Inspection Procedure
WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine does not crank, proceed to the problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
- Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).
- READ VALUE OF TECHSTREAM (STARTER SIGNAL)
- Connect Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the tester on.
- Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
- Check the value displayed on the tester when the engine switch is turned on (IG) and the engine is started.
OK
DATA LISTEngine Switch Condition ON (IG) ENGINE START STARTER SIG OFF ON OK: REPLACE ECM
NG: Go to next step
- INSPECT PARK / NEUTRAL POSITION SWITCH ASSEMBLY
- Inspect the Park/Neutral Position (PNP) switch.
- Disconnect the E45 switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTGear Selector Lever Position Tester Connection Specified Condition P 4 (B) - 5 (L) Below 1 Ω N 4 (B) - 5 (L) Below 1 Ω - Reconnect the PNP switch connector.
NG: REPLACE PARK / NEUTRAL POSITION SWITCH (THEN CHECK CRANKING HOLDING FUNCTION CIRCUIT)
OK: CHECK CRANKING HOLDING FUNCTION CIRCUIT
- Inspect the Park/Neutral Position (PNP) switch.