THERMO Elements For Ignition Circuit Monitor (GROUP 2, NO. 9010)

THERMO ELEMENTS FOR IGNITION CIRCUIT MONITOR

TECHNICAL SERVICE BULLETIN

THERMO ELEMENTS FOR IGNITION CIRCUIT MONITOR

Model(s): 1989-on Porsche 928 S4, 928 GT

Group: 2 - Engine Electronics

Bulletin No.: 9010

Part Identifier: 2880

Date: December 14, 1990

CONCERN

Operation of the ignition circuit monitoring relay can occur because of temperature difference between cylinders 4 and 8.

PRODUCTION CHANGE

From model year 1991, the thermo elements are installed on cylinders 3 and 7.

SERVICE INFORMATION

'89 and '90 model year cars can be modified if fault codes in the ignition circuit monitoring system appear although the ignition system is operating properly.

WORK PROCEDURE

Remove thermo element (1) and adapter (2) from cylinders 4 and 8 (Fig. Fig 1 ). Remove plugs (3) from cylinders 3 and 7 (Fig. Fig 1 ). Install plugs in cylinders 4 and 8 with new sealing rings (4) Part Number (N 013 812 6) and torque to 20 N.m (15 ft-lbs.). Install adapters with new sealing rings in cylinders 3 and 7 and torque to 20 N.m (15 ft-lbs.).

Install new thermo elements Part Number 928 606 155 01 (longer wiring) and torque to 10 N.m (7.5 ft-lbs.). Disconnect wiring plug from ignition circuit monitoring relay (located on LH/EZK control unit bracket). Disengage white wires E1 and E2 from plug and move E1 to E2 and E2 to E1 (Fig. Fig 2 ).

PARTS INFORMATION

Description	Part Number
New Thermo Elements	928 606 155 01
Sealing Rings	N 013 812 6

Refer to Workshop Manual 928 Volume 1A, Pages 28-75 thru 28-78 and 928 S4 Service Information Model '89 (WKD 495 521).

WARRANTY CLAIM INFORMATION

LABOR OPERATION: 2873190A

DAMAGE CODE: 2880400002

TIME UNITS: 100