Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VIZM |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 -
] |
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1552,C1554; PIG Power Supply Voltage Malfunction; 2016 - 2020 MY Sienna [12/2015 - ] |
DTC
|
C1552
|
PIG Power Supply Voltage Malfunction
|
DTC
|
C1554
|
Power Supply Relay Failure
|
DESCRIPTION
When a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop the power assist. The ECU must be replaced when there is a problem with the relays because each relay is built into the ECU.
DTC No.
|
DTC Detection Condition
|
Trouble Area
|
C1552
|
PIG power source circuit malfunction
|
-
PIG power source circuit
-
Steering column assembly
|
C1554
|
Power source relay circuit malfunction
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When the steering column assembly is replaced, perform the assist map writing (See page
).
-
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
|
CHECK HARNESS AND CONNECTOR (STEERING COLUMN ASSEMBLY - BATTERY AND BODY GROUND)
|
(a) Disconnect the connector from the steering column assembly (power steering ECU).
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
D36-1 (PIG) - Body ground
|
Always
|
11 to 14 V
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
D36-2 (PGND) - Body ground
|
Always
|
Below 1 Ω
|
Text in Illustration
*a
|
Front view of wire harness connector:
(to Steering Column Assembly (Power Steering ECU))
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|