Subaru Crosstrek Service Manual: Dtc p1493 coil 1 egr "a" control circuit high
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P1493 COIL 1 EGR "A" CONTROL CIRCUIT HIGH
NOTE:
For the diagnostic procedure, refer to DTC P1499. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1499 COIL 4 EGR "A" CONTROL CIRCUIT HIGH">
1. OUTLINE OF DIAGNOSIS
• Detects open or short circuit of EGR.
• Judge as NG when the ECM output level differs from the actual terminal level.
2. COMPONENT DESCRIPTION
(1) | Engine control module (ECM) | (4) | Switch circuit | (6) | Main relay |
(2) | Computer unit (CPU) | (5) | Battery voltage | (7) | EGR control valve |
(3) | Detecting circuit |
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
EGR control signal | OFF |
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
EGR control current | ≥ 6 A |
Time Needed for Diagnosis: 2500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
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The
light illuminates with the parking
brake applied while the ignition switch is
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