Subject: CHECKING PROCEDURES LE/LU Jetronic
Injection Systems, TSD- 1476- E, Art.- Nr.91616
Vehicles: All with LE/LU Jetronic
The switch positions on the checking relay (Special Service Tool KM-566-9-1) do not correspond to the Checking Procedures.
In addition, at the beginning of the checks, the control unit is not connected to Checking Cable KM-566-9.
Therefore, the following sections of the Checking Procedures should be corrected by hand according to the points marked bold:
Page 5: OPEL Universal Checking Adapter KM-566-1,OPEL Checking Cable KM-566- 9 and Checking Relay KM-566-9-1,
Connect Remove right front side panelling.
Remove multiple plug of wiring harness from control unit.
For this, press back retaining spring on control unit, remove plug.
If necessary remove control unit.
Connect OPEL Checking Cable KM-566-9 with the male connector to the wiring harness plug (see also checking program).
Do not connect the control unit plug of the checking cable to the control unit.
Page 6: Checking Relay, Connect
For this, fuel pump relay K 31 is disconnected from the wiring plug and Checking Relay KM-566-9-1 is connected (ensure correct connection; circuit diagram).
Checking relay at switch position "0".
The checking relay has 3 switch positions:
0 = OFF
2 = Check functioning of fuel pump M 21
1 = Injection system voltage supply, without activation of fuel pump
This avoids damage to the catalytic converter (with LU Jetronic) due to frequent cold starts without ignition (caused by checking program).
Page 11:
| 6 | - | - | - | Connect control unit, | - | - | ||
|---|---|---|---|---|---|---|---|---|
| Place switch of checking | ||||||||
| relay on "2". | ||||||||
| Connect checking relay | ||||||||
| Fuel pump relay M 21 | to plug of fuel | |||||||
| pump relay K 31. | ||||||||
| Fuel pump | ||||||||
| Ignition ON | M 21 must run |
Cause of Fault, Trouble-shooting
Pump does not run:
1) Check of fuse F 16 20 A (fuel pump M 21).
2) Check voltage at fuel pump M 21 (11 ... 12.5 V),
Page 11:
| 7 | Voltmeter to W/mV- | --> | 20 | Control unit K 15 | Ignition ON | 11.5 ... 13.5 V | 9 | 5 |
|---|---|---|---|---|---|---|---|---|
| socket, 20 V - | voltage supply | Place switch of checking | ||||||
| range | relay at position "1". | |||||||
| (pump is no longer running) |
Cause of Fault, Trouble-shooting
Measurement value < 11.5 V:
1) Charge battery
2) Check pin terminal, measurement value 0 V.
Page 26:
| 5 | - | - | - | Connect control unit, | - | - | ||
|---|---|---|---|---|---|---|---|---|
| Place switch of checking | ||||||||
| relay to "2". | ||||||||
| Connect checking relay | ||||||||
| Fuel pump M 21 | to plug of fuel | |||||||
| pump relay K 31. | ||||||||
| Ignition ON | Fuel pump | |||||||
| M 21 must run. |
Cause of Fault, Trouble-shooting
Pump does not run:
1) Check of fuse F 16 20 A (fuel pump M 21).
2) Check voltage at fuel pump M 21 (11 ... 12.5 V)
Page 27:
| 7 | Voltmeter to W/mV- | --> | 20 | voltage supply | Ignition ON | 11.5 ... 13.5 V | 9 | 5 |
|---|---|---|---|---|---|---|---|---|
| socket, 20 V - | control unit K 15 | Place switch of checking | ||||||
| range | relay to position "1". | |||||||
| (Pump no longer runs) |
Cause of Fault, Trouble-shooting
Measurement value < 11.5 V:
1) Charge battery
2) Check pin terminals