E Class L4-135 2.2L SOHC VIN D TBI (1984)
Technical Service Bulletin #
181886
Date:
860310
Ignition Switch - `Power Loss' Lamp ON/DTC 13 Set
Models
All 1984-1986 Vehicles With EFI or Turbocharged Engines
Subject
I.
"Power Loss" Lamp Comes on at Start Up
II. Cold No Start
Index
DRIVEABILITY
Date
March 10, 1986
No.
18-18-86
This bulletin supersedes Technical Service Bulletin #18-02-85 REV A for the subject vehicles noted in Symptom/Condition I.
Symptom/Condition, Diagnosis & Parts Information
SYMPTOM/CONDITION
I.
1984 EFI (Non-Turbo) Vehicles Only
Upon engine start up "power loss" or "limited" lamp comes on and fault code 13 is generated. This may be due to a momentary interruption of the
ignition run J2 circuit as the ignition switch travels from the start position to the run position.
II. All EFI & Turbo (especially applicable to extreme cold weather high altitude areas)
At cold engine start up at temperatures below +10~F (-12~C) the ignition switch drops out for up to a quarter of a second, depending on temperature,
quantity, and type of switch lubricant. This drop out causes the mixture to revert to the initial starting level and further inhibits proper engine "run-up".
The engine loads up and/or "dies" immediately after start up and may not restart due to mixture being too rich.
DIAGNOSIS
I.
1984 EFI (Non-Turbo) Vehicles Only
If a fault code 13 occurs, proceed to the limp-in mode test as described in the Driveability Test Procedure manual. If the condition still exists,
proceed as follows:
NOTE:
PART I OF THIS SERVICE BULLETIN DOES NOT APPLY TO VEHICLES EQUIPPED WITH LOGIC MODULE
5226870, 5226966, OR 5226969.
II. 1984-1986 Vehicles With EFI or Turbocharged Engine
If cold no-start symptoms exist, perform the appropriate Driveability Test Procedure to verify that other conditions causing "no-start" are not present. If
the condition still exists on an initial cold crank, proceed as follows:
PARTS REQUIRED
Ignition Switch Drop-Out Package PN 4419151
Consists of:
1
Wiring Assembly - Ignition Switch Drop Out
PN 4368729
1
Time Delay Relay - 0.65 Second
PN 5227542
1
Screw - Ground
PN 6032114
1
Screw - Relay Attachment
PN 6032473