—- Troubleshooting Flow Chart -—--—
Contents
1. Troubleshooting Flow Chart ECU PGM FI warning light isn t on for 2 seconds after igni tion is first turned on is oi pressure warning light on NO Inspect No 13 fuse YES Turn the ignition switch OFF Is No 13 fuse OK NO Replace fuse YES Connect the system checker har ness between the ECU and con Repair open in YEL wire be tween No 13 fuse and com nector page 6 137 bination meter Connect B6 terminal to body ground OOCOOOOCCO BOO CCOCCCCO BOCCC0000 OOOCCOCOOCO BOO o00 00000 B00000000 B6 lt Turn the ignition switch ON Replace warning light bulb Is PGM FI warning light on NO Repair open in YEL RED wire between ECU B6 and com bination meter YES e OOOO o elelo 0100 0 0 0 Q OOOO BOOQ CO0C0000 A2 B6 O00000 P OOO A4 Connect the following terminals eae individually to B6 e A2 e A4 Repair open in BLK wire between ECU A2 and G101 Is PGM FI warning light on Repair open in BLK wire between ECU YES A4 and G101 Substitute a known good ECU and recheck if symp tom indication goes away replace the original ECU contd 6 139 PGM FI Control System Troubleshooting Flow Chart PGM FI warning light is on LED doesn t blink Connect the system checker har ness between the ECU and con nector page 6 137 But dis connect B connector from ECU only not the wire h2. arness ECU cont d Turn the ignition switch ON Repair short to D PGM FI ing light re YES ground in YEL RED ain on Te eer wire between ECU B6 and combina tion meter NO Reconnect B connector to ECU OOOCOCOOCOCOCO BOC OCOOCCOOO BO0C C0000 DOCOCOOOG erolelo olole o o o BCOCCCC0O0 Connect following terminals indi vidually to A2 A16 e A18 Repair open in BLK RED wire be tween ECU A18 and G101 Repair open in BRN BLK wire be YES tween ECU A16 and G101 Is PGM FI warning tight on Measure voltage between A13 A15 terminais and A18 P oooocoocococoloooooooo A18 Repair open in YEL BLK wire be tween ECU A13 A15 and main Is there battery voltage relay d Check main relay YES and wiring connec tors at main relay page 6 195 terminal Al3 A15 OCOOSCOOCOOOBCOOCO00000 BO0CCC0000 OO000000 A Substitute a known good ECU and recheck If symp tom indication goes away replace the original ECU 6 140 PGM FI warning light is on LED stays on Turn the ignition switch on Disconnect the 3P connector of each sensor one at a time e MAP sensor e Throttle angle sensor e EGR valve lift sensor KX KS KZ Replace the sensor that Does LED indicate the CODE for NO caused the CODE to appear the sensor disconnected upon its disconnection YES R
3. econnect all connectors Disconnect the connector each sensor one at a time e PA sensor e IMA sensor Except KX KS KZ KQ of Does LED indicate CODE for the N YES Replace the PA sensor sensor disconnected NO Reconnect the connector Turn the ignition switch OFF Connect the system checker har C13 C15 ness between the ECU and con CODDCOCCODO FOO CCOCOCCO MOCO000bs nector page 6 127 But dis ooooo0000ffooocoo00000o0000000 connect C connector from ECU only not the wire harness Check for continuity between the body ground and the following terminals individually e C13 e C15 Repair short to ground in RED WHT wire between ECU ee z YES C15 and MAP sensor YEL WHT wire between ECU NO C13 and PA sensor throttle angle sensor IMA sensor or Substitute a known good EGR valve lift sensor ECU and recheck If symp tom indication goes away replace the original ECU 6 141
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