FUEL SYSTEM (DFI) 3-63

Subthrottle Sensor (Service Code 32)

Resistance• Inspection

•Turn the ignition switch OFF.

•Disconnect the subthrottle sensor connector.

Connect a digital meter [A] to the subthrottle sensor con-

•nector [B].

Measure the subthrottle sensor resistance.

If the reading is out of the range, replace the throttle body assy.

If the reading is within the range, but the problem still exists, replace the ECU (see this chapter).

3-64 FUEL SYSTEM (DFI)

Stick Coils (#1, #2, #3, #4: Service Code 51, 52, 53, 54)

Stick Coil #1: Ignition Coil (Service Code 51)

Stick Coil #2: Ignition Coil (Service Code 52)

Stick Coil #3: Ignition Coil (Service Code 53)

Stick Coil #4: Ignition Coil (Service Code 54)

Removal/Installation

CAUTION

Never drop the stick coils, especially on a hard surface. Such a shock to the stick coil can damage it.

•See the Ignition System section in the Electrical System chapter.

Input Voltage Inspection

NOTE

○Be sure the battery is fully charged.

•Turn the ignition switch OFF.

•Remove the ECU (see this chapter). Do not disconnect

•the ECU connector.

Connect a digital voltmeter [A] as shown, with the needle adapter set [B].

○Measure the input voltage to each primary winding of the ignition coils with the engine stopped, and with the con-

•nectors joined.

Turn the ignition switch ON.

Stick Coil Input Voltage at ECU

Connections for Stick Coil #1

Meter (+) → BK lead (terminal 39)

Meter (–) → BK/Y lead (terminal 51)

Connections for Stick Coil #2

Meter (+) → BK/G lead (terminal 38)

Meter (–) → BK/Y lead (terminal 51)

Connections for Stick Coil #3

Meter (+) → BK/W lead (terminal 37)

Meter (–) → BK/Y lead (terminal 51)

Connections for Stick Coil #4

Meter (+) → BK/O lead (terminal 52)

Meter (–) → BK/Y lead (terminal 51)

If the reading is out of the standard, check the wiring (see next wiring diagram).

If the reading is good, the input voltage is normal. Crank the engine, and check the peak voltage of the stick coils (see Electrical System chapter) in order to check the primary coils.

FUEL SYSTEM (DFI) 3-65

Stick Coils (#1, #2, #3, #4: Service Code 51, 52, 53, 54)