P0414

DIAGNOSTIC TROUBLE CODES P0410, P0413, P0414
Secondary air injection relay, output from control module, malfunctioning or not working at all

Fault Symptom.
The CHECK ENGINE lamp (MIL) is on.

Conditions.
If a short circuit/open circuit occurs, a diagnostic trouble code will be generated.

DIAGNOSTIC PROCEDURE

1. Checking The Operation Of The Secondary Air Injection Relay
Connect the Scan Tool.
Ignition switch in the ON position.
Select "ACTIVATE".
Select "SECOND. AIR RELAY".


The command activates the relay at a frequency of 1 Hz for 10 seconds. For longer activation the command must be repeated.

Listen for the sound of the relay and pump in operation.

If the relay clicks, continue with point 3.

If the relay does not click, continue with point 2.

2. Checking The Secondary Air Injection Relay's Electrical Interfaces
Remove the relay.





Check the relay's resistance. Take a reading of the resistance across relay pins 85 and 86. A reading of about 85 ohms should be obtained.

If the reading is OK, continue with "Checking the voltage supply".

If the reading is not OK, change the relay.

Checking the voltage supply:
Connect a test lamp between pin 86 of the relay base and a good ground.
The test lamp should light up.

If the test lamp lights up, continue with point 3.

If the test lamp does not light up, check the lead between pin 86 of the relay base and terminal block 159 for continuity and shorting and take suitable action if necessary.

3. Checking The Secondary Air Injection Relay's Electrical Interfaces (contd.)
Checking the connection to ground.





The relay is grounded via pin 52 of the control module.
Connect a test lamp to pins 86 and 85 of the relay base.
Select "ACTIVATE".
Select "SECOND. AIR RELAY".
The test lamp should start flashing.

If the test lamp flashes, continue with point 4.

If the test lamp does not light up or lights up but does not flash, check the lead between pin 26 of the control module and pin 85 of the relay base for continuity/shorting.

4. Final Check
Clear the diagnostic trouble code, drive the car on test and check whether the trouble code is generated afresh.

If the DTC is generated again, refer to Before Replacing A Control Module.

If the DTC is not generated again, the action taken to rectify the fault was correct, otherwise the fault is of intermittent nature.