Toyota Sienna Service Manual: Check for intermittent problems
1. CHECK FOR INTERMITTENT PROBLEMS
HINT: For use of the intelligent tester only: Inspect the vehicle's ECM using check mode.
Intermittent problems are easier to detect with an intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.
- Clear the DTCs.
- Switch the ECM from normal mode to check mode using an intelligent tester.
- Perform a simulation test.
- Check and wiggle the harness(es), connector(s) and terminal(s)
How to proceed with
troubleshooting
HINT:
The intelligent tester can be used in steps 2, 3, 4, 6 and 9.
1 VEHICLE BROUGHT TO WORKSHOP
2 CONNECT INTELLIGENT TESTER TO DLC3
HINT:
If the display indicates a communication fault in the ...
Basic inspection
When a malfunction is not confirmed by the DTC check,
troubleshooting should be carried out in all circuits
considered to be possible causes of the problem. In many
cases, by carrying out the basic ...
Other materials:
Combination Meter ECU Communication Stop
DTC B1271 Combination Meter ECU Communication Stop
DESCRIPTION
DTC B1271 is output when communication between the combination meter and the
multiplex network
gateway ECU stops for more than 10 seconds.
DTC No.
DTC Detection Condition
Trouble Area
B1271
...
Stereo component amplifier
COMPONENTS
Removal
1. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY
2. REMOVE STEREO COMPONENT AMPLIFIER ASSEMBLY
Disconnect the connectors.
Remove the 2 nuts and the stereo component
amplifier assembly.
Installation
1. INSTALL STEREO COMPONENT AMPLIFIER ASSEMBLY
...
No Master/ Connection Check Error
DTC 01-D6 No Master
DTC 01-D7 Connection Check Error
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
01-D6
*1
When either of the following conditions is met:
The component which has stored the code has
(had) been disconnected when the ...
