SEAT Workshop Service and Repair Manuals

Voltage supply and wiring to control unit: verification Test condition l  Battery voltage 11.5 V Checking sequence

–  Pull 6-pin connector off the throttle valve control unit -J338--arrow-.

–  Connect the manual multimeter -VAG 1526C- or digital multimeter -VAG 1715- to contacts 2 and 6 of the connector to measure voltage, using the auxiliary cable kit -VAG 1594C-. –  Switch on ignition. t  Specification: min. 4.5 V –  Switch ignition OFF. –  Connect the multimeter to measure voltage to contact 2 of the connector and earth. –  Switch on ignition. t  Specification: min. 4.5 V –  Switch ignition OFF. If results do not match specifications: Engine code letters: BXV - BBM –  Connect the engine tester -VAG 1598/22- to the control unit cable harness.

Engine code letters: AZQ - BME

–  Connect the engine tester -VAG 1598/31- to the control unit cable harness. Without connecting the engine control unit.

All other vehicles continued

–  Test cables for open circuit between the engine tester -VAG 1598/31- or engine tester -VAG 1598/22- and the 6-pin connector:

Connection	Female socket VAG 1598/31	Female socket VAG 1598/22
1	90	68
2	97	55
3	119	80
4	92	75
5	121	66
6	91	61
Wire resistance: 1.5 Ω max.

–  Additionally check wires for shorts to one another, to vehicle earth or to battery positive. t  Specification: ∞ Ω. If no fault in lines is detected: –  Check engine control unit voltage supply.