Inspection Procedure

1. Check operation of OCV by hand-held tester. 

   PREPARATION:

   1. Connect the hand-held tester to the DLC3.
   2. Start the engine and warm it up.
   3. Turn the hand-held tester ON.
   4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1.

   CHECK:

   Check the engine speed when operating the OCV by the hand-held tester.

   OK:

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Operation	Specified Condition
   OCV OFF	Normal engine speed
   OCV ON	Engine idles roughly or stalls (soon after OCV switched from OFF to ON)

   1. OK : Check for intermittent problems (See  PRE-CHECK  ). 
   2. NG : Go to Next step 
2. Check operation of OCV. 
   Fig 1: Applying Battery Voltage Between Terminals Of OCV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   PREPARATION:

   1. Start the engine and warm it up.
   2. Disconnect the OCV connector.
   3. Apply battery voltage between terminals 1 and 2 of the OCV.

   CHECK:

   Check the engine speed.

   OK:

   Rough idle or engine stall. 

   1. NG : Replace OCV. 
   2. OK : Go to next step 
3. Check voltage between terminals OCV+ and OCV- of ECM connector. 
   Fig 2: Identifying ECM Connector Terminals Of OCV+ And OCV- And OCV Signal Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK:

   During idling, check the waveform between the specified terminals of the E6 ECM connector using the oscilloscope.

   OK:

   TESTER CONNECTION AND SPECIFIED CONDITION (CHECK FOR OPEN)
   
   

   Tester Connection	Specified Condition
   OCV+ (E6-15) - OCV- (E6-14)	Correct waveform is as shown

   1. NG : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. OK : Go to next step 
4. Check for open and short in harness and connectors between OCV and ECM. 
   Fig 3: Identifying Camshaft Timing Oil Control Valve Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   PREPARATION:

   1. Disconnect the C18 OCV connector.
   2. Disconnect the E6 ECM connector.

   CHECK:

   Measure the resistance between the wire harness side connectors.

   OK:

   Standard (Check for open): 

   TESTER CONNECTION AND SPECIFIED CONDITION (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   Oil control valve (C18-1) - OCV- (E6-14)	Below 1 Ω
   Oil control valve (C18-2) - OCV+ (E6-15)	Below 1 Ω

   Standard (Check for short): 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   Oil control valve (C18-1) or OCV- (E6-14) - Body ground	10 kΩ or higher
   Oil control valve (C18-2) or OCV+ (E6-15) - Body ground	10 kΩ or higher

   Fig 4: Disconnecting E6 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Repair or replace harness or connector. 
   2. OK : Check for intermittent problems (See  PRE-CHECK  ). 

OBD II scan tool (excluding the hand-held tester):

1. Check operation of OCV. 
   Fig 5: Applying Battery Voltage Between Terminals Of OCV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   PREPARATION:

   1. Start the engine and warm it up.
   2. Disconnect the OCV connector.
   3. Apply battery voltage between terminals 1 and 2 of the OCV.

   CHECK:

   Check the engine speed.

   OK:

   1. Rough idle or engine stalled 
   1. NG : Replace OCV. 
   2. OK : Go to next step 
2. Check voltage between terminals OCV+ and OCV- of ECM connector. 
   Fig 6: Identifying ECM Connector Terminals Of OCV+ And OCV- And OCV Signal Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK:

   During idling, check the waveform between the specified terminals of the E6 ECM connector using the oscilloscope.

   OK:

   TESTER CONNECTION AND SPECIFIED CONDITION (CHECK FOR OPEN)
   
   

   Tester Connection	Specified Condition
   OCV+ (E6-15) - OCV- (E6-14)	Correct waveform is as shown

   1. NG : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. OK : Go to next step 
3. Check for open and short in harness and connector between OCV and ECM. 
   Fig 7: Identifying Camshaft Timing Oil Control Valve Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   PREPARATION:

   1. Disconnect the C18 camshaft timing oil control valve connector.
   2. Disconnect the E6 ECM connector.

   CHECK:

   Measure the resistance between the wire harness side connectors.

   OK:

   Standard (Check for open): 

   TESTER CONNECTION AND SPECIFIED CONDITION (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   Oil control valve (C18-1) - OCV- (E6-14)	Below 1 Ω
   Oil control valve (C18-2) - OCV+ (E6-15)	Below 1 Ω

   Standard (Check for short): 

   MONITOR STRATEGY
   
   

   Tester Connection	Specified Condition
   Oil control valve (C18-1) or OCV- (E6-14) - Body ground	10 kΩ or higher
   Oil control valve (C18-2) or OCV+ (E6-15) - Body ground	10 kΩ or higher

   Fig 8: Disconnecting E6 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Repair or replace harness or connector. 
   2. OK :Check for intermittent problems (See  PRE-CHECK  ).