4.2 LH module

[sheward]

Looking to help a friend local.
I have an LH module, no. 021 545 70 32 96 M03

Will this module work to assess His no start issue? I assume this module may have come from a 1996 W140.

Thanks.

 

[gsxr]

Looking to help a friend local.
I have an LH module, no. 021 545 70 32 96 M03

Will this module work to assess His no start issue? I assume this module may have come from a 1996 W140.

@sheward, that module part number is for a 124.034 chassis. It's the late module with expanded adaptation range for the DTC #19 issue which seemed to mostly affect vehicles in the Florida area. There's a TSB on this.

Not likely to cure a no-start issue, unless his existing LH module is defective. Need more info to troubleshoot though.

 

[sheward]

Thanks, Dave. The owner is experiencing no fuel preasure when ignition is on. 12,000 miles. He thinks pumps are OK. He's ordered a new FP relay and wants to rule out the LH module. I believe his 034 is a 92 MY.

The module must have come from a 94 034 I parted.

 

[gsxr]

Thanks, Dave. The owner is experiencing no fuel preasure when ignition is on. 12,000 miles. He thinks pumps are OK. Hes ordered a new FP relay and wants to rule out the LH module. I believe his 034 is a 92 MY. The module must have come from a 94 034 I parted.

The pumps are easy to test. Temporarily bypass the fuel pump relay by shorting the appropriate sockets with the relay removed. If the pumps run and there is normal rail pressure, and the car starts, it could be the LH module. Very unlikely to be the relay, but worth checking (also checking the fuse, if present). Also need to verify the LH module is getting power. Lots of stuff to rule out here. If he's close by, it's easy enough to swap module and see what happens.

 

[ap961145]

If he will have lH module for sale I would be interested.
Thx