P1206

DIAGNOSTIC TROUBLE CODES P1206, P12O7
Secondary air injection relay, output from control module low/high,
No continuity or shorting to ground/batt+.

Symptom
CHECK ENGINE lamp (MIL) on.

Condition
No continuity or shorting to ground/batt+ in the circuit to pin 23.

Diagnostic Procedure.
1. Activate the ISAT command "SECOND. AIR RELAY" in the "ACTIVATE" menu and listen to check whether the pump and solenoid valve are activated.

If the pump is activated, proceed to step 5.
If it is not, continue as described below.

2. Connect a lead between a good ground and pin 85 of the secondary air injection pump relay.
With the ignition switch in the DRIVE position, the relay should operate and the pump start running.

If the relay operates and the pump starts, proceed to step 4.
If the relay does not operate, check whether current is present on pin 86 of the relay when the ignition switch is in the DRIVE position (the current comes from fuse 19.
If the relay does not operate, despite current on pin 86 and pin 85 connected to ground, check the resistance of the relay coil.

The resistance across pins 85 and 86 should be about 60 ohms.

If it is not, change the relay.





3. If the relay operates but the pump does not start, check whether current from fuse 43 is present on pin 30 of the relay.
Connect a jumper between pins 30 and 87 of the relay holder and check whether the air injection pump receives current.
Also check that the pump is properly connected to grounding point G30.

If the pump is grounded and receiving current but still does not work, change the pump.

4. Check the lead between pin 23 of the control module and pin 85 of the relay for continuity/shorting.
Clear the trouble code and wait for the engine temperature to drop to about 70°C (160°F).
Start the engine and check that the control module grounds pin 23 for about 15 seconds (engine temperature above 70°C). The control module delays this function for about one second (hot engine) or about five seconds (cold engine) after the engine has started.
The easiest way to carry out this test is with a voltmeter connected to batt+ and pin 85 of the relay.

NOTE: The pump will run for a maximum of 100 seconds when the engine is cold or a maximum of 15 seconds when the engine is hot. If the control module does not ground pin 23, try carrying out step 3 once again at a lower engine temperature.

5. Clear the trouble code and drive the car on the road to check whether the code is generated afresh.

If it is, continue at "Before Control Module Replacement" for further diagnostic instructions. Before Replacing A Control Module