Toyota 4Runner: Test Mode Procedure

Toyota 4Runner Service Manual / Suspension / Tire Pressure Monitoring / Tire Pressure Warning System / Test Mode Procedure

TEST MODE PROCEDURE

1. PERFORM SIGNAL CHECK

HINT:

When entering signal check mode, the tire pressure warning ECU stores all the signal check DTCs first. After completing the signal check for each inspection item, the DTCs for systems that are determined to be normal by the tire pressure warning ECU are cleared.
The DTCs for other inspection items may not be cleared when only a certain signal is inspected.
When signal check returns to normal mode, all the signal check DTCs are cleared.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Tire Pressure Monitor / Utility / Signal Check.

HINT:

Every time the test mode DTC clear conditions are satisfied, the tire pressure warning light turns on for 1 second. Then, the tire pressure warning light blinks at 0.125 second intervals.

(f) Start the engine and allow it to run at 1000 rpm for 3 seconds or more to check the engine speed signal (C2194/94).

(g) Drive the vehicle at 20 km/h (12 mph) or more for 3 seconds or more to check the vehicle speed signal (C2191/91).

(h) Loosen the valve core and rapidly reduce the pressure by at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds to check the transmitter data (C2181/81 to C2184/84 or C2185/85*).

*: w/ Spare Tire Pressure Warning Valve and Transmitter

HINT:

The transmitter ID can be transmitted by rapidly reducing the tire pressure.

(i) Check that the tire pressure warning system test mode DTCs are cleared.

Test Mode DTC	Test Signal	Test Mode DTC Clear Condition
C2181/81 to C2184/84 (C2185/85*)	Transmitter Data	Receive data from transmitter which has registered ID in tire pressure warning ECU
C2191/91	Vehicle Speed Signal	Vehicle speed of 20 km/h (12 mph) or more is detected for 3 seconds or more
C2194/94	Engine Speed Signal	Engine speed of 1000 rpm or more is detected for 3 seconds or more

Test Mode DTC

Test Signal

Test Mode DTC Clear Condition

C2181/81 to C2184/84

(C2185/85*)

Transmitter Data

Receive data from transmitter which has registered ID in tire pressure warning ECU

C2191/91

Vehicle Speed Signal

Vehicle speed of 20 km/h (12 mph) or more is detected for 3 seconds or more

C2194/94

Engine Speed Signal

Engine speed of 1000 rpm or more is detected for 3 seconds or more

*: w/ Spare Tire Pressure Warning Valve and Transmitter

(j) Result

HINT:

After the signal check is completed, check for test mode (signal check mode) DTCs to confirm the system status.

Condition	Procedure
Test mode DTCs are output	Repair faulty part and enter Signal Check again
Test mode DTCs are cleared	No problem

(k) End of test mode (signal check mode)

(1) After completing test mode (Signal Check mode), turn the ignition switch off and disconnect the Techstream.

(l) Test mode (signal check mode) DTCs

(1) If a trouble code is output during the test mode (signal check mode) DTC check, check the diagnosis procedure listed for that code. For details of each code, refer to "See page" below.

DTC Code	Detection Item	See page
C2181/81	Transmitter ID1 not received
C2182/82	Transmitter ID2 not received
C2183/83	Transmitter ID3 not received
C2184/84	Transmitter ID4 not received
C2185/85*	Transmitter ID5 not received
C2191/91	Vehicle speed signal error
C2194/94	Engine speed signal error

*: w/ Spare Tire Pressure Warning Valve and Transmitter

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