DESCRIPTION
Refer to the description for DTC P1CCC96.
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The motor generator control ECU sends a signal to the DC/DC converter to prohibit its control and receives signals indicating a normal or abnormal (below 11 V) condition of the 12 V charging system from the DC/DC converter via the NODD signal line.
If the vehicle is being driven with an inoperative DC/DC converter, the voltage of the auxiliary battery will drop, which will prevent the continued operation of the vehicle. Therefore, the motor generator control ECU monitors the operation of the DC/DC converter and alerts the driver if it detects a malfunction.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P0A1112 | DC/DC Converter Enable Circuit Short to Battery | Short to +B detected in DC/DC converter NODD signal line (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
P0A1114 | DC/DC Converter Enable Circuit Short to Ground or Open | Open or short to ground detected in DC/DC converter NODD signal line (1 trip detection logic) |
| Does not come on | Master Warning Light: Comes on |
CONFIRMATION DRIVING PATTERN
HINT:
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
*a | Without waiting for 10 minutes |
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
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HINT:
If the NODD signal line is open, DC/DC converter control will be prohibited and the auxiliary battery voltage will be approximately 12 V or less.
PROCEDURE
1. | CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
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Result | Proceed to |
---|---|
OK | A |
NG (The connector is not connected securely.) | B |
NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) | C |
B | CONNECT SECURELY |
C | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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2. | CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT RELAY) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the A58 inverter with converter assembly connector.
(c) Remove the IGCT relay from the No.3 relay block.
(d) Measure the resistance according to the value(s) in the table below.
*1 | No.3 Relay Block | *2 | IGCT Relay |
*a | Front view of wire harness connector (to Inverter with Converter Assembly) | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A58-12 (IGCT) - 5 (IGCT relay) | Power switch off | Below 1 Ω |
(e) Install the IGCT relay.
(f) Reconnect the A58 inverter with converter assembly connector.
OK | REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |