioning air pump relay. When the secondary air pump relay malfunctions, the air pump may be actuated
beyond the maximum permissible operating time. This overload may lead to failure of the secondary air injection pump and results in a malfunction
in the secondary air injection system. Proceed as follows:
Note:
If diagnosis reveals a malfunctioning air injection pump, refer to step 1.2.
1.1 Test the secondary air injection function chain with SDS.
1.2 If the secondary air pump is determined to be defective remove/replace secondary air pump and air pump relay (refer to WIS document:
AR14.30-P-7251QB).
1.3 If it is determined that only the relay is defective, replace the relay only and retest the secondary air injection function chain with SDS.
1.4 Program engine control module.
2. Check Valve for Vacuum Actuation of Air Pump
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 375
Valid for Models shown above.
This condition may be caused by a malfunctioning check valve in the vacuum line (Figure 1) to the air pump switch over valve. When the check
valve malfunctions, vacuum flow to the diverter valve is restricted preventing it from opening. Proceed as follows.
2.1 Test the secondary air injection function chain with SDS.
2.2 If the air pump can be activated with SDS but the function chain test fails, the vacuum flow between the air pump switchover valve and the
diverter valve may be restricted preventing the diverter valve from opening.
2.3 Check vacuum supply (Figure 2) at the diverter valve. If vacuum is < 500mbar, change check valve.
Note:
Copy of the SDS short test and all tests performed must accompany returned parts. If the documentation is missing or does not support the diagnosis,
the warranty claim may be debited.
Note:
When ordering a replacement relay order the part number of the relay being removed. The parts system will deliver the current version of the
ordered part.
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 376
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
March 13, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 377
2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 378
In Case of Warranty, use the table above.
