Jetta Sedan L5-2.5L (CBTA) (2009)
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used, perform the following step.
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Install the test box.
If the manufacturers test box is not being used, perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair/Motronic Engine Control Module, Replacing.
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Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay (J299) socket 3/86 to the Engine Control Module (ECM) (J623)
electrical harness connector T94 terminal 94 for resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
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Check the wiring for an open circuit, a short circuit to each other, Battery (+), and Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was OK:
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Replace the Secondary Air Injection (AIR) Pump Relay (J299).
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Erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Diagnostic Mode 04 - Erase DTC Memory.
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Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. Refer to --> [ Readiness Code ] See: Computers and Control Systems/Testing and Inspection/Monitors,
Trips, Drive Cycles and Readiness Codes.
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End diagnosis.
If the DTC returns and no malfunction is found in the wiring and the voltage supply was OK:
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Replace the Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair/Motronic Engine Control Module, Replacing.
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Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Diagnostic Mode 04 - Erase DTC Memory.