PINPOINT TEST G531332P6

Pinpoint Tests

PINPOINT TEST G531332p6 : RIGHT-HAND H02S SENSING CIRCUIT LOW/HIGH CURRENT, SLOW RESPONSE, ECM CONTROL MALFUNCTION

G531332t17 : CHECK THE H02S VARIABLE CIRCUIT FOR HIGH RESISTANCE
1. Key off.
2. Disconnect the H02S electrical connector, PI10.
3. Disconnect the ECM electrical connector, PI300.
4. Measure the resistance between:

ECM connector PI300, HO2S connector PI10,
harness side harness side
Pin 28 Pin 04

- 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 G531332t18.

G531332t18 : CHECK THE H02S VARIABLE CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Key on, engine off.
2. Measure the voltage between:

HO2S connector PI10, Battery
harness side
Pin 04 Negative terminal

- 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 G531332t19.

G531332t19 : CHECK THE H02S VARIABLE CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Key off.
2. Measure the resistance between:

HO2S connector PI10, Battery
harness side
Pin 04 Negative terminal

- Is the resistance less than 10,000 Ohms?

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

->NO
GO to Pinpoint Test G531332t20.

G531332t20 : CHECK THE H02S CONSTANT CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between:

ECM connector PI300, HO2S connector PI10,
harness side harness side
Pin 29 Pin 03

- 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 G531332t21.

G531332t21 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the voltage between:

HO2S connector PI10, Battery
harness side
Pin 03 Negative terminal

- Is the voltage greater than 3 volts?

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

->NO
GO to Pinpoint Test G531332t22.

G531332t22 : CHECK THE H02S CONSTANT CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between:

HO2S connector PI10, Battery
harness side
Pin 03 Negative terminal

- Is the resistance less than 10,000 Ohms?

->YES
REPAIR the short circuit. 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, refer to the warranty policy and procedures if an ECM is suspect.