DTC P2603-768: Oil Pump Control Circuit High: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK FUSE (OIL PMP)
- Remove the OIL PMP fuse from the engine room relay block No. 3.
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Resistance
Tester Connection Condition Specified Condition OIL PMP fuse Always Below 1 Ω TEXT IN ILLUSTRATION*1 Engine Room Relay Block No. 3 *2 OIL PMP Fuse - Install the OIL PMP fuse.
NG → REPLACE FUSE (OIL PMP)
OK: Go to next step
- CHECK RELAY (OIL PMP)
- Remove the OIL PMP relay from the engine room relay block No. 3.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1 - 2 Always 151 to 203 Ω 3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher Auxiliary battery voltage is applied between terminals 1 and 2 Below 1 Ω - Install the OIL PMP relay.
NG → REPLACE RELAY (OIL PMP)
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP RELAY - OIL PUMP)
- Remove the OIL PMP relay from the engine room relay block No. 3.
- Disconnect the A48 connector from the oil pump with motor assembly.
- Disconnect the A65 connector from the hybrid vehicle control ECU.
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Resistance (Check for Open)
Tester Connection Switch Condition Specified Condition OIL PMP relay terminal 1 - A65-1 (OPM2) Ignition switch off Below 1 Ω Standard Resistance (Check for Short)
Tester Connection Switch Condition Specified Condition OIL PMP relay terminal 1 or A65-1 (OPM2) - Body ground and other terminals Ignition switch off 10 kΩ or higher TEXT IN ILLUSTRATION*a Component without OIL PMP relay connected
(Engine Room Relay Block No. 3)*b Front view of wire harness connector
(to Oil Pump with Motor Assembly)*c Rear view of wire harness connector
(to Hybrid Vehicle Control ECU) - Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open)
Tester Connection Switch Condition Specified Condition OIL PMP relay terminal 5 - A48-4 (L) Ignition switch off Below 1 Ω Standard Resistance (Check for Short)
Tester Connection Switch Condition Specified Condition OIL PMP relay terminal 5 or A48-4 (L) - Body ground and other terminals Ignition switch off 10 kΩ or higher - Connect the hybrid vehicle control ECU connector.
- Connect the oil pump with motor assembly connector.
- Install the OIL PMP relay.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP)
- Disconnect the A48 connector from the oil pump with motor assembly.
- Disconnect the A65 connector from the hybrid vehicle control ECU.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Voltage
Tester Connection Switch Condition Specified Condition A48-2 (OPST) or A65-34 (OPST) - Body ground Ignition switch ON Below 1 V TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Oil Pump with Motor Assembly)*b Rear view of wire harness connector
(to Hybrid Vehicle Control ECU)NOTE:Turning the ignition switch to ON with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
- Turn the ignition switch off.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition A48-2 (OPST) - A65-34 (OPST) Ignition switch off Below 1 Ω - Connect the hybrid vehicle control ECU connector.
- Connect the oil pump with motor assembly connector.
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HYBRID VEHICLE CONTROL ECU
- Turn the ignition switch to ON.
- Enter inspection mode. Refer to INSPECTION MODE PROCEDURE
.
HINT:
Entering inspection mode activates the oil pump with motor assembly.
- Turn the ignition switch to ON (READY).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A65-1 (OPM2) - D72-6 (E1) Inspection mode
Ignition switch ON (READY)11 to 14 V TEXT IN ILLUSTRATION*a Component with harness connected
(Hybrid Vehicle Control ECU) - Turn the ignition switch off.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition A65-34 (OPST) - A66-5 (+B1) Ignition switch off 10 kΩ or higher - Turn the ignition switch off.
NG → See step 6
OK → See step 7
- REPLACE HYBRID VEHICLE CONTROL ECU. Refer to REMOVAL
- REPLACE OIL PUMP WITH MOTOR ASSEMBLY. Refer to REMOVAL