Engine Controls - System/component Tests: Diagnosis Saab 9-5 I рестайлинг

Testing Turbocharger Charge Air Cooler and Delivery Pipes (9-3 & 9-5 - 2.3L)

1. Remove bypass pipe. Remove nut, 2 clips and exhaust manifold heat shield. Disconnect and plug hose from turbocharger outlet. Remove engine cover. Disconnect and plug charge air pipe from throttle body. On M/T, disconnect venturi hose from charge air pipe. Connect Pressure Gauge Adapter (38-93-514). (Scheme 1) Connect pressure gauge. Connect vacuum/pressure pump to charge air bypass valve. Apply 14.5 psi of pressure to charge air bypass valve.
2. Connect air gun to pressure gauge and apply about 14.5 psi of pressure. Ensure pressure does not drop by more than 1.45 psi in 30 seconds. If pressure drop is more than specified, or a hissing sound is present, check hoses, pipes and connection for leaks. Ensure no leaks are present in testing equipment. If testing equipment is okay, remove charge air cooler and hoses. See «REMOVAL, OVERHAUL & INSTALLATION»(ref-152077) article. Plug one end or charge air cooler hose and apply 14.5 psi of air pressure to other end. (Scheme 2) Ensure pressure does not drop by more than 1.45 psi in 30 seconds. If pressure drop is more than specified, or a hissing sound is present, check hoses, pipes and connection for leaks.

Scheme 1

Scheme 2

Testing Turbocharger Charge Air Cooler And Delivery Pipes (9-5 - 3.0L)

1. Remove engine cover. Disconnect bypass pipe from intake pipe. Remove turbocharger pressure hose from throttle body. Remove front exhaust manifold heat shield. Disconnect and plug hose from turbocharger outlet. Disconnect and plug charge air pipe from throttle body. Connect Pressure Gauge Adapter (38-93-514). (Scheme 1) Connect pressure gauge. Connect vacuum/pressure pump to charge air bypass valve. Apply 14.5 psi of pressure to charge air bypass valve.
2. Connect air gun to pressure gauge and apply about 14.5 psi of pressure. Ensure pressure does not drop by more than 1.45 psi in 30 seconds. If pressure drop is more than specified, or a hissing sound is present, check hoses, pipes and connection for leaks. Ensure no leaks are present in testing equipment. If testing equipment is okay, remove charge air cooler and hoses. See «REMOVAL, OVERHAUL & INSTALLATION»(ref-152077) article. Plug one end of charge air cooler hose and apply 14.5 psi of air pressure to other end. (Scheme 2) Ensure pressure does not drop by more than 1.45 psi in 30 seconds. If pressure drop is more than specified, or a hissing sound is present, check hoses, pipes and connection for leaks.

Testing Turbocharger Charge Air Pressure With Engine Running (9-3)

1. Start engine. Ensure engine is at operating temperature. Install pressure gauge to intake manifold. (Scheme 3) Drive vehicle. Accelerate at Wide Open Throttle (WOT), in 3rd gear, with engine speed at 1500 RPM or more. When engine speed approaches 3000 RPM, depress brake pedal while keeping accelerator panel at WOT. Turbocharger system pressure should be within specification. See «TURBOCHARGER PRESSURE (9-3)»(ref-12212-S42089356682002012100000) table.
2. If turbocharger pressure is not within specifications adjust basic charging pressure. See «ON-VEHICLE ADJUSTMENTS»(ref-132873) article.

TURBOCHARGER PRESSURE (9-3)

Scheme 3

See also:
• P0410: SECONDARY AIR INJECTION SYSTEM - INCORRECT AIRFLOW