Test sequence

Fig 1: Removing Engine Cover Panel

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Remove engine cover panel -1- -arrows-

Fig 2: Unplugging 4-pin connector -1- from ignition coil -2-

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Unplug 4-pin connector -1- from one ignition coil -2-.

Fig 3: Identifying Connector Terminals 1 And 4

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Connect multimeter (voltage measurement range) as follows:

Connector Contact	Measure against
1	Engine Ground

Switch on ignition.

Specification: approx. battery voltage

If the specification is not attained:

Switch off ignition.

Fig 4: Secondary Air Injection Pump Relay J299

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Unplug current supply relay -1- (located under cover on left side of bulkhead).

NOTE: To remove protective cover on vehicles with suspension turret stiffener strut, disengage and move down relay carrier on bulkhead. If necessary, also unplug connector on air mass meter.

Fig 5: Identifying Connector & 6 Terminals

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Test for open circuits in the following wiring connection according to current flow diagram:

Relay carrier under cover on left side of bulkhead Contact	Connectors on ignition coils Contact
2	1

Correct any open circuit as necessary.

If the wiring is OK:

Test supply voltage for Motronic current supply relay -J271. Refer to Checking voltage supply .
Test activation of Motronic current supply relay -J271. Refer to Checking activation .