Toyota Tacoma 2015-2018 Service Manual: Cruise Control Input Processor (P160700)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Cruise Control System(for 2gr-fks) / Cruise Control Input Processor (P160700)

DESCRIPTION

When the ECM determines that there is a malfunction, the ECM illuminates the MIL and stores a DTC.

HINT:

When these DTCs are stored, the ECM cuts the current supplied to the throttle motor and the throttle valve returns to the predetermined opening amount by the return spring.

DTC Code	DTC Detection Condition	Trouble Area	MIL	Note
P160700	ECM CPUs malfunction (1 trip detection logic)	SFI system	Comes on	SAE: P1607

MONITOR 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 standard, illuminate the MIL and store the DTC immediately.

MONITOR STRATEGY

Related DTC	P1607: Internal control module Performance
Required sensors/Components (Main)	ECM
Required sensors/Components (Related)	Cruise control
Frequency of Operation	Continuous
Duration	0.3 seconds
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Cruise control	Forbiddance
DMA communication error	Not detected

TYPICAL MALFUNCTION THRESHOLDS

Cruise control

Operating

CONFIRMATION DRIVING PATTERN

HINT:

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure (See page ).

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the Techstream off.
Turn the ignition switch off.
Disconnect the Techstream.
Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
Connect the cable to the negative (-) battery terminal.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Turn the cruise control main switch on.
Wait 16 seconds or more.[*1]
HINT:

[*1] : Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / Cruise Control / Trouble Codes.
Read the DTCs.
HINT:
- If a DTC is output, the system is malfunctioning.
- If a DTC is not output, perform the following procedure.
If the DTCs are not output, perform a universal trip and check for permanent DTCs (See page ).
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

CAUTION / NOTICE / HINT

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page (b) Perform the following to make sure that the DTC detection conditions are ).

(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed for which cruise control operation is possible.

(2) Turn the cruise control system on using the cruise control main switch (ON/OFF).

(3) Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.

OK:

DTC P160700 is not output

USE SIMULATION METHOD TO CHECK

GO TO SFI SYSTEM

Brake Switch "A" Signal Compare Failure (P057162)

DESCRIPTION When the brake pedal is depressed, stop light switch assembly sends a signal to the ECM. Upon receiving the signal, the ECM cancels the cruise control system. DTC Code ...

Cruise Control Switch Circuit

DESCRIPTION This circuit sends signals to the ECM depending on the cruise control main switch condition. The battery supplies the positive (+) battery voltage to the cruise control main switch. ...

Other materials:

TC and CG Terminal Circuit
DESCRIPTION DTC output mode is set by connecting terminals TC and CG of the DLC3. The DTCs are displayed by blinking the SRS warning light. HINT: Make sure that DTCs which relate to the CAN communication system are not output. If any of these DTCs are output, check the CAN communicat ...

Control Module Communication Bus OFF (U0073,U0100,U0124,U0126)
DESCRIPTION The skid control ECU (brake actuator assembly) receives the signals from the ECM, steering angle sensor (spiral cable with sensor sub-assembly), 4 wheel drive control ECU*, and yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system. *: f ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...