Toyota Sienna Service Manual: Control Module Performance
DESCRIPTION
The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from the CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.
The ECM also monitors the cruise control cancel circuit. If this circuit malfunctions, the ECM will set a DTC immediately (MIL is not illuminated).
| NOTICE: First check for an exhaust gas leak around the HO2S if P0606 is present. An exhaust gas leak generates noise in the HO2S output. The ECM may interpret this as an HO2S transistor malfunction. |
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
INSPECTION PROCEDURE
1 CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P0607)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Clear the DTC.
(e) Turn the ignition switch off.
(f) Disconnect the battery negative terminal and wait for 1 minute.
(g) Connect the battery negative terminal.
(h) Turn the ignition switch to the ON position.
(i) Enter the following menus: DIAGNOSIS / ENHANCED II / DTC INFO / CURRENT CODES.
(j) Read the DTCs.
Result 
REPLACE ECM
ECM / PCM Processor
DESCRIPTION
The ECM continuously monitors its internal processors (CPUs), A/F sensor
transistors and heated oxygen
sensor (HO2S) transistors. This self-check ensures that the ECM is functionin ...
Starter Relay Circuit High
MONITOR DESCRIPTION
While the engine is being cranked, the positive battery voltage is applied to
terminal STA of the ECM.
If the ECM detects the Starter Control (STA) signal while the vehic ...
Other materials:
How to use this manual
GENERAL INFORMATION
1. GENERAL DESCRIPTION
(a) This manual is written in accordance with SAE J2008.
(b) Repair operations can be separated mainly in the following 3 processes:
(1) Diagnosis
(2) Removing / Install ...
Removal
1. BOLT, SCREW AND NUT TABLE
The bolts, the screws and the nuts, which are
necessary for installation and removal of the
instrument panel are shown in the illustration below
with alphabets.
2. DISCONNECT BATTERY NEGATIVE TERMINAL
3. REMOVE STEERING WHEEL COVER LOWER NO.2
4. ...
Short to B+ in Rear Curtain Shield Squib RH
Circuit
DTC B1633/82 Short to B+ in Rear Curtain Shield Squib RH
Circuit
DESCRIPTION
The rear curtain shield squib RH circuit consists of the center airbag sensor
assembly and the curtain
shield airbag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B ...
