Operation Section Table a.
MI-04 Diagnostic Fault Codes (Flash Codes) 84 DFC Probable Fault Action Corrective Action, First Check 34 MapSensorInputHigh TMAP sensor failure or shorted circuit Disable Throttle Check TMAP connector and MAP signal wiring for a shorted circuit 37 IATSensorInputLow TMAP sensor failure or shorted circuit Stored Fault Code (MIL Only) Check TMAP connector and IAT signal wiring for a shorted circuit 38 IATSensorInputHigh IAT signal disconnected, open circuit or sensor malfunction Stored Fault Code (MIL Only) Check TMAP connector and IAT signal wiring for an open circuit TMAP PIN 2 to SECM PIN 4 (SIGNAL) TMAP PIN 1 to SECM PIN 1 (GND) TMAP PIN 3 to SECM PIN 18 (XDCR +5VDC) To check the IAT sensor of the TMAP disconnect the TMAP connector and measure the IAT resistance *See the IAT table in Chapter 6.0 42 EST1Low Coil driver signal low or under-current Stored Fault Code (MIL Only) Check coil driver wiring and connector for shorts SECM PIN 7(EST1) to COIL PIN A Verify GND on COIL PIN B Verify GND on COIL PIN C Verify GND on COIL PIN D Verify +12vdc on COIL PIN E To check the Smart Coil internal circuit disconnect the coil connector and measure the resistance from pin to pin *See Smart Coil resistance check in Chapter 6.0 43 EST1High Coil driver signal high or over-current Stored Fault Code (MIL Only) Check coil driver wiring for an open circuit or disconnected connector