PINPOINT TEST G258127P6

Pinpoint Tests

PINPOINT TEST G258127p6 : DTC P0131, P0132, P0133, P1646; RIGHTHAND H02S SENSING CIRCUIT LOW/HIGH CURRENT, SLOW RESPONSE, ECM CONTROL MALFUNCTION

G258127t17 : CHECK THE H02S VARIABLE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the H02S electrical connector, PI10.
3. Disconnect the ECM electrical connector, PI01.
4. Measure the resistance between PI10, pin 03 (R) and PI01, pin 83 (R).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t18.

G258127t18 : CHECK THE H02S VARIABLE CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Reconnect the battery negative terminal.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between PI01, pin 83 (R) and GROUND.

- Is the voltage greater than 3 volts?

->YES
REPAIR the short circuit to high voltage. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t19.

G258127t19 : CHECK THE H02S VARIABLE CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between PI01, pin 83 (R) and GROUND.

- Is the resistance less than 10,000 Ohms?

->YES
REPAIR the short circuit to GROUND. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t20.

G258127t20 : CHECK THE H02S CONSTANT CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between PI10, pin 04 (Y) and PI01, pin 84 (Y).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t21.

G258127t21 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Measure the voltage between PI10, pin 04 (Y) and GROUND.

- Is the voltage greater than 3 volts?

->YES
REPAIR the short circuit to high voltage. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t22.

G258127t22 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between PI10, pin 04 (Y) and GROUND.

- Is the resistance less than 10,000 Ohms?

->YES
REPAIR the short circuit to GROUND. CLEAR the DTC. TEST the system for normal operation.

->NO
INSTALL a new H02S. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer technical support for advice on possible ECM failure.