The Air Injection Pump is in the engine compartment, item # 9. The diagram shows the location but sorry, I could not find a better diagram in our database.
Unplug the air injection pump relay and test if the fuse still blows. If yes, then problem is caused by shorting between fuse and relay.
Fuse # 7 in underhood fuse box is the correct fuse and it only is used by the Air Injection Puump and its relay.
Here are the diagnostics for the problem if you don't have them.
CODE 29, SECONDARY AIR INJECTION
Ignition voltage is supplied voltage when ignition is on. PCM controls air pump relay by providing a ground through one of its Quad-Drivers Modules (QDM). When relay is actuated, terminal is grounded and its monitored voltage will be low. When an output is off, its terminal voltage will be high. Each QDM has a separate fault line to indicate presence of a current fault to control module central processor.
NOTE: Test numbers refer to numbers on diagnostic chart.
1 . Code 29 will set if the PCM detects the wrong voltage potential. Test will determine if relay can be controlled by PCM.
2 . This check can detect a partially shorted coil which would cause excessive current flow. Excessive current flow to a QDM will be detected as a fault and set a code.
3 . The remaining checks will identify a circuit problem that has caused an excessive current flow or inoperative relay.
Check related harness connectors, including PCM harness. Check for damaged or pushed out terminals.
Wednesday, October 28th, 2009 AT 12:09 PM