Engine Controls - Tests W/codes - 2.0L M/t: Diagnosis Mazda 626 GE

Trouble Code Access

Note. The PCME is located under the radio in front of shifter. Remove the center console for access. Be sure to disconnect the PCME connectors before connecting the SST to the PCME.

1. Use Self-Diagnostic Checker (49 H018 9A1) and System Selector (49 B019 9A0) to retrieve trouble codes. Connect one lead of self-diagnostic checker to ground and the other to system selector. see scheme 1 Connect system selector to data link connector. Connector is located near battery. If system selector is not available, connect a jumper wire between data link connector terminals TEN and GND to pull codes manually. see scheme 2
2. With ignition on and engine stopped, observe Malfunction Indicator Light (MIL). Note trouble codes. Check TROUBLE CODE IDENTIFICATION chart for possible cause. See CODE CHARTS for test procedures. If light remains on continuously, MIL circuit is grounded or PCME is defective.

Clearing Trouble Codes

Disconnect negative battery cable and depress brake pedal for at least 20 seconds. Reconnect battery cable. Reconnect self-diagnostic checker and system selector. see scheme 1 Turn ignition on, but do not start engine for 6 seconds. Start engine and run at 2000 RPM for 3 minutes. Verify no codes are displayed.

Trouble Code Identification Table. Scheme 102

TROUBLE CODE CHARTS

Note. See PIN VOLTAGE CHARTS article in the ENGINE PERFORMANCE section to identify PCME connector terminals.

Note. The following figures are courtesy of Mazda Motors Corp.

Trouble Code No. 2 Diagnostic Chart (Crankshaft Position Sensor - NE Signal). Scheme 103

Scheme 104

Trouble Code No. 3 Diagnostic Chart (Crankshaft Position Sensor - G Signal). Scheme 105

Trouble Code No. 3 Schematic (Crankshaft Position Sensor - G Signal). Scheme 106

Trouble Code No. 8 Diagnostic Chart (Airflow Sensor). Scheme 107

Trouble Code No. 8 Schematic (Airflow Sensor). Scheme 108

Trouble Code No. 9 Diagnostic Chart (Engine Coolant Temperature Sensor - CIS). Scheme 109

Trouble Code No. 9 Schematic (Engine Coolant Temperature Sensor - CIS). Scheme 110

Trouble Code No. 11 Diagnostic Chart (Intake Air Temperature Sensor). Scheme 111

Trouble Code No. 12 Diagnostic Chart (Throttle Position Sensor). Scheme 112

Trouble Code No. 15 Diagnostic Chart (Heated Oxygen Sensor). Scheme 113

Trouble Code No. 16 Diagnostic Chart (EGR Function Sensor). Scheme 114

Trouble Code No. 16 Schematic (EGR Function Sensor). Scheme 115

Trouble Code No. 17 Diagnostic Chart (Closed Loop System). Scheme 116

Trouble Code No. 25 Diagnostic Chart (Solenoid Valve - Pressure Regulator Control). Scheme 117

Trouble Code No. 26 Diagnostic Chart (Solenoid Valve - Purge Control). Scheme 118

Trouble Code No. 26 Schematic (Solenoid Valve - Purge Control). Scheme 119

Trouble Code No. 29 Diagnostic Chart (EGR Solenoid Vent Valve - Calif.). Scheme 120

Trouble Code No. 29 Schematic (EGR Solenoid Vent Valve - Calif.). Scheme 121

Trouble Code No. 28 Diagnostic Chart (Solenoid Valve - EGR Control). Scheme 122

Trouble Code No. 34 Diagnostic Chart (Idle Air Control Valve). Scheme 123

Trouble Code No. 67 Diagnostic Chart (Coolant Fan Relay No. 1). Scheme 124

Trouble Code No. 67 Schematic (Coolant Fan Relay No. 1). Scheme 125