A. Vehicles Without Drive Authorization System (DAS)
A limited number of early Model Year 1996 model 140 and 210 vehicles were produced without DAS. In these vehicles, both the engine control module (HFM-SFI [N3/4], ME-SF [N3/10], or IFI [N3/7]) and the IRCL control module (N54) are different from the versions used in vehicles equipped with DAS.
Effective Serial Number
As of the chassis numbers listed (approx. 9/95), the engine control module (HFM-SFI, ME-SFI, or F1) and remote central locking (IRCL) control modules installed in production may be different from the standard version having DAS. (The vehicles with these differences are positively identified by locking vehicle with IRCL remote control from the inside of the vehicle, if the vehicle does not start it is equipped with DAS. On new vehicles, a $ 475 credit is shown on the Monroney label if the vehicle is NOT equipped with DAS.)
The ending VIN's for this change have not yet been established, as the program remains in effect at the factory.
Hand-Held Tester (HHT) Diagnosis
The following DTC's are set, and cannot be erased, on vehicles not equipped with DAS (verified as mentioned in subject A):
IRCL B1102, B1703
HFM-SFI 116
ME-SFI P1 570
Additionally, in the HFM-SFI, ME-SFI and IFI systems, the Actual Values for the DAS system should be ignored and the "Identification" procedure (refer to "Operational Description of DAS", subject B) cannot be performed.
Remote Central Locking (IRCL) Control Module (N54) Notes
In event the HHT cannot access the version coding menu (error message: the vehicle is locked via IRCL) after replacing the IRCL module (N54), access can be restored by performing the version coding on the engine control module. Enter the version coding screen for the engine control module, write down the information and perform all steps as if the module was being replaced. Enter the version code (also available from the parts microfiche/EPC) and VIN (without the WDB) as directed and answer Yes to "Perform Identification?". Once this step is completed, the IRCL version coding can be performed. When performing diagnosis according to the Diagnostic Manual (Body & Accessories, Volume 1, Section 4.5), first check the part number of the IRCL control module (N54) using the HHT. If part number 210 820 28 26 is installed, diagnosis differs as follows:
^ The red and green feedback lamps flash only once alternately, not for 30 seconds when the vehicle is locked, as described in chapter 11 of the Diagnostic Manual.
^ Data is not transmitted between the engine control module and IRCL as described in chapter 12.
^ The engine control module and IRCL module are not connected via CAN as described in chapter 21.
^ The following test steps are not valid:
Chapter 11, steps 5.0 and 6.0 Chapter 23, steps 21.0 through 30.0
Note:
If the IRCL control module is identified as 210 820 27 26, these differences do not apply. When replacing only the IRCL control module (i.e. not in conjunction with the engine control module), order the same part number as is installed in the vehicle. As these modules are programmed to the specific VIN, delivery may take 2-3 weeks. When replacing the engine control module, please refer to the procedure below.
Replacing Engine Control Module
In the event an engine control module must be replaced in a vehicle produced without DAS (verified as mentioned in subject A), a new engine control module with a different part number, along with a new IRCL control module, also with a different part number (210 820 27 26) coded to the specific VIN, must be ordered. Both control modules must be replaced simultaneously. Refer to the parts microfiche/EPC to determine the correct replacement parts.
Note:
Installation of the new IRCL and engine control module will result in equipping the vehicle with DAS.
Removing and Installing IRCL control module.
(Model 210 shown. In Model 140, IRCL module located high in right upper corner of passenger footwell, forward of passenger A/C vent, against firewall.)
Note:
This procedure is only necessary when replacing the IRCL control module in conjunction with the engine control module. When replacing only the IRCL module, use all original connectors.
1. Press down on locking tab (1, Figure 1) and slide lock (2) to the side.
2. Disconnect 2-pole connector (3, Figure 1) from IRCL control module (N54), insulate and tie back (this connector is no longer used). Remove main IRCL connector
3. Remove original IRCL control module (part no. 210 820 2826) and install new IRCL control module (part no. 210 820 2726). Connect main IRCL connector.
4. Expose the 2-pole CAN bus connector (5, Figure 2) which is tied back in the area of the IRCL control module, or beneath the module box. This connector looks like the one removed in Step 2, but has a terminating resistor plug on it.
5. Disconnect the bus terminating resistor plug (4, Figure 2) from the 2-pole CAN Bus connector and discard.
6. Connect the 2-pole CAN Bus connector (5, Figure 2) to the new IRCL control module.
7. Perform variant coding of the IRCL control module via the HHT. In event the HHT does not access the version coding menu, refer to IRCL Control Module Notes under subject A.
8. After installing new engine control module, perform version coding, enter VIN, and perform "identification procedure". Verify that vehicle starts when unlocked, and does not start when locked with IRCL or key.