Vehicle check
Checking the TRC Operation Indicator
Turn on the ignition (ON). Make sure the TRC operation indicator is on for about 3 seconds.
Checking the indicator "TRC OFF"
1. Turn on the ignition (ON). Make sure the indicator "TRC" lights up for about 3 seconds.
2. After the indicator "TRC OFF" off, press the button "TRC OFF". In this case, the indicator should light up.
Press the button again and check that the indicator "TRC OFF" went out.
Location of TRC system components
1 - ABS electronic control unit,
2 - brake light switch,
3 - instrument panel,
4 - additional throttle position sensor,
5 - TRC system switch ("TRC OFF"),
6 - electronic control unit for the TRC system,
7 - diagnostic connector,
8 - deceleration sensor,
9 - deceleration sensor rotor,
10 - fuse "TRC",
11 - fuse "ECU-B",
12 - front speed sensor,
13 - rotor of the front speed sensor,
14 - additional throttle servo,
15 - fuse "ECU",
16 - fuse "GAUGE",
17 - stoplight fuse.
Checking the auxiliary throttle servo
Set the automatic transmission selector to position "R" or "N", turn on the ignition and check (by sound), that the auxiliary throttle servo has operated.
Note: do not press the accelerator pedal.
Troubleshooting
Diagnostic system
1. Safety mode "fail safe".
A) In case of failure of any element of the TRC system, as well as elements of the electronic engine control unit or control unit, emergency operation is provided (to get to the nearest service station). At the same time, the TRC system operation signal and the signal "TRC OFF".
b) In case the indicator is on "TRC OFF" (or indicator "TRC OFF" and TRC operation indicator), the secondary throttle servo is disengaged and the secondary throttle is spring-loaded to the fully open position.
2. Checking with diagnostic codes.
A) Disconnect the wiring harness and short the leads "TS" And "EG diagnostic connector.
Note: turn on the ignition. Do not confuse the conclusions - this can cause damage.
b) Turn on the ignition and by the number of blinks of the indicator "TRC OFF" read fault codes.
In the absence of a malfunction, the light panel flashes every 0.5 seconds (flash duration - 0.25 sec).
If there is a malfunction, the first sequence of flashes (duration 0.5 sec) corresponds to the first number of the diagnostic code, which consists of two numbers. After a pause of 1.5 seconds, a second sequence of flashes is displayed, corresponding to the second number of the code. If there are two or more fault codes, an interval of 2.5 seconds is set between them when outputting.
After all codes are output, there is a pause of 4.0 s, and then they all repeat until the outputs "TS" And "E1" diagnostic connector are shorted.
3. Erasing diagnostic codes.
A) Disconnect the wiring harness and short the leads "TS" And "E1" diagnostic socket.
Note: Do not confuse the leads as this may cause damage.
b) Turn on the ignition.
V) Turn the TRC switch on and off more than 8 times within 3 seconds.
G) Verify that the indicator is displaying a no-fault code.
Note: if the same codes are issued as before erasing, repeat the paragraph (V).
d) Remove the jumper.
e) Switch the ignition back on and check that the lamp "TPC OFF" goes out after 3 seconds of burning.
Secondary throttle servo
Check for continuity between the throttle servo leads.
Circuit breaker test "TRC OFF"
Turn on the switch and check the continuity between the terminals "CSW" And "E".
Switch:
- not pressed - no conduction
- pressed - there is conductivity
Checking the auxiliary throttle position sensor
To check the auxiliary throttle position sensor, see section "throttle body".
Checking the electronic control unit for the TRC system
1. Turn off the ignition (OFF), disconnect the ECM connector and measure the resistance between the following terminals:
2. Measure the voltage between the terminals of the electronic control unit for the TRC system.
Connector of the electronic control unit of the TRC system