2001 TOYOTA SEQUOIA Service Repair Manual

fog light wiper fluid automatic transmission fluid isofix traction control brake sensor

Page 545 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±343
537 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P1613 Air Injection System Air Injection Driver
CIRCUIT DESCRIPTION
Refer to DTC P0412 on page DI±234.
DTC No.DTC Detecti

± DIAGNOSTICSENGINE
DI±343
537 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P1613 Air Injection System Air Injection Driver
CIRCUIT DESCRIPTION
Refer to DTC P0412 on page DI±234.
DTC No.DTC Detection ConditionTrouble Area
P1613
Either of the following condition (a) or (b) is met:
(a) All of the following conditions are met (1 trip detection logic):
Either the air pump or air switching valve does not operate.
Air injection driver outputs a normal signal (80% duty signal)
(b) All of the following conditions are met (1 trip detection logic):
Air injection driver outputs an abnormal duty signal (duty sig-
nal excluding 0, 20, 40, 60, 80, 100%)
Air injection driver (AID)
Open in air injection driver ground circuit
P1613
All of the following conditions are met (1 trip detection logic):
(a) Air injection system operates (Air pump ON and all ASV
ON)
(b) Air injection driver outputs an air pump malfunction signal
(0% duty signal)Short in diagnostic information signal circuit (AID ± ECM)
Open or short in air pump and air switching valve command
signal circuit (AID ± ECM)
Air injection driver (AID)
Open in air injection driver ground circuit
ECM
P1613Air injection driver outputs an abnormal duty signal (100% duty
signal) (1 trip detection logic)
Open or short in AID power source circuit
Open in diagnostic information signal circuit (AID ± ECM)
Air injection driver (AID)
ECM
MONITOR DESCRIPTION
When the air injection system operation is required while the engine is warming up, the ECM transmits com-
mand signals to the Air Injection Driver (AID) to drive the air pump and air switching valve.
AID detects an open or short in the air pump and air switching valve circuit according to the terminal voltage
and sends a signal as diagnostic information to the ECM.
If the air injection system drive circuit or the AID itself has a malfunction, the AID sends a malfunction signal
(duty signal) as a diagnostic information signal to the ECM (when the system is normal, a system normal
signal is sent).
The ECM sets the DTC based on the diagnostic information from the AID.
Example:
(1) The duty ratio of the diagnostic information signal output from the AID is 0 or 100% (remains at
0 V or battery voltage).
(2) The duty ratio output from the AID is the ratio to output the impossible (excluding 0, 20, 40, 60,
80, 100%).
(3) The AID outputs the normal signal (normal duty signal: 80%) while the system is not operating.
DIDMX±01

Page 546 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±344
± DIAGNOSTICSENGINE
538 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
Related DTCsP1613Secondary air injection system control module
range check
Required sensors/componentsAir inj

Page 547 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17411
ECM Connector
E1AIDI
A16555
AIR INJ CHECK
AIR PUMP............................ON
EASV ............................OPEN
ASV1. .............................OPEN
ASV2..........................

Page 548 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual Example: 80% Duty Signal5 V/DIV.
GND
20 ms/DIV. DI±346
± DIAGNOSTICSENGINE
540 Author: Date:
2005 SEQUOIA (RM1146U)
(1) Monitor the voltage output of the AID (duty ratio sig-
nal).
Oscilloscope

Page 549 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A23464
AID Diagnostic Signal WaveformsECM
CommandsDTCs
Suspected Trouble Areas
(ECM Output)
100 % Duty ratio
+B
Almost Battery Voltage
GND
0 % Duty ratio
+B
Fixed at Low Voltage
GND
20 % Duty ratio
20

Page 550 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±348
± DIAGNOSTICSENGINE
542 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:
Using the AIR INJ CHECK operation of the SYSTEM CHECK provided in the hand±held tester func-
tion, conditions for air�

Page 551 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17411
E4
AIDI
± DIAGNOSTICSENGINE
DI±349
543 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check voltage between AIDI terminal of ECM and body ground.
PREPARATION:
(a) Start the engine and warm it up.

Page 552 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17411
E4
AIRVAIRP
B17444
Wire Harness Side:
Air Injection Driver Connector
A41
SIPSIVDI E
B17417
E4
AIRP
AIRV DI±350
± DIAGNOSTICSENGINE
544 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check voltage

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