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CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

CHANGE NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER

Change the installed spark plug to a spark plug that functions normally. Perform a spark test. CAUTION:

Always disconnect all injector connectors. NOTICE:

Do not crank the engine for more than 2 seconds.

(1) Install the spark plug to the ignition coil and connect the ignition coil connector.

(2) Disconnect the injector connector.

(3) Ground the spark plug.

(4) Check if sparks occur while the engine is being cranked.

Sparks jump across electrode gap.

REPLACE IGNITION COIL ASSEMBLY THEN CONFIRM THAT THERE IS NO MISFIRE

REPLACE SPARK PLUG

INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30, AND /OR #40 VOLTAGE)

Wire Harness Side:

ECM Connector

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/

1 II

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Front View

A107892E42

(a) Disconnect the B30 ECM connector.

(b) Turn the ignition switch ON.

(c) Measure the voltage between the terminals of the ECM connector.

Standard voltage

Tester Connections

Specified Conditions

B30-108 (#10) - B30-45 (E01)

9 to 14 V

B30-107 (#20) - B30-45 (E01)

9 to 14 V

B30-106 (#30) - B30-45 (E01)

9 to 14 V

B30-105 (#40) - B30-45 (E01)

9 to 14 V

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Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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