PINPOINT TEST HM: Secondary Air Injection (AIR) System: Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- secondary air injection system relay (14B192)
- electric air injection pump (9A486)
- secondary air injection bypass solenoid (9H465)
- harness circuits: B+, VPWR, AIR, AIRM, ground
- powertrain control module (PCM) (12A650)
- secondary air injection diverter valve (9F491)
- vacuum supply
- hoses
- partial restricted exhaust
Refer to the Wiring Diagrams article for schematic and connector information.
| Pin | Circuit |
|---|---|
| 86 | AIR (Secondary Air Injection) |
| 87 | AIR_PWR (AIR Pump Power) |
| 30 | B+ (Battery Positive Voltage) |
| 85 | VPWR (Vehicle Power) |
| Pin | Circuit |
|---|---|
| 2 | AIR_PWR (AIR Pump Power) |
| 1 | AIR_GND (AIR Pump Ground) |
For PCM connector views or reference values, refer to the REFERENCE VALUES article.
| Connector | Pin | Circuit |
|---|---|---|
| 140 Pin | B58 B66 B67 B33 B51 B50 B1 |
SIGRTN CASE GND PWRGND VREF VPWR AIRM AIR |