Toyota Tundra (2015 year). Manual — part 1603
OK
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and
check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
12.
WIRING DIAGRAM
Refer to DTC P0412
.
INSPECTION PROCEDURE
NOTICE:
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and
other data from the time the malfunction occurred.
PROCEDURE
1.
INSPECT AIR PUMP HEATER RELAY (AI HTR)
(a) Inspect the air pump heater relay (AI HTR)
.
NG
REPLACE AIR PUMP HEATER RELAY (AI HTR)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144...
OK
2.
CHECK AIR PUMP HEATER RELAY (AI HTR) (POWER SOURCE)
(a) Remove the air pump heater relay (AI HTR).
(b) Measure the voltage according to the value(s) in the
table below.
Standard Voltage:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
AI HTR relay terminal 1 -
Body ground
Ignition switch
ON
11 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3.
CHECK HARNESS AND CONNECTOR (ECM - AI HTR RELAY)
(a) Remove the air pump heater relay (AI HTR).
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
AI HTR relay terminal 2 - D74-61 (HAI1)
Always
Below 1 Ω
AI HTR relay terminal 2 or D74-61 (HAI1) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM0000021140P5X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605; Engine Stall History; 2015 MY Tundra
[08/2014 - ]
DTC
P1603
Engine Stall History
DTC
P1605
Rough Idling
DESCRIPTION
P1603
After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.
Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the
freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information
can be useful when troubleshooting.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P1603
After monitoring for startability problems (P1604) finishes
and 5 seconds or more elapse after starting the engine, with
the engine running, the engine stops (the engine speed drops
to 200 rpm or less) without the ignition switch being
operated for 0.5 seconds or more (1 trip detection logic).
Air leak in air induction
system
Purge VSV
Brake booster
Mass air flow meter
Engine coolant temperature
sensor
Thermostat
Power supply circuit (purge
VSV, air fuel ratio sensor,
fuel injector assembly,
ignition coil assembly)
Fuel pump
Fuel pump control circuit
Fuel line
PCV valve and hose
Camshaft timing oil control
valve
Knock sensor
Ignition system
Air conditioning system
Power steering system
Electrical load signal system
Charging system
A/T system
Park/Neutral position switch
assembly
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P160...
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
ECM
Wire harness or connector
Engine immobiliser system
P1605
This DTC is stored if the engine speed drops below the set speed without the ignition switch being operated.
Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the
freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information
can be useful when troubleshooting.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P1605
After 5 seconds or more elapse after starting the
engine, with the engine running, the engine speed
drops to 400 rpm or less without the ignition switch
being operated (1 trip detection logic).
Air leak in air induction system
Purge VSV
Brake booster
Mass air flow meter
Engine coolant temperature
sensor
Thermostat
Power supply circuit (purge VSV,
air fuel ratio sensor, fuel injector
assembly, ignition coil assembly)
Fuel pump
Fuel pump control circuit
Fuel line
PCV valve and hose
Camshaft timing oil control valve
Knock sensor
Ignition system
Air conditioning system
Power steering system
Electrical load signal system
Charging system
A/T system
Park/Neutral position switch
assembly
ECM
Wire harness or connector
Engine immobiliser system
INSPECTION PROCEDURE
HINT:
In contrast to normal malfunction diagnosis for components, circuits and systems, DTCs P1603 and
P1605 are used to determine the malfunctioning area from the problem symptoms and freeze frame
data when the user mentions problems such as engine stall.
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