HYBRID / BATTERY CONTROL HYBRID CONTROL SYSTEM P253012 IG2 Signal Circuit Short to Auxiliary Battery
DESCRIPTION
The hybrid vehicle control ECU assembly compares the IGP signal to the IG control status signal sent from the certification ECU (smart key ECU assembly) to detect a stuck on malfunction of the IGP signal.
- HINT:
-
If DTC P253012 is stored, the vehicle will turn off (READY off).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P253012 | IG2 Signal Circuit Short to Auxiliary Battery | The IGP signal of the hybrid vehicle control ECU assembly and the IG switch signal sent from the main body ECU (multiplex network body ECU) do not match.
(1 trip detection logic) |
·
Auxiliary battery ·
Certification ECU (smart key ECU assembly) ·
Hybrid vehicle control ECU assembly ·
ECM ·
IGP relay ·
Wire harness or connector |
Does not come on | Master Warning:
Comes on |
SAE Code:
P2532 |
CONFIRMATION DRIVING PATTERN
- HINT:
-
After repair has been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and wait for 15 seconds or more.
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the GTS on.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
Check the DTC judgment result.
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
-
Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.
PROCEDURE
Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.
Measure the auxiliary battery voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal 20°C (68°F), Power switch off 12.0 V or higher
- Result:
Proceed to OK NG
OK
NG
Charge or replace the auxiliary battery.
- Result:
Proceed to NEXT
NEXT
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Clear the DTCs.
- Powertrain > Hybrid Control > Clear DTCs
- 50002 397
Turn the power switch off.
- Result:
Proceed to NEXT
NEXT
Turn the power switch on (IG) and wait for 15 seconds or more.
Turn the power switch off and wait for 2 minutes or more.
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
- Powertrain > Hybrid Control > Trouble Codes
- 50001 397
Check for DTCs.
- Result:
Result Proceed to P253012 is output. A P253012 is not output. B
Turn the power switch off.
A
B
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check for DTCs.
- Powertrain > Hybrid Control > Trouble Codes
- 50001 397
- Result:
Result Proceed to U012987, U014087, U015187, U016487, U110787 or U117087 is output A Other than above B
Turn the power switch off.
A
B
Disconnect the A30 hybrid vehicle control ECU assembly connectors.
| *a | Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly) |
Measure the voltage according to the value(s) in the table below.
- Condition:
Tester Connection Condition A30-26 (IGP) - A30-15 (E1) Power switch off
Reconnect the A30 hybrid vehicle control ECU assembly connectors.
- Result:
Result Proceed to 9 V or higher A Below 9 V B
A
B
Disconnect the A30 hybrid vehicle control ECU assembly connector.
Disconnect the A24 ECM connector.
| *a | Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly) |
Measure the voltage according to the value(s) in the table below.
- Condition:
Tester Connection Condition A30-26 (IGP) - A30-15 (E1) Power switch off
Reconnect the A24 ECM connector.
Reconnect the A30 hybrid vehicle control ECU assembly connector.
- Result:
Result Proceed to 9 V or higher A Below 9 V B
A
B
for A25B-FXS:
for A25D-FXS:
for A25F-FXS:
| *1 | No. 1 Engine Room Relay Block and Junction Block Assembly |
| *2 | IGP Relay |
Remove the IGP relay from the No. 1 engine room relay block and junction block assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
Install the IGP relay.
- Result:
Proceed to OK NG
OK
NG
Disconnect the A30 vehicle control ECU assembly connector.
Remove the IGP relay from the No. 1 engine room relay block and junction block assembly.
| *a | Front view of wire harness connector
(to Hybrid Vehicle Control ECU Assembly) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A30-26 (IGP) - Body ground Power switch off 1 V or less
Install the IGP relay.
Reconnect the A30 hybrid vehicle control ECU assembly connector.
- Result:
Proceed to OK NG
OK
Check for intermittent problems.
Check the connection and terminal contact pressure of the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the IGP relay.
When the power switch is on (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the IGP relay.
NG