Result:
HINT
If any DTCs other than P050B are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART See: Diagnostic Trouble Code Descriptions/SFI System
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (FUEL TRIM)
HINT
Calculate the total fuel trim values to check the characteristic deviation of the mass air flow meter sub-assembly.
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Active Test / Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2.
(e) Read the values displayed on the Techstream at engine idle.
(f) Add together the Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values to obtain the total fuel trim.
OK:
Total of Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values is between -20 % and 20 %.
NG -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM BANK 1 OR BANK 2)
OK -- Continue to next step.
3. CHECK THROTTLE VALVE
(a) Check for deposits around the throttle valve and throttle valve condition.
OK:
No deposits around throttle valve and throttle valve moves smoothly.
NG -- REPAIR OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
OK -- Continue to next step.
4. REPLACE ECM
(a) Replace the ECM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and
Repair/Removal.
NEXT -- CHECK WHETHER DTC OUTPUT RECURS (DTC P050B)
5. REPAIR OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
(a) Repair or replace the throttle with motor body assembly See: Powertrain Management/Fuel Delivery and Air Induction/Throttle
Body/Service and Repair/Removal.
NEXT -- Continue to next step.
6. CHECK WHETHER DTC OUTPUT RECURS (DTC P050B)
NOTICE:
In this operation, the engine must be cold (the same level as the engine coolant temperature recorded in the freeze frame data).
(a) Connect the Techstream to the DLC3.
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