TROUBLESHOOTING GUIDE

F-27spec table

Troubleshooting steps 5-11

STEP	INSPECTION	RESULT	ACTION
5	Check if ECU terminal voltages are OK (2D, 2O and 2Q) — page F-129	Yes	Go to next step
5	Check if ECU terminal voltages are OK (2D, 2O and 2Q) — page F-129	No	Check for cause (Refer to "Check Point for Each Terminal") — page F-132
6	Check if strong blue spark is visible at each disconnected high-tension lead while cranking engine	Yes	Go to next step
6	Check if strong blue spark is visible at each disconnected high-tension lead while cranking engine	No	Check ignition system (Refer to Troubleshooting "Misfire") — page G-18
7	Check for injector operating sound at each injector at idle	Yes	Go to Step 9
7	Check for injector operating sound at each injector at idle	No	Go to Step 8
8	Check if approx. 12V exists at injector connector (W/R) wire with ignition switch ON	Yes	Check if injector resistance is OK — page F-112; Resistance: Approx. 14Ω; If OK, check wiring between injector and ECU — page F-7; If not OK, replace injector — page F-112
8	Check if approx. 12V exists at injector connector (W/R) wire with ignition switch ON	No	Check wiring between main relay and injector — page F-7
9	Check for correct engine compression — page B-10; Engine compression: 1,324—932 kPa (13.5—9.5 kg/cm², 192—135 psi) - 300 rpm	Yes	Go to next step
9	Check for correct engine compression — page B-10; Engine compression: 1,324—932 kPa (13.5—9.5 kg/cm², 192—135 psi) - 300 rpm	No	Check engine condition — page B-10: Worn piston, piston rings or cylinder wall; Defective cylinder head gasket; Distorted cylinder head; Improper valve seating; Valve sticking in guide
10	Check if spark plugs are OK	Yes	Go to next step
10	Check if spark plugs are OK	No	Repair, clean, or replace — page G-20
11	Try known good ECU and check if condition improves — page F-127

INSPECTIONCheck if ECU terminal voltages are OK (2D, 2O and 2Q) — page F-129

RESULTYes

ACTIONGo to next step

INSPECTIONCheck if ECU terminal voltages are OK (2D, 2O and 2Q) — page F-129

RESULTNo

ACTIONCheck for cause (Refer to "Check Point for Each Terminal") — page F-132

INSPECTIONCheck if strong blue spark is visible at each disconnected high-tension lead while cranking engine

RESULTYes

ACTIONGo to next step

INSPECTIONCheck if strong blue spark is visible at each disconnected high-tension lead while cranking engine

RESULTNo

ACTIONCheck ignition system (Refer to Troubleshooting "Misfire") — page G-18

INSPECTIONCheck for injector operating sound at each injector at idle

RESULTYes

ACTIONGo to Step 9

INSPECTIONCheck for injector operating sound at each injector at idle

RESULTNo

ACTIONGo to Step 8

INSPECTIONCheck if approx. 12V exists at injector connector (W/R) wire with ignition switch ON

RESULTYes

ACTIONCheck if injector resistance is OK — page F-112; Resistance: Approx. 14Ω; If OK, check wiring between injector and ECU — page F-7; If not OK, replace injector — page F-112

INSPECTIONCheck if approx. 12V exists at injector connector (W/R) wire with ignition switch ON

RESULTNo

ACTIONCheck wiring between main relay and injector — page F-7

INSPECTIONCheck for correct engine compression — page B-10; Engine compression: 1,324—932 kPa (13.5—9.5 kg/cm², 192—135 psi) - 300 rpm

RESULTYes

ACTIONGo to next step

INSPECTIONCheck for correct engine compression — page B-10; Engine compression: 1,324—932 kPa (13.5—9.5 kg/cm², 192—135 psi) - 300 rpm

RESULTNo

ACTIONCheck engine condition — page B-10: Worn piston, piston rings or cylinder wall; Defective cylinder head gasket; Distorted cylinder head; Improper valve seating; Valve sticking in guide

INSPECTIONCheck if spark plugs are OK

RESULTYes

ACTIONGo to next step

INSPECTIONCheck if spark plugs are OK

RESULTNo

ACTIONRepair, clean, or replace — page G-20

INSPECTIONTry known good ECU and check if condition improves — page F-127

RESULT

ACTION

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TROUBLESHOOTING GUIDE

Troubleshooting steps 5-11

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