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NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to Next Step 3. REPLACE FUEL PUMP ECU a. Replace the fuel pump ECU. (See FUEL PUMP ECU ). 4. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED a. Check the fuel pump operation. OK: Malfunction has been repaired successfully. NG : REPLACE ECM (See REMOVAL ) OK : END 5. INSPECT CIRCUIT OPENING RELAY (C/OPN) a. Remove the circuit opening relay (C/OPN) from the engine room relay block. b. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Fig. 290: Inspecting Circuit Opening Relay (C/OPN) NG : REPLACE CIRCUIT OPENING RELAY (C/OPN) (See ON-VEHICLE INSPECTION ) OK : Go to Next Step 6. INSPECT CIRCUIT OPENING RELAY (POWER SOURCE VOLTAGE) a. Remove the circuit opening relay (C/OPN) from the engine room relay block. b. Turn the ignition switch to ON. Standard resistance Condition Specified Condition 3 - 5 When no battery voltage applied to terminals 1 and 2 10 kohms or higher 3 - 5 When battery voltage applied to terminals 1 and 2 Below 1 ohms
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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