The document describes a diagnostic trouble code (DTC) related to the engine drive unit (EDU) circuit. It provides the following information:
1) The EDU drives the spill control valve at high speeds using a DC/DC converter to provide high voltage. The engine ECU monitors the EDU for abnormalities.
2) The DC/DC converter increases the battery voltage to approximately 150V applied to the spill control valve based on signals from the ECU. Signal checks are sent between the EDU and ECU.
3) The DTC is caused when the spill control valve drive signal is output by the ECU at 500 rpm but the EDU does not provide a continuous feedback signal, indicating
The document describes a diagnostic trouble code (DTC) related to the engine drive unit (EDU) circuit. It provides the following information:
1) The EDU drives the spill control valve at high speeds using a DC/DC converter to provide high voltage. The engine ECU monitors the EDU for abnormalities.
2) The DC/DC converter increases the battery voltage to approximately 150V applied to the spill control valve based on signals from the ECU. Signal checks are sent between the EDU and ECU.
3) The DTC is caused when the spill control valve drive signal is output by the ECU at 500 rpm but the EDU does not provide a continuous feedback signal, indicating
The document describes a diagnostic trouble code (DTC) related to the engine drive unit (EDU) circuit. It provides the following information:
1) The EDU drives the spill control valve at high speeds using a DC/DC converter to provide high voltage. The engine ECU monitors the EDU for abnormalities.
2) The DC/DC converter increases the battery voltage to approximately 150V applied to the spill control valve based on signals from the ECU. Signal checks are sent between the EDU and ECU.
3) The DTC is caused when the spill control valve drive signal is output by the ECU at 500 rpm but the EDU does not provide a continuous feedback signal, indicating
The document describes a diagnostic trouble code (DTC) related to the engine drive unit (EDU) circuit. It provides the following information:
1) The EDU drives the spill control valve at high speeds using a DC/DC converter to provide high voltage. The engine ECU monitors the EDU for abnormalities.
2) The DC/DC converter increases the battery voltage to approximately 150V applied to the spill control valve based on signals from the ECU. Signal checks are sent between the EDU and ECU.
3) The DTC is caused when the spill control valve drive signal is output by the ECU at 500 rpm but the EDU does not provide a continuous feedback signal, indicating
CIRCUIT DESCRIPTION The EDU drives the spill control valve at high speeds. The EDUs highspeed driving under high fuel pressure conditions is achieved through the use of a DC/DC converter that provides a highvoltage, quick charging system. The engine ECU constantly monitors the EDU and stops the engine in case an abnormal condition is detected. The battery voltage is increased by the DC/DC converter. A voltage of approximately 150 V is applied to the spill control valve in accordance with the IJ+ signal received from the engine ECU. At this time, the injection verification signal (IJF) is sent to the engine ECU.
IJ+ Signal
SPV Signal [V]
[V] 5
150
Time
Time
Battery
DC/DC Converter SPV+
+B Spill Control Valve
IJ+ Engine ECU
SPVD
IJF
Controller
SPV
SPVF EDU
A23868
DTC No.
DTC Detection condition
P1215/97
Although Alth h SPVD is i output t t to t EDU with ith engine i speed d att 500 rpm or more, more SPVF is not input continuously 5 times or more
1HDFTV ENGINE SUP (RM1179E)
Trouble Area S Open or short in EDU circuit S EDU S Spill control valve
Check voltage between terminal 2 of wire harness side connector and body ground. PREPARATION: (a) Disconnect the EDU connector. (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal 2 of wire harness side connector and body ground. OK: Voltage: 10 to 14 V
ON
(+)
BE6653 A05975
()
2 (+B) A05977
NG
Check Spill valve relay circuit
(See page DI157).
OK
Check resistance EDU ground bolt and body ground.
NG
Tighten EDU ground bolt.
OK
Check resistance between terminals 4 and 5 of wire harness side connector.
CHECK: Measure resistance between terminals 4 and 5 of wire harness side connector. OK: Resistance: Approx. 1.7 W
5 (SPV)
(+)
()
4 (SPV+) A23899
NG
1HDFTV ENGINE SUP (RM1179E)
OK
Go to step 5.
DI85 DIAGNOSTICS
ENGINE
Check spill control valve (See Pub No. RM617E, page FU113).
NG
Check and replace injection pump
(See Pub No. RM617E, page FU113).
OK
Check for open and short in harness and connector between spill control valve and EDU (See page IN19).
Check for open and short in harness and connector between engine ECU and EDU (See page IN19).
NG
Repair or replace harness or connector.
OK
Check voltage between terminal SPVD of engine ECU connector and body ground. PREPARATION: (a) Remove the glove compartment door. (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminal SPVD of the engine ECU connector and body ground. OK: Voltage: Approx. 0 V
SPVD A23883
SPVD Signal Waveforms 1 V/DIV.
SPVD
GND 10 msec./DIV. (Idling)
1HDFTV ENGINE SUP (RM1179E)
A16926
Reference: INSPECTION USING OSCILLOSCOPE
During idling, check the waveform between terminals SPVD and E1 of the engine ECU. HINT: The correct waveform is as shown.
NG
Check and replace engine ECU
(See page IN19).
DI86 DIAGNOSTICS
ENGINE
OK
Check voltage between terminal SPVF of engine ECU and body ground. PREPARATION: (a) Remove the glove compartment door. (b) Turn the ignition switch ON. CHECK: Measure the voltage between terminals SPVF of the engine ECU and body ground. OK: Voltage: 9 to 14 V
SPVF A23883
SPVF Signal Waveforms 5 V/DIV.
SPVF
Reference: INSPECTION USING OSCILLOSCOPE
During idling, check the waveform between terminals SPVF and E1 of the engine ECU. HINT: The correct waveform is as shown.
