1. ECM / PCM coupler disconnected
2. Ohmmeter
ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM) 6-27
Resistance Check
1) Disconnect couplers from ECM/PCM with ignition switch OFF.
CAUTION:
Never touch terminals of ECM/PCM itself or connect
voltmeter or ohmmeter.
2) Check resistance between each pair of terminals of discon-
nected couplers as listed in the following table.
CAUTION:
D Be sure to connect ohmmeter probe from wire harness
side of coupler.
D Be sure to turn OFF ignition switch for this check.
D Resistance in table represents that when parts temper-
ature is 20_C (68_F).
TERMINAL CIRCUIT
STANDARD
RESISTANCE
CONDITION
C51-2 to C51-30 Fuel injector No.1 Max. 0.6 Ω —
C51-5 to C51-6 Fuel injector No.2 Max. 0.6 Ω —
C51-3 to C51-31 Fuel injector No.3 Max. 0.6 Ω —
C51-4 to C51-32 Fuel injector No.4 Max. 0.6 Ω —
C51-14 to C51-41 CKP sensor 315 – 405 Ω At 20_C (68_F)
C51-22 to C51-39 Fuel temp. sensor
Refer to “FUEL TEMPERATURE SENSOR” in Section
SE3.
C51-29 to C51-50 Fuel pressure regulator 2 – 3 Ω At 20_C (68_F)
C51-45 to C51-46 ECT sensor Refer to “ECT SENSOR” in Section 6E3.
C51-33 to Body ground Ground Continuity —
C51-49 to Body ground Ground Continuity —
C51-51 to Body ground Ground Continuity —
C51-53 to Body ground Ground Continuity —
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